1977 Mercury Cougar Alternator Parts

Keep Your 1977 Mercury Cougar in Top Shape with Quality Alternator Parts

Whether you’re repairing or upgrading your Alternator Part, using high-quality parts is key to keeping your 1977 Mercury Cougar looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Commutator End Bearings, Alternator Pigtails, and Alternator and Generator Brush Parts. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Alternator Parts from Trusted Brands

Looking for a reliable Alternator Part? We’ve got you covered with options from brands you know and trust like Carquest Premium and DriveWorks. For example, Carquest Premium Alternator Parts start at just $84.99 with an average 4.4 star rating. DriveWorks offer similar pricing and quality, backed by strong customer feedback. With over 1,023 reviews and a solid 3 star average, you can shop with confidence knowing other Mercury Cougar owners approve.

Explore Related Parts

While you’re upgrading or replacing your Alternator Part, don’t forget to check out other key components like Ignition Lock Parts and Starter Parts. At Advance Auto Parts, we’re here to help you keep your 1977 Mercury Cougar in peak condition, inside and out.

Essential 1977 Mercury Cougar Alternator Parts

Driveworks – Ball Bearing (Part No.SL-203-FF)

Ball Bearing

from

$13.49
Value-priced bearing meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
See More

Driveworks – Ball Bearing (Part No.S-201-CC)

Ball Bearing

from

$2.99
Value-priced bearing meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
See More

National – Multi-Purpose Bearing (Part No.MNJ-471-S)

Multi-Purpose Bearing

from

$14.49
Product Features:
  • RIGHT TYPE: Needle bearings are application-specific for the repair occasion, using either caged or full complement designs
  • PREMIUM MATERIALS: Precision manufactured using high-quality materials for outstanding durability and performance
  • OE-STYLE DESIGN: Engineered to meet OE specifications
  • COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
  • RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
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National – Multi-Purpose Bearing (Part No.203)

Multi-Purpose Bearing

from

$19.49
Product Features:
  • BUILT TO LAST: Advanced heat treatment process for strength
  • PREMIUM MATERIALS: Precision manufactured using premium-grade steel for lasting performance and extended bearing life
  • RELIABLE PERFORMANCE: Element size and quantity are engineered to meet or exceed the load rating of OE bearings
  • COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
  • RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
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Carquest Premium – Alternator Brush Set (Part No.XAA1029)

Alternator Brush Set

from

$3.99
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
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Carquest – Starter Brush Holder Assembly (Part No.X380)

Starter Brush Holder Assembly

from

$8.99
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:
  • Designed to OE standards for ease of installation
  • BWD is a global manufacturer of original equipment ignition products, complete quality control is maintained through the manufacturing process from componentry to finished product
See More

Carquest Premium – Alternator Brush Set (Part No.SCA1211)

Alternator Brush Set

from

$2.49
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
See More

Carquest Premium – Alternator Brush Set (Part No.XAA1057)

Alternator Brush Set

from

$9.99
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
See More

Carquest Premium – Alternator Brush Set (Part No.XAA1043)

Alternator Brush Set

from

$6.99
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
See More

Carquest Premium – Alternator Brush Set (Part No.XAA1039)

Alternator Brush Set

from

$7.79
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
See More

Carquest Premium – Alternator Brush Holder (Part No.XAC1059)

Alternator Brush Holder

from

$8.79
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
See More

Carquest Premium – Multi-Use Connector (Part No.PTA1197)

Multi-Use Connector

from

$11.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
See More

Carquest Premium – Multi-Use Connector (Part No.PTA3249)

Multi-Use Connector

from

$104.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
See More

Motorcraft – MOTOR – WINDOW (Part No.WPT-119)

MOTOR - WINDOW

from

$19.99
MOTOR – WINDOW

Carquest – Alternator Electrical Connector (Part No.PT754)

Alternator Electrical Connector

from

$17.99
BWD is an aftermarket leader, providing a premium line of engine management products. BWD manufactures and distributes high technology critical components for late model domestic and import vehicles. BWD is constantly evolving to give customers the competitive edge they need to compete in today’s ever-changing marketplace.

Product Features:
  • Our knock sensors are designed to respond to knock frequencies up to 1000 Hz accommodating shifts in engine knock frequency making it a more flexible sensor responding to correct engine knock over a broad range of vehicle conditions
  • Manufacturing processes include an automated data acquisition system to continuously monitor the sensor output to ensure that it responds with appropriate voltage output at the specified frequency range
  • All units are 100% tested using an accelerometer vibration test to ensure trouble-free operation
  • Featuring the broadest sensor coverage in the market, we meet the service professionals needs with the highest quality product every time he opens the box
  • BWD is a global manufacturer of original equipment ignition products, complete quality control is maintained through the manufacturing process from componentry to finished product
See More

Carquest Premium – Multi-Use Connector (Part No.PTA1348)

Multi-Use Connector

from

$14.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
See More

Carquest Premium – Multi-Use Connector (Part No.PTA1367)

Multi-Use Connector

from

$3.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
See More

Carquest Premium – Alternator: Remanufactured, 95 Amps (Part No.7757A)

Alternator: Remanufactured, 95 Amps

from

$141.99
Carquest Premium alternators are premium constructed, original equipment (O.E.) replacement parts with industry-leading limited warranties. Our Carquest Premium alternators are designed to meet or exceed OE specifications for fit, form and function. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading limited warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:


    Product Features:
    • Designed to meet or exceed OE specifications for fit, form and function
    • Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
    • Regulators and rectifiers are 100% electronically load tested for reliable charging performance
    • 100% new OE-quality brushes and bearings are used to ensure long service life
    • Rotors and stators are load tested and double insulated for maximum charging performance
    • Slip rings are precision polished for maximum brush contact and service life
    • Application-specific technical bulletins included where applicable
    • All units are 100% triple tested to ensure quality and performance
    • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
See More

Carquest HD Electrical – Alternator: New, 130 Amps, Without Pulley (Part No.71-7764N-0G)

Alternator: New, 130 Amps, Without Pulley

from

$156.99
Carquest Starters with 100% NEW construction will restore hard working vehicles to exceed OE specified performance & endurance. All new units and components offer unmatched performance, reduce downtime & customer comebacks. Carquest HD alternators are primed to keep you moving forward. Built to perform in severe duty environments where consistent efficient high outputs are required.

Product Features:


    Product Features:
    • Contains Innovative Brush-less and Premium Brush Components that have been tested and certified for highest possible power output
    • Stator – wound to OE specifications. Heavy coated Polyester wire provides consistent conductivity
    • Premium Transpo rectifiers use 13mm press fit Diodes for maximum performance
    • Rotor shafts CNC machined & precision balanced to eliminate vibration
    • Over-Voltage shutdown limits voltage if output terminal is disconnected form the battery
    • Load dump protection ensures transient voltage spikes do not damage transistor
    • Improved power transmission with lower engine speed keeps accessories and powered implements running at maximum output without additional load to the engine.
See More

Carquest Premium – Alternator: Remanufactured, 65 Amps, Limited Lifetime Warranty (Part No.7088-10A)

Alternator: Remanufactured, 65 Amps, Limited Lifetime Warranty

from

$122.99
Carquest Premium alternators are premium constructed, original equipment (O.E.) replacement parts with industry-leading limited warranties. Our Carquest Premium alternators are designed to meet or exceed OE specifications for fit, form and function. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading limited warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:


    Product Features:
    • Designed to meet or exceed OE specifications for fit, form and function
    • Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
    • Regulators and rectifiers are 100% electronically load tested for reliable charging performance
    • 100% new OE-quality brushes and bearings are used to ensure long service life
    • Rotors and stators are load tested and double insulated for maximum charging performance
    • Slip rings are precision polished for maximum brush contact and service life
    • Application-specific technical bulletins included where applicable
    • All units are 100% triple tested to ensure quality and performance
    • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
See More

Bosch – Alternator: New, 130 Amps (Part No.AL7547N)

Alternator: New, 130 Amps

from

$239.99
The Bosch Premium Alternator is engineered for exceptional performance and reliability, making it a top choice for your vehicle’s electrical system. With an impressive amperage rating of 130 amps and a 12 VDC output, this alternator ensures consistent power delivery to support your car’s essential functions and accessories. Designed for clockwise rotation, it is built to meet or exceed OEM specifications, ensuring seamless compatibility and hassle-free installation. Crafted with precision and tested rigorously, this alternator offers long-lasting durability, making it a dependable solution for your vehicle’s power needs. Whether you’re replacing a worn-out unit or upgrading for better performance, the Bosch Premium Alternator delivers outstanding value and peace of mind.

Product Features:


    Product Features:
    • Provides a robust 130-amp output to reliably power your vehicle’s electrical system and accessories.
    • Engineered to meet or exceed OEM specifications for seamless compatibility and easy installation.
    • Designed with clockwise rotation for optimal performance in compatible vehicles.
    • Rigorously tested for durability and reliability, ensuring long-lasting operation under demanding conditions.
    • Delivers consistent 12 VDC output for stable and efficient power delivery.
See More

Carquest Professional – Alternator: New, 75 Amps, Limited Lifetime Warranty (Part No.7716-10AN)

Alternator: New, 75 Amps, Limited Lifetime Warranty

from

$183.99
Carquest Professional alternators are 100% new units that are built to meet or exceed original equipment (O.E.) specifications. Our new alternators are engineered and built by an IATF/TS 16949 certified supplier that meets the highest standards achievable. Carquest Professional alternators are re-engineered to include improvements and enhancements (where applicable) to the OE design to extend longevity and service life. Our new alternators are built with all new components and are 100% triple tested to ensure high quality that is backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:
  • Designed to meet or exceed OE specifications for fit, form and function
  • Manufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
  • All new components are utilized to ensure long service life
  • Housings are 100% new with dimensions computer gauged and measured to ensure proper fitment
  • Internal electronics are upgraded for heavy duty reliability (where applicable)
  • Regulators and rectifiers are 100% electronically load tested for reliable charging performance
  • Application-specific technical bulletins included where applicable
  • All units are 100% triple tested to ensure quality and performance
  • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
  • Rotors and stators are load tested and double insulated for maximum charging performance
See More

Carquest HD Electrical – Alternator: New, 115 Amps, Without Pulley (Part No.71-7776N-0G)

Alternator: New, 115 Amps, Without Pulley

from

$188.99
Carquest Starters with 100% NEW construction will restore hard working vehicles to exceed OE specified performance & endurance. All new units and components offer unmatched performance, reduce downtime & customer comebacks. Carquest HD alternators are primed to keep you moving forward. Built to perform in severe duty environments where consistent efficient high outputs are required.

Product Features:
  • High quality components form the foundation our parts are built from. Transpo¿s innovative and high quality electronic technologies for internal components are incorporated to achieve high performance outputs.
  • High quality components form the foundation our parts are built from. Transpo┐s innovative and high quality electronic technologies for internal components are incorporated to achieve high performance outputs.
  • Power & Efficiency are designed into every component. No matter the ambient temperature, starters will provide maximum cranking power to get engines running.
  • Connectors and power transmission components are highly resistant to extreme moisture environments because we use nickel plated contactors and double armature coating. We maintain a rigorous test schedule with endurance, salt spray, dirt and grime and out
  • Integrated magnetic switch provides protection against weak power from batteries.
  • Over-Crank Protection (OCP) Monitors heat in starter from over cranking & shuts down starter to prevent burning
  • Precision design and machining are the Extreme vibration failure solution. Vehicles often perform in adverse conditions like extreme temperatures that create tolerance shifts that produce high frequency vibration, which leads to resistance in power transf
  • Load dump protection ensures transient voltage spikes do not damage transistor
  • Improved power transmission with lower engine speed keeps accessories and powered implements running at maximum output without additional load to the engine.
See More

Carquest Premium – Alternator: Remanufactured, 90 Amps, Limited Lifetime Warranty (Part No.7074-9A)

Alternator: Remanufactured, 90 Amps, Limited Lifetime Warranty

from

$192.99
Carquest Premium alternators are premium constructed, original equipment (O.E.) replacement parts with industry-leading limited warranties. Our Carquest Premium alternators are designed to meet or exceed OE specifications for fit, form and function. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading limited warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:


    Product Features:
    • Designed to meet or exceed OE specifications for fit, form and function
    • Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
    • Regulators and rectifiers are 100% electronically load tested for reliable charging performance
    • 100% new OE-quality brushes and bearings are used to ensure long service life
    • Rotors and stators are load tested and double insulated for maximum charging performance
    • Slip rings are precision polished for maximum brush contact and service life
    • Application-specific technical bulletins included where applicable
    • All units are 100% triple tested to ensure quality and performance
    • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
See More

Bosch – Alternator: Remanufactured, 60 Amps, 2 Year Limited Warranty (Part No.AL578X)

Alternator: Remanufactured, 60 Amps, 2 Year Limited Warranty

from

$156.99
The Bosch Premium Alternator delivers exceptional performance and reliability, making it a top choice for your vehicle’s electrical system. With a 60-amp output and 12 VDC voltage, this alternator is full-load tested to meet Bosch’s rigorous performance standards. Unlike rebuilt units, it is 100% factory-tested and remanufactured using high-quality materials and cutting-edge technology, ensuring long-lasting durability. Designed for clockwise rotation, it is engineered to handle demanding conditions while maintaining consistent power delivery. Whether you’re replacing a worn-out alternator or upgrading for better performance, this Bosch unit offers unmatched value and dependability.

Product Features:


    Product Features:
    • Full-load tested to guarantee compliance with Bosch’s strict performance specifications
    • 100% factory tested, units are remanufactured (not rebuilt)
    • Built to last – uses high quality materials and the most technologically advanced developments.
    • Designed with a clockwise rotation for seamless integration into compatible vehicle systems.
See More

Carquest Standard – Alternator: Remanufactured, 130 Amps, 1 Year Limited Warranty (Part No.7771-11-6GAV)

Alternator: Remanufactured, 130 Amps, 1 Year Limited Warranty

from

$164.99
Carquest Standard alternators are designed and built to meet original equipment (O.E.) specifications, while providing great value. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. All of our Carquest Standard alternators are inspected and 100% tested to ensure they are built to meet OEM fit, form and function. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:


    Product Features:
    • Designed to meet OE specifications for fit, form and function
    • Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
    • Application-specific technical bulletins included where applicable
    • All units are 100% triple tested to ensure quality and performance
    • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
See More

Carquest HD Electrical – Alternator: New, 80 Amps, With Pulley (Part No.71-7745-10N)

Alternator: New, 80 Amps, With Pulley

from

$165.99
Carquest Starters with 100% NEW construction will restore hard working vehicles to exceed OE specified performance & endurance. All new units and components offer unmatched performance, reduce downtime & customer comebacks. Carquest HD alternators are pri

Product Features:
  • High quality components form the foundation our parts are built from. Transpo’s innovative and high quality electronic technologies for internal components are incorporated to achieve high performance outputs.
  • Power & Efficiency are designed into every component. No matter the ambient temperature, starters will provide maximum cranking power to get engines running.
  • Connectors and power transmission components are highly resistant to extreme moisture environments because we use nickel plated contactors and double armature coating. We maintain a rigorous test schedule with endurance, salt spray, dirt and grime and out
  • Integrated magnetic switch provides protection against weak power from batteries.
  • Over-Crank Protection (OCP) Monitors heat in starter from over cranking & shuts down starter to prevent burning
  • Precision design and machining are the Extreme vibration failure solution. Vehicles often perform in adverse conditions like extreme temperatures that create tolerance shifts that produce high frequency vibration, which leads to resistance in power transf
  • Load dump protection ensures transient voltage spikes do not damage transistor
  • Improved power transmission with lower engine speed keeps accessories and powered implements running at maximum output without additional load to the engine.
See More

WAI – Ford 3G Ir/If 95 Amp/12 Volt, Cw, 6-Groove Pulley, 11:00 Plug Clock, Limited Lifetime Warranty (Part No.7755-11N-6G)

Ford 3G Ir/If 95 Amp/12 Volt, Cw, 6-Groove Pulley, 11:00 Plug Clock, Limited Lifetime Warranty

from

$187.99
This 95-amp alternator from WAI is a premium choice for those seeking reliability and performance in their vehicle’s electrical system. Engineered to meet or exceed OEM specifications, it ensures a perfect fit and hassle-free installation. The advanced voltage regulator protection guards against transient voltage spikes, preventing potential battery damage, while its low saturation voltage minimizes heat dissipation for enhanced durability. The high-power rectifier assembly, equipped with open junction press-fit diodes, keeps the unit running cool even under demanding conditions. Fully compliant with ECU communication, this alternator guarantees seamless integration with your vehicle’s system. Each unit is rigorously tested, and a printed copy of the test results is included, giving you confidence in its performance from the moment it powers on. With WAI’s commitment to quality, this alternator delivers exceptional value and dependable operation for your vehicle.

Product Features:
  • Engineered to meet or exceed OEM specifications for a perfect fit and hassle-free installation.
  • Voltage regulator protection – load dump protected against transient voltage spikes avoiding potential battery damage. Low saturation voltage results in lower heat dissipation. Fully compliant in communication with ECU.
  • High power rectifier assembly is designed with higher power open junction press fit diodes to keep the units running cool.
  • Each unit includes a printed copy of the test results so you know exactly what to expect from our parts right from the first time they power on.
  • Designed for enhanced durability, the alternator’s low saturation voltage minimizes heat dissipation, ensuring reliable performance even under demanding conditions.
See More

Most Popular Commutator End Bearings for 1977 Mercury Cougars

Enhance your 1977 Mercury Cougar with one of the 2 Commutator End Bearings we have in stock, starting at just $13.49.

Driveworks – Ball Bearing (Part No.SL-203-FF)

Ball Bearing

from

$13.49
Value-priced bearing meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
See More

National – Multi-Purpose Bearing (Part No.MNJ-471-S)

Multi-Purpose Bearing

from

$14.49
Product Features:
  • RIGHT TYPE: Needle bearings are application-specific for the repair occasion, using either caged or full complement designs
  • PREMIUM MATERIALS: Precision manufactured using high-quality materials for outstanding durability and performance
  • OE-STYLE DESIGN: Engineered to meet OE specifications
  • COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
  • RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
See More

Best-Selling 1977 Mercury Cougar Alternator Pigtails

Upgrade your Cougar with one of our 2 best-selling Alternator Pigtails.

Carquest Premium – Multi-Use Connector (Part No.PTA1367)

Multi-Use Connector

from

$3.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
See More

Carquest Premium – Multi-Use Connector (Part No.PTA1348)

Multi-Use Connector

from

$14.99
Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:
  • Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
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Top-Quality Alternator and Generator Brush Parts for 1977 Mercury Cougars

Choose a high-quality OEM or aftermarket Alternator and Generator Brush Part for Mercury Cougars and enjoy top-notch performance from $6.99.

Carquest Premium – Alternator Brush Holder (Part No.XAC1059)

Alternator Brush Holder

from

$8.79
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
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Carquest Premium – Alternator Brush Set (Part No.XAA1043)

Alternator Brush Set

from

$6.99
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
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Our Top Pick for a 1977 Mercury Cougar Drive End Bearing

Invest in a durable Drive End Bearing for your 1977 Mercury, knowing you’re getting trusted brands and expert craftsmanship.

National – Multi-Purpose Bearing (Part No.203)

Multi-Purpose Bearing

from

$19.49
Product Features:
  • BUILT TO LAST: Advanced heat treatment process for strength
  • PREMIUM MATERIALS: Precision manufactured using premium-grade steel for lasting performance and extended bearing life
  • RELIABLE PERFORMANCE: Element size and quantity are engineered to meet or exceed the load rating of OE bearings
  • COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
  • RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
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Top-Rated Alternators for 1977 Mercury Cougars

Make a smart move for your 1977 Mercury Cougar with products all priced from $61.99 to $326.99.

Carquest Premium – Alternator: Remanufactured, 60 Amps, Limited Lifetime Warranty (Part No.7078A)

Alternator: Remanufactured, 60 Amps, Limited Lifetime Warranty

from

$84.99
Carquest Premium alternators are premium constructed, original equipment (O.E.) replacement parts with industry-leading warranties. Our Carquest Premium alternators are designed to meet or exceed OE specifications for fit, form and function. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by a limited warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:
  • Designed to meet or exceed OE specifications for fit, form and function
  • Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
  • Regulators and rectifiers are 100% electronically load tested for reliable charging performance
  • 100% new OE-quality brushes and bearings are used to ensure long service life
  • Rotors and stators are load tested and double insulated for maximum charging performance
  • Slip rings are precision polished for maximum brush contact and service life
  • Application-specific technical bulletins included where applicable
  • All units are 100% triple tested to ensure quality and performance
  • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
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Carquest Standard – Alternator: Remanufactured, 60 Amps, 1 Year Limited Warranty (Part No.7078AV)

Alternator: Remanufactured, 60 Amps, 1 Year Limited Warranty

from

$61.99
Carquest Standard alternators are designed and built to meet original equipment (O.E.) specifications, while providing great value. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. All of our Carquest Standard alternators are inspected and 100% tested to ensure they are built to meet OEM fit, form and function. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:


Product Features:
  • Designed to meet OE specifications for fit, form and function
  • Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
  • Application-specific technical bulletins included where applicable
  • All units are 100% triple tested to ensure quality and performance
  • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
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Carquest Professional – Alternator: New, 100 Amps, Limited Lifetime Warranty (Part No.7705-9AN)

Alternator: New, 100 Amps, Limited Lifetime Warranty

from

$173.99
Carquest Professional alternators are 100% new units that are built to meet or exceed original equipment (O.E.) specifications. Our new alternators are engineered and built by an IATF/TS 16949 certified supplier that meets the highest standards achievable. Carquest Professional alternators are re-engineered to include improvements and enhancements (where applicable) to the OE design to extend longevity and service life. Our new alternators are built with all new components and are 100% triple tested to ensure high quality that is backed by an industry-leading limited warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:


Product Features:
  • Designed to meet or exceed OE specifications for fit, form and function
  • Manufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
  • All new components are utilized to ensure long service life
  • Housings are 100% new with dimensions computer gauged and measured to ensure proper fitment
  • Internal electronics are upgraded for heavy duty reliability (where applicable)
  • Regulators and rectifiers are 100% electronically load tested for reliable charging performance
  • Application-specific technical bulletins included where applicable
  • All units are 100% triple tested to ensure quality and performance
  • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
  • Rotors and stators are load tested and double insulated for maximum charging performance
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Carquest Premium – Alternator: Remanufactured, 70 Amps, Limited Lifetime Warranty (Part No.7072-9A)

Alternator: Remanufactured, 70 Amps, Limited Lifetime Warranty

from

$109.99
The Carquest Premium Alternator is a remanufactured unit designed to deliver reliable performance and long-lasting durability. Engineered to meet or exceed OE quality in fit, form, and function, this alternator is triple-tested to ensure top-notch quality and performance. With a 70-amp output and 12.0 VDC voltage, it is perfectly suited for Ford family vehicles requiring a clockwise rotation. Unlike rebuilt units, this alternator undergoes a meticulous remanufacturing process where all wear components, including brushes, bushings, and bearings, are replaced with brand-new parts. Every unit is 100% performance tested from individual components to final assembly, ensuring dependable service. For added peace of mind, Carquest offers a Tech Hotline staffed by ASE Certified Technicians to assist with any technical inquiries. Choose this alternator for a premium solution that combines exceptional functionality, durability, and value.

Product Features:
  • Each unit is triple-tested to ensure quality and performance
  • All wear components (brushes, bushings, and bearings) are replaced with all NEW components in the remanufacturing process
  • Tech Hotline with trained ASE Certified Technicians: Call Carquest Technical Support at 1-800-228-9672
  • Designed to meet or exceed OE quality standards in fit, form, and function, ensuring compatibility and reliable performance for Ford family vehicles.
  • 100% performance tested from individual components to final assembly, guaranteeing dependable operation and long-lasting service.
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Powermaster Performance – Alternator: 1V-Belt Pulley, 150 Amps, One Or Three Wire, Chrome (Part No.8-37141)

Alternator: 1V-Belt Pulley, 150 Amps, One Or Three Wire, Chrome

from

$326.99
The Alternator with 150 Amps from Powermaster is designed to deliver exceptional performance for street applications, including Muscle Cars, Classics, Street Rods, and daily drivers. Engineered with premium internal components, this alternator ensures maximum efficiency and reliability. Featuring one or three wire operation, it provides flexibility for various setups, while delivering an impressive 70 amperes at idle for consistent power output. The gold battery post enhances durability and corrosion resistance, ensuring long-lasting performance. A proof of performance tag is included for added confidence in its capabilities. This alternator also serves as a bolt-on upgrade for early models, making it an ideal choice for enhancing your vehicle’s electrical system. Whether you’re restoring a classic or upgrading your daily driver, this alternator combines functionality, compatibility, and value to meet your needs.

Product Features:


Product Features:
  • One Or Three Wire Operation
  • 70 Ampere At Idle
  • Gold Battery Post
  • Proof Of Performance Tag
  • Bolt-on Early Model Upgrade
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Powermaster Performance – Alternator: 6 Groove Serpentine, 140 Amp, One Wire or Three Wire, Black (Part No.8-57140)

Alternator: 6 Groove Serpentine, 140 Amp, One Wire or Three Wire, Black

from

$289.99
Elevate your vehicle’s performance with this high-output alternator delivering 140 amps of reliable power. Designed by Powermaster for street applications, it’s the perfect upgrade for Muscle Cars, Classics, Street Rods, and daily drivers. Engineered with premium internal components, this alternator ensures maximum efficiency and durability. Its bolt-on early model upgrade design simplifies installation, while the flexibility of one or three-wire operation caters to various setups. With an impressive 80 amperes at idle, it provides consistent power even at low RPMs. The gold battery post enhances conductivity and durability, and the included Proof of Performance tag guarantees quality you can trust. Whether you’re restoring a classic or enhancing your daily driver, this alternator delivers unmatched functionality and value.

Product Features:


Product Features:
  • Bolt-on Early Model Upgrade
  • One or three wire operation
  • 80 Ampere At Idle
  • Gold Battery Post
  • Proof Of Performance Tag
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Powermaster Performance – Alternator: 1V-Belt Pulley, 150 Amp, One Wire, Natural (Part No.8-47141)

Alternator: 1V-Belt Pulley, 150 Amp, One Wire, Natural

from

$266.99
The 150 Amp Alternator by Powermaster is designed to deliver reliable and efficient performance for street applications, including Muscle Cars, Classics, Street Rods, and daily drivers. Engineered with high-quality internal components, this alternator ensures optimal functionality and long-lasting durability. Its robust construction makes it a dependable choice for enthusiasts seeking consistent power output and compatibility with various vehicle setups. Built to withstand demanding conditions, this alternator offers excellent resistance to water and corrosion, ensuring it performs well over time. Whether you’re upgrading your daily driver or enhancing a classic car, this alternator provides exceptional value and performance to keep your vehicle running smoothly.

Product Features:


Product Features:
  • Most Powerful Starter On The Market
  • 100 Percent New Designed
  • 4.4:1 Gear Reduction Ratio, Cranking Power For Over 18:1 Compression
  • Machined Aluminum Adjustable Block
  • Works With Oversized Kick out Oil Pans
  • Water And Corrosion Resistant
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Carquest Premium – Alternator: Remanufactured, 90 Amps, Limited Lifetime Warranty (Part No.7074-9A)

Alternator: Remanufactured, 90 Amps, Limited Lifetime Warranty

from

$192.99
Carquest Premium alternators are premium constructed, original equipment (O.E.) replacement parts with industry-leading limited warranties. Our Carquest Premium alternators are designed to meet or exceed OE specifications for fit, form and function. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading limited warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:


Product Features:
  • Designed to meet or exceed OE specifications for fit, form and function
  • Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
  • Regulators and rectifiers are 100% electronically load tested for reliable charging performance
  • 100% new OE-quality brushes and bearings are used to ensure long service life
  • Rotors and stators are load tested and double insulated for maximum charging performance
  • Slip rings are precision polished for maximum brush contact and service life
  • Application-specific technical bulletins included where applicable
  • All units are 100% triple tested to ensure quality and performance
  • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
See More

Carquest HD Electrical – Alternator: New, 65 Amps, With Pulley (Part No.71-7078N)

Alternator: New, 65 Amps, With Pulley

from

$139.99
Carquest Starters with 100% NEW construction will restore hard working vehicles to exceed OE specified performance & endurance. All new units and components offer unmatched performance, reduce downtime & customer comebacks. Carquest HD alternators are pri

Product Features:
  • High quality components form the foundation our parts are built from. Transpo’s innovative and high quality electronic technologies for internal components are incorporated to achieve high performance outputs.
  • Power & Efficiency are designed into every component. No matter the ambient temperature, starters will provide maximum cranking power to get engines running.
  • Connectors and power transmission components are highly resistant to extreme moisture environments because we use nickel plated contactors and double armature coating. We maintain a rigorous test schedule with endurance, salt spray, dirt and grime and out
  • Integrated magnetic switch provides protection against weak power from batteries.
  • Over-Crank Protection (OCP) Monitors heat in starter from over cranking & shuts down starter to prevent burning
  • Precision design and machining are the Extreme vibration failure solution. Vehicles often perform in adverse conditions like extreme temperatures that create tolerance shifts that produce high frequency vibration, which leads to resistance in power transf
  • Load dump protection ensures transient voltage spikes do not damage transistor
  • Improved power transmission with lower engine speed keeps accessories and powered implements running at maximum output without additional load to the engine.
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Top-Rated Alternator Part Brands For Your 1977 Mercury Cougar

When it comes to finding the perfect Alternator Part for your 1977 Mercury Cougar, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 6 trusted brands. We carry the most popular Alternator Part brands including Carquest Premium and DriveWorks, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $13.49. Purchasing a Alternator Part from us here at Advance Auto Parts is a smart move for both you and your 1977 Mercury Cougar, providing peace of mind with parts that meet or exceed OEM standards.

Popular Carquest Premium 1977 Mercury Cougar Alternator Parts

If you’re looking for a top-quality Alternator Part for your 1977 Mercury Cougar, Advance Auto Parts has exactly what you need with our selection of Carquest Premium Alternator Parts. We have 1 Carquest Premium Alternator Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $84.99, you’ll find the perfect Alternator Part for your needs and budget. Carquest Premium Alternator Parts for the 1977 Mercury Cougar come highly rated, with over 46 customer reviews and an impressive average rating of 4.4 stars. Choosing a Carquest Premium Alternator Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

Top-Quality DriveWorks 1977 Mercury Cougar Alternator Parts

For those in search of a high-quality Alternator Part for their 1977 Mercury Cougar, Advance Auto Parts offers a great selection of DriveWorks Alternator Parts. With 1 DriveWorks Alternator Parts in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Alternator Parts start at just $13.49, giving you a range of options to suit your budget. Backed by over 7 customer ratings and an average rating of 4.3 stars, DriveWorks Alternator Parts provide both reliability and excellent performance. Choosing a DriveWorks Alternator Part from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Ball Bearing
from $13.49
(7)
Ball Bearing
“fit great”

FAQs for 1977 Mercury Cougar Alternator Parts

What are the best-selling Alternator Parts for 1977 Mercury Cougars?

Out of 16 Alternator Parts that fit 1977 Mercury Cougars, the following parts are the top sellers:

What’s the price range for 1977 Mercury Cougar Alternator Parts?

The prices of Alternator Parts for the 1977 Mercury Cougar range from $3.99 up to $326.99 for the most premium parts.

What is the average price of an Alternator Part for a 1977 Mercury Cougar?

The average price for Alternator Parts for the 1977 Mercury Cougar is $108.13. Keep in mind the variety of part types within our Alternator Part category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Alternator Parts for other Mercury Cougar model years?

Yes, we carry Alternator Parts for 33 model years of Mercury Cougars between 1967 and 2002. The following model years are the most popular for Alternator Part purchases: 2002, 2001, 2000, 1999, 1997, 1996, 1995, 1994, and 1993.

What are the cheapest Alternator Parts for my 1977 Mercury Cougar?

The cheapest 1977 Mercury Cougar Alternator Parts we carry are:

Does Advance Auto Parts sell Alternator Parts for any other 1977 Mercury models?

Yes. We stock Alternator Parts for 5 other popular 1977 Mercury models. Some of the most popular are 1977 Grand Marquis Alternator Parts, 1977 Capri Alternator Parts, 1977 Marquis Alternator Parts, 1977 Comet Alternator Parts, and 1977 Monarch Alternator Parts.

What are the top-rated Alternator Parts that fit the 1977 Mercury Cougar?

The one 1977 Mercury Cougar Alternator Part we have in stock is the Multi-Use Connector. It costs $3.99.

What types of Alternator Parts do you sell for my 1977 Mercury Cougar?

As of 11/2/25, these are some of the most in-demand types of Alternator Parts for a 1977 Mercury Cougar:

Can I get help with 1977 Mercury Cougar Alternator Part orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Alternator Parts and more.

What is your return policy for Mercury Cougar Alternator Parts?

Advance Auto Parts keeps returns simple. For new Mercury Cougar Alternator Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.