1977 Mercury Comet Alternator Parts

Keep Your 1977 Mercury Comet 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 Comet looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Alternator Pigtails, Alternators, 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. For example, Carquest Premium Alternator Parts start at just $84.99 with an average 4.4 star rating. With over 242 reviews and a solid 3 star average, you can shop with confidence knowing other Mercury Comet owners approve.

Explore Related Parts

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

Essential 1977 Mercury Comet Alternator Parts

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.
See More

Carquest Premium – Alternator: Remanufactured, 55 Amps, Limited Lifetime Warranty (Part No.7058A)

Alternator: Remanufactured, 55 Amps, Limited Lifetime Warranty

from

$82.99
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

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
See More

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
See More

Carquest HD Electrical – Alternator: New, 65 Amps, With Pulley (Part No.71-7058N)

Alternator: New, 65 Amps, With Pulley

from

$130.99
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, 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
See More

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

Alternator: Remanufactured, 60 Amps, Limited Lifetime Warranty

from

$97.99
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 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 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 – 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.XAA1028)

Alternator Brush Set

from

$12.99
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.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.
See More

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
See More

Most Popular Alternator Pigtails for 1977 Mercury Comets

Enhance your 1977 Mercury Comet with one of the 2 Alternator Pigtails we have in stock, starting at just $3.99.

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
See More

Best-Selling 1977 Mercury Comet Alternators

Upgrade your Comet with one of our 6 best-selling Alternators, earning an average 4.33 stars rating across 80 reviews.

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

Alternator: Remanufactured, 60 Amps, Limited Lifetime Warranty

from

$97.99
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 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
See More

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
See More

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
See More

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
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.
See More

Top-Quality Alternator and Generator Brush Parts for 1977 Mercury Comets

Choose a high-quality OEM or aftermarket Alternator and Generator Brush Part for Mercury Comets 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.
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

Our Top Pick for a 1977 Mercury Comet 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
See More

Top-Rated Alternator Part Brands For Your 1977 Mercury Comet

When it comes to finding the perfect Alternator Part for your 1977 Mercury Comet, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 4 trusted brands. We carry the most popular Alternator Part brands including Carquest Premium, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $84.99. Purchasing a Alternator Part from us here at Advance Auto Parts is a smart move for both you and your 1977 Mercury Comet, providing peace of mind with parts that meet or exceed OEM standards.

Popular Carquest Premium 1977 Mercury Comet Alternator Parts

If you’re looking for a top-quality Alternator Part for your 1977 Mercury Comet, Advance Auto Parts has exactly what you need with our selection of Carquest Premium Alternator Parts. We have 2 Carquest Premium Alternator Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $84.99 and an average cost of $91.49, you’ll find the perfect Alternator Part for your needs and budget. Carquest Premium Alternator Parts for the 1977 Mercury Comet come highly rated, with over 47 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.
Alternator: Remanufactured, 60 Amps, Limited Lifetime Warranty
from $97.99
(1)
Alternator: Remanufactured, 60 Amps, Limited Lifetime Warranty
“Easy to order and good price.”

FAQs for 1977 Mercury Comet Alternator Parts

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

Out of 11 Alternator Parts that fit 1977 Mercury Comets, the following parts are the top sellers:

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

The prices of Alternator Parts for the 1977 Mercury Comet 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 Comet?

The average price for Alternator Parts for the 1977 Mercury Comet is $95.96. 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 Comet model years?

Yes, we carry Alternator Parts for 15 model years of Mercury Comets between 1960 and 1976. The following model years are the most popular for Alternator Part purchases: 1976, 1975, 1974, 1973, 1972, 1971, 1969, 1968, and 1967.

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

The cheapest 1977 Mercury Comet 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 Cougar Alternator Parts, 1977 Grand Marquis Alternator Parts, 1977 Capri Alternator Parts, 1977 Marquis Alternator Parts, and 1977 Monarch Alternator Parts.

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

The one 1977 Mercury Comet 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 Comet?

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

Can I get help with 1977 Mercury Comet 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 Comet Alternator Parts?

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