2003 Peterbilt 378 Alternator Parts
Keep Your 2003 Peterbilt 378 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 2003 Peterbilt 378 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Alternators. 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.
Competitive Prices and Extensive Inventory
The average price for a 2003 Peterbilt 378 Alternator Part at Advance Auto Parts is around $462.24, with a range that starts at $306.99 and goes up to $604.99. With 14 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Alternator: New, 145 Amps, Alternator: New, 200 Amps, and Alternator: New, 170 Amps, Without Pulley start at just $306.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Alternator Part, don’t forget to check out other key components like Starter Parts. At Advance Auto Parts, we’re here to help you keep your 2003 Peterbilt 378 in peak condition, inside and out.
Find Your Specific 2003 Peterbilt 378 Alternator Parts
Looking for the perfect Alternator Part for your 2003 Peterbilt 378? You’re in the right place. Below, you’ll find links to various types of Alternator Parts that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Alternator Parts, ensuring durability and a precise fit for your Peterbilt 378. Whether you’re driving a 2003 model or another popular model year like
1988,
1993,
1994,
1995,
1996,
1997,
2002,
2005, and
2006, we’ve got you covered. Purchasing Alternator Parts from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Alternator Parts that fit your vehicle.
Essential 2003 Peterbilt 378 Alternator Parts
Carquest HD Electrical – Alternator: New, 130 Amps (Part No.71-7612N)
from
$449.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 200 Amps (Part No.71-12715N)
from
$518.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 160 Amps, Without Pulley (Part No.71-8718N)
from
$329.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 160 Amps (Part No.71-7613N)
from
$532.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 160 Amps, Without Pulley (Part No.71-8329N)
from
$453.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 200 Amps (Part No.71-8743N)
from
$541.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 160 Amps, Without Pulley (Part No.71-8410N)
from
$469.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 160 Amps, Without Pulley (Part No.71-8707N)
from
$451.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 160 Amps (Part No.71-8719N)
from
$383.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 130 Amps (Part No.71-8027N)
from
$315.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 130 Amps (Part No.71-8073N)
from
$321.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 140 Amps (Part No.71-8607N)
from
$604.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 170 Amps, Without Pulley (Part No.71-8612N)
from
$569.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator 33SI IR/EF 135 Amp/12 Volt, Bi-Directional, Neg. Grd., w/o Pulley (Part No.71-8083N)
from
$619.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator IR/IF 200 Amp/12 Volt, CW, w/o Pulley (Part No.71-8741N)
from
$491.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 105 Amps (Part No.71-7940N)
from
$489.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 130 Amps, Without Pulley (Part No.71-7681N)
from
$327.99
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:
See More
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.
Carquest HD Electrical – Alternator: New (Part No.71-7255N)
from
$609.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 145 Amps, Without Pulley (Part No.71-8362N)
from
$383.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 170 Amps, Without Pulley (Part No.71-8614N)
from
$569.99
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:
See More
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.
Product Features:
Carquest HD Electrical – Alternator: New, 145 Amps (Part No.71-8076N)
from
$306.99
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:
See More
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.
Popular 2003 Peterbilt 378 Alternator Parts Categories
Most Popular Alternators for 2003 Peterbilt 378s
Enhance your 2003 Peterbilt 378 with one of the 14 Alternators we have in stock, starting at just $306.99.
Carquest HD Electrical – Alternator: New, 160 Amps, Without Pulley (Part No.71-8329N)
from
$453.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 145 Amps (Part No.71-8076N)
from
$306.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 200 Amps (Part No.71-12715N)
from
$518.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 170 Amps, Without Pulley (Part No.71-8614N)
from
$569.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 160 Amps (Part No.71-7613N)
from
$532.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 160 Amps (Part No.71-8719N)
from
$383.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 170 Amps, Without Pulley (Part No.71-8612N)
from
$569.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 145 Amps, Without Pulley (Part No.71-8362N)
from
$383.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 160 Amps, Without Pulley (Part No.71-8718N)
from
$329.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 130 Amps (Part No.71-8073N)
from
$321.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 140 Amps (Part No.71-8607N)
from
$604.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 200 Amps (Part No.71-8743N)
from
$541.99
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:
See More
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.
Carquest HD Electrical – Alternator IR/IF 200 Amp/12 Volt, CW, w/o Pulley (Part No.71-8741N)
from
$491.99
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:
See More
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.
Carquest HD Electrical – Alternator: New, 130 Amps (Part No.71-7612N)
from
$449.99
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:
See More
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.
FAQs for 2003 Peterbilt 378 Alternator Parts
What are the best-selling Alternator Parts for 2003 Peterbilt 378s?
Out of 14 Alternator Parts that fit 2003 Peterbilt 378s, the following parts are the top sellers:
- Alternator: New, 145 Amps (10897016) – $306.99
- Alternator: New, 200 Amps (11326530) – $518.99
- Alternator: New, 170 Amps, Without Pulley (11092735) – $569.99
What’s the price range for 2003 Peterbilt 378 Alternator Parts?
The prices of Alternator Parts for the 2003 Peterbilt 378 range from $306.99 up to $604.99 for the most premium parts.
What is the average price of an Alternator Part for a 2003 Peterbilt 378?
The average price for Alternator Parts for the 2003 Peterbilt 378 is $462.24. 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 Peterbilt 378 model years?
What are the cheapest Alternator Parts for my 2003 Peterbilt 378?
The cheapest 2003 Peterbilt 378 Alternator Parts we carry are:
- Alternator: New, 145 Amps (10897016) – $306.99
- Alternator: New, 130 Amps (11326534) – $321.99
- Alternator: New, 160 Amps, Without Pulley (11092817) – $329.99
- Alternator: New, 160 Amps (11326852) – $383.99
- Alternator: New, 145 Amps, Without Pulley (11093215) – $383.99
Does Advance Auto Parts sell Alternator Parts for any other 2003 Peterbilt models?
Yes. We stock Alternator Parts for 6 other popular 2003 Peterbilt models. Some of the most popular are 2003 330 Alternator Parts, 2003 320 Alternator Parts, 2003 387 Alternator Parts, 2003 385 Alternator Parts, and 2003 379 Alternator Parts.
What are the top-rated Alternator Parts that fit the 2003 Peterbilt 378?
The one 2003 Peterbilt 378 Alternator Part we have in stock is the Alternator: New, 145 Amps. It costs $306.99.
What types of Alternator Parts do you sell for my 2003 Peterbilt 378?
We currently have just 1 Alternator Part in stock for a 2003 Peterbilt 378, and as of 6/2/26, it is an Alternator.
Can I get help with 2003 Peterbilt 378 Alternator Part orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Peterbilt Alternator Parts and more.
What is your return policy for Peterbilt 378 Alternator Parts?
Advance Auto Parts keeps returns simple. For new Peterbilt 378 Alternator Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.