2003 Peterbilt 378 Serpentine and V Belts
Keep Your 2003 Peterbilt 378 in Top Shape with Quality Serpentine and V Belts
Whether you’re repairing or upgrading your Serpentine and V Belt, 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 V-Belts, Drive Belt Idler Assemblies, and Serpentine Belts. 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 Serpentine and V Belts from Trusted Brands
Looking for a reliable Serpentine and V Belt? We’ve got you covered with options from brands you know and trust like Dayco and DriveWorks. For example, Dayco Serpentine and V Belts start at just $33.49 with an average 4.5 star rating. DriveWorks offer similar pricing and quality, backed by strong customer feedback. With over 24 reviews and a solid 5 star average, you can shop with confidence knowing other Peterbilt 378 owners approve.
Competitive Prices and Extensive Inventory
The average price for a 2003 Peterbilt 378 Serpentine and V Belt at Advance Auto Parts is around $52.54, with a range that starts at $10.49 and goes up to $114.99. With 19 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like Poly Rib Belt Serpentine Belt; 64 Long, 6 Rib Count, FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt, and Bottom Cog V-Belt; 46 Inch Long, Exact Fit Premium Quality start at just $17.49 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Serpentine and V Belt, don’t forget to check out other key components like Belt Tensioners and Pulleys. 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 Serpentine and V Belts
Looking for the perfect Serpentine and V Belt for your 2003 Peterbilt 378? You’re in the right place. Below, you’ll find links to various types of Serpentine and V Belts that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Serpentine and V Belts, ensuring durability and a precise fit for your Peterbilt 378. Whether you’re driving a 2003 model or another popular model year like
1998,
1999,
2000,
2001,
2002,
2004,
2005,
2006, and
2007, we’ve got you covered. Purchasing Serpentine and V Belts 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 Serpentine and V Belts that fit your vehicle.
Essential 2003 Peterbilt 378 Serpentine and V Belts
Dayco – Bottom Cog V-Belt; 49 Inch Long, Exact Fit Premium Quality (Part No.17490)
from
$29.99
Dayco’s high performance HD V-belt is one of the most innovative, top performing belts for its application. By combining raw-edge construction with a specially formulated polyester cord treatment, it offers excellent resistance to repeated flexing and protection against heat, oil and grease as well as the strength, stability and reliability required for vehicles that still need a heavy-duty V-belt.
Product Features:
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Product Features:
- Designed for efficient power transmission to vehicle accessories in today’s trucks and buses
- Provides greater durability and flexibility – 35% stronger than all previous versions
- Features specially treated cords for added strength, stability and reliability
- Made with specially formulated rubber compounds, this belt is highly resistant to extreme under hood temperatures that can cause premature damage to under engineered rubber compounds
Gates – Green Stripe Truck & Bus Series V-Belt (Part No.TR22545)
from
$47.99
Specifically designed for heavy-duty truck, bus and off-road equipment applications. Absorbs normal shock loads without damage to the belt.
Product Features:
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Product Features:
- Molded notches reduce bending stress, especially on small diameter pulleys, while dissipating heat
- High modulus, high strength tensile cord
- Oil and heat-resistant construction throughout
- Meets SAE J636b and SAE J637 specifications
- Meets RMA standards for oil and heat resistance and static conductivity requirements
- NOTE: Some sizes are available as Gates PowerBand V-Belts
Dayco – V-Belt, Top Cog, Dayco (Part No.22570)
from
$23.99
Dayco’s high performance HD V-belt is one of the most innovative, top performing belts for its application. By combining raw-edge construction with a specially formulated polyester cord treatment, it offers excellent resistance to repeated flexing and protection against heat, oil and grease as well as the strength, stability and reliability required for vehicles that still need a heavy-duty V-belt.
Product Features:
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Product Features:
- Designed for efficient power transmission to vehicle accessories in today’s trucks and buses
- Provides greater durability and flexibility 35% stronger than all previous versions
- Features specially treated cords for added strength, stability and reliability
- Made with specially formulated rubber compounds, this belt is highly resistant to extreme under hood temperatures that can cause premature damage to under engineered rubber compounds
Dayco – Poly Rib Belt HD Serpentine Belt; 100.5 Long, 8 Rib Count, Heavy Duty (Part No.5081005)
from
$59.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.
Product Features:
See More
Product Features:
- Engineered to handle operating conditions with temperatures up to 130°C (266°F)
- Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
- Capable of delivering excellent performance in high torque and high power pulse applications
- Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
Driveworks – Automotive V-Belt, Driveworks (Part No.42017)
from
$4.29
The Driveworks V-Belt is manufactured with top quality components to deliver the maximum power and performance on all passenger cars and light duty trucks in service today.
Product Features:
See More
Product Features:
- This belt is made with bottom cogs to provide the maximum flexibility and grip required on v-belt drives
- Polyester cords provide extreme tension-holding capability for longer belt life
- The raw edge belt design delivers the maximum gripping power
- The highly engineered rubber compounds are resistant to under hood heat and ozone deterioration
Gates – Automotive XL High Capacity V-Belt (Part No.9510)
from
$33.49
Replacement belt for the most demanding engine drives. Due to thermal forces, this variable notched belt actually tightens on the drive as it gets hot. This results in improved belt performance by reducing tension decay and noise.
Product Features:
See More
Product Features:
- Fiber-loaded rubber stock adds flexibility along the length of the belt and provides greater lateral stability in the pulley
- Ground to ensure precise dimensional control of the top width and sidewall for proper adjustment to the pulley.
- Thermoactivated pull cords for maintenance-free performance when properly installed and tensioned
- Resists oil, heat, ozone, weather, and decay to improve belt life
- Meets or exceeds SAE J636C specifications
Gates – Automotive XL High Capacity V-Belt (Part No.9560)
from
$26.99
Replacement belt for the most demanding engine drives. Due to thermal forces, this variable notched belt actually tightens on the drive as it gets hot. This results in improved belt performance by reducing tension decay and noise.
Product Features:
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Product Features:
- Fiber-loaded rubber mount adds flexibility along the belt and provides greater lateral stability on the pulley
- Form-ground to ensure precise top width and sidewall dimensional control for proper fit to the pulley
- Thermoactivated pull cords for maintenance-free performance when properly installed and tensioned
- Resists oil, heat, ozone, weather and aging for improved belt life
- Meets or exceeds SAE J636C specifications
Dayco – Bottom Cog V-Belt; 55.5 Inch Long, Exact Fit Premium Quality (Part No.17555)
from
$28.99
Dayco’s high performance HD V-belt is one of the most innovative, top performing belts for its application. By combining raw-edge construction with a specially formulated polyester cord treatment, it offers excellent resistance to repeated flexing and protection against heat, oil and grease as well as the strength, stability and reliability required for vehicles that still need a heavy-duty V-belt.
Product Features:
See More
Product Features:
- Designed for efficient power transmission to vehicle accessories in today’s trucks and buses
- Provides greater durability and flexibility – 35% stronger than all previous versions
- Features specially treated cords for added strength, stability and reliability
Driveworks – Automotive V-Belt, Driveworks (Part No.57017)
from
$4.99
The Driveworks V-Belt is manufactured with top quality components to deliver the maximum power and performance on all passenger cars and light duty trucks in service today.
Product Features:
See More
Product Features:
- This belt is made with bottom cogs to provide the maximum flexibility and grip required on v-belt drives
- Polyester cords provide extreme tension-holding capability for longer belt life
- The raw edge belt design delivers the maximum gripping power
- The highly engineered rubber compounds are resistant to under hood heat and ozone deterioration
Dayco No Slack Gold Label – Serpentine Idler/Tensioner Pulley; Steel, 74mm Dia., 42.6mm Width, Smooth (Part No.89109)
from
$65.99
Designed to replace idler and tensioner pulleys for serpentine drives in heavy-duty diesel engine applications, Dayco HD idler/tensioner pulleys are machined from high-strength steel or powdered metal material to provide excellent wear resistance under harsh environments. Dual pressed-in bearings provide long bearing life and protection against the shock loads experienced by today’s diesel trucks.
Product Features:
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Product Features:
- Engineered for the demanding drive systems of today’s class 4-8 heavy-duty commercial trucks
- Premium OE technology to ensure peak performance under extreme conditions
- Utilizes 3D dimensional computer aided design (CAD) and finite element analysis (FEA) for optimal design and maximum structural integrity
- Meets or exceeds OE quality
Dayco No Slack Gold Label – Serpentine Idler/Tensioner Pulley; Steel, 74mm Dia., 37.5mm Width, 8 Grooves (Part No.89112)
from
$81.99
Designed to replace idler and tensioner pulleys for serpentine drives in heavy-duty diesel engine applications, Dayco HD idler/tensioner pulleys are machined from high-strength steel or powdered metal material to provide excellent wear resistance under harsh environments. Dual pressed-in bearings provide long bearing life and protection against the shock loads experienced by today’s diesel trucks.
Product Features:
See More
Product Features:
- Engineered for the demanding drive systems of today’s class 4-8 heavy-duty commercial trucks
- Premium OE technology to ensure peak performance under extreme conditions
- Utilizes 3D dimensional computer aided design (CAD) and finite element analysis (FEA) for optimal design and maximum structural integrity
- Meets or exceeds OE quality
Dayco No Slack Gold Label – Serpentine Idler/Tensioner Pulley; Steel, 74mm Dia., 38.3mm Width, Smooth (Part No.89111)
from
$86.99
Designed to replace idler and tensioner pulleys for serpentine drives in heavy-duty diesel engine applications, Dayco HD idler/tensioner pulleys are machined from high-strength steel or powdered metal material to provide excellent wear resistance under harsh environments. Dual pressed-in bearings provide long bearing life and protection against the shock loads experienced by today’s diesel trucks.
Product Features:
See More
Product Features:
- Engineered for the demanding drive systems of today’s class 4-8 heavy-duty commercial trucks
- Premium OE technology to ensure peak performance under extreme conditions
- Utilizes 3D dimensional computer aided design (CAD) and finite element analysis (FEA) for optimal design and maximum structural integrity
- Meets or exceeds OE quality
Dayco – Heavy Duty Serpentine Belt; 54.75 Long, 6 Rib Count (Part No.5060548SC)
from
$28.99
Developed using real-world track data, the Dayco supercharger belt is engineered with a proprietary EPDM construction with aramid cords and either 8 or 10 ribs depending on application. This belt is designed for late model high-performance supercharged street cars like ZR1 Corvettes, Shelby Mustangs and SRT Hellcat applications and is part of a line of racing belts engineered to provide maximum performance under the most extreme conditions. Comprised of specially blended compounds that are application specific, these belts are some of the strongest, most flexible belts on the market today.
Product Features:
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Product Features:
- Aramid fiber loaded EPDM construction and high stiffness PET cords eliminate belt stretch
- Proven to provide extreme durability and reduced slip under high boost conditions
- Tested by top level Drag Pak competitors, including Watson Racing, using roots style superchargers
Gates – Micro-V« Serpentine Drive Belt (Part No.K080716)
from
$64.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.
Product Features:
See More
Product Features:
- Special belt construction eliminates belt noise, reduces tension loss and solves problem drive applications
- EPDM rubber constructions resist cracking on the rib surface
- Meets or exceeds all specifications from the Original Equipment Manufacturer
- Tensioner Replacement is Recommended (if equipped)
- Unique form grinding of each individual belt assures precise dimensional control.
- Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
Gates – Micro-V Serpentine Drive Belt (Part No.K050350)
from
$23.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.
Product Features:
See More
Product Features:
- The special belt construction eliminates belt noise, reduces tension loss, and solves problems in drive applications.
- EPDM rubber constructions resist cracking on the surface of the ribs
- Meets or exceeds all specifications from the Original Equipment Manufacturer
- It is recommended to replace the tensioner (if equipped)
- Unique form grinding of each individual belt assures precise dimensional control.
- Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K081005HD)
from
$91.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
See More
Product Features:
- Patented material provides peak performance at prolonged extreme operating temperatures
- Heavy-duty construction resists cracking and wear, even at extreme temperatures
- Special compound provides unmatched flexibility, stability, load carrying capacity and belt life
- Troubleshooting designed for the toughest applications
- Consistently outperforms other heavy-duty serpentine belts on the market
- Designed to save your fleet’s money and reduce downtime
- Tensioner Replacement is Recommended (if equipped)
Dayco – Poly Rib Belt HD Serpentine Belt; 50.59 Long, 8 Rib Count, Heavy Duty (Part No.5080505)
from
$51.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.
Product Features:
See More
Product Features:
- Engineered to handle operating conditions with temperatures up to 130°C (266°F)
- Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
- Capable of delivering excellent performance in high torque and high power pulse applications
- Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K080740HD)
from
$114.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
See More
Product Features:
- Patented material provides peak performance at prolonged extreme operating temperatures
- Crack and wear resistant construction, even in extreme temperatures
- Special compound provides unmatched flexibility, stability, load capacity and belt life
- Troubleshooting designed for the toughest applications
- Consistently outperforms other heavy-duty coil belts on the market
- Designed to save your fleet’s money and reduce downtime
- It is recommended to replace the tensioner (if equipped)
Gates – Micro-V Serpentine Drive Belt (Part No.K120903)
from
$95.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.
Product Features:
See More
Product Features:
- Special belt construction eliminates belt noise, reduces tension loss and solves problem drive applications
- EPDM rubber constructions resist cracking on the surface of the ribs
- Meets or exceeds all original equipment manufacturer specifications.
- It is recommended to replace the tensioner (if equipped)
- Unique form grinding of each individual belt assures precise dimensional control.
- Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K060525HD)
from
$51.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
See More
Product Features:
- The patented material provides optimal performance at prolonged extreme operating temperatures.
- Construction resists cracking and wear, even at extreme temperatures
- Special compound provides unmatched flexibility, stability, load capacity and belt life
- Troubleshooting designed for the toughest applications
- Consistently outperforms other heavy-duty coil belts on the market
- Engineered to save your fleet money and reduce downtime
- It is recommended to replace the tensioner (if equipped)
Gates – Micro-V Serpentine Drive Belt (Part No.K080726)
from
$76.99
We are proud to offer this CARQUEST product line: CARQUEST Premium Serpentine Belts By Gates
Product Features:
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Product Features:
- The special belt construction eliminates belt noise, reduces tension loss, and solves problems in drive applications.
- EPDM rubber constructions resist cracking on the rib surface
- Meets or exceeds all original equipment manufacturer specifications.
- It is recommended to replace the tensioner (if equipped)
Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K100710HD)
from
$144.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
See More
Product Features:
- The patented material provides optimal performance at prolonged extreme operating temperatures.
- Construction resists cracking and wear, even at extreme temperatures
- The special compound provides unprecedented flexibility, stability, load-carrying capacity and belt life.
- A problem-solving tool designed for the toughest applications
- Consistently outperforms other heavy-duty coil belts on the market
- Engineered to save your fleet money and reduce downtime
- It is recommended to replace the tensioner (if equipped)
Dayco – Poly Rib Belt, Premium, Dayco (Part No.5060538)
from
$24.99
Constructed with aramid reinforced EPDM compounds, the Dayco poly-V serpentine belt delivers more than just OE quality. Developed through extensive laboratory and road testing, the rib profile in this EPDM belt has been engineered to conform to high mileage, worn or misaligned drives and helps eliminate noisy belt conditions. Dayco poly rib serpentine belts offer extensive flexibility and longer service life, while handling higher workloads and temperatures.
Product Features:
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Product Features:
- Provides full coverage for today’s light-duty vehicle market, especially vehicles with troublesome drives
- Engineered to help address noise issues caused by the belt drive
- Capable of handling more extreme temperatures and workloads
Dayco – Poly Rib Belt, Premium, Dayco (Part No.5080545)
from
$53.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.
Product Features:
See More
Product Features:
- Engineered to handle operating conditions with temperatures up to 130°C (266°F)
- Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
- Capable of delivering excellent performance in high torque and high power pulse applications
- Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K080730HD)
from
$112.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
See More
Product Features:
- Patented material provides maximum performance at extreme, extended operating temperatures
- Heavy-duty construction resists cracking and wear, even at extreme temperatures
- Special compound provides unmatched flexibility, stability, load capacity and belt life
- Troubleshooting designed for the toughest applications
- Consistently outperforms other heavy-duty serpentine belts on the market
- Engineered to save your fleet money and reduce downtime
- Tensioner Replacement is Recommended (if equipped)
Gates – Micro-V Serpentine Drive Belt (Part No.K081020)
from
$83.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.
Product Features:
See More
Product Features:
- The special belt construction eliminates belt noise, reduces tension loss, and solves problems in drive applications.
- EPDM rubber constructions resist cracking on the rib surface
- Meets or exceeds all original equipment manufacturer specifications.
- Tensioner Replacement is Recommended (if equipped)
- Unique form grinding of each individual belt assures precise dimensional control.
- Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
Dayco – Poly Rib Belt HD Serpentine Belt; 57.09 Long, 8 Rib Count, Heavy Duty (Part No.5080570)
from
$56.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.
Product Features:
See More
Product Features:
- Engineered to handle operating conditions with temperatures up to 130°C (266°F)
- Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
- Capable of delivering excellent performance in high torque and high power pulse applications
- Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
Dayco – Poly Rib Belt Serpentine Belt; 68.5 Long, 6 Rib Count (Part No.5060685)
from
$46.99
Constructed with aramid reinforced EPDM compounds, the Dayco poly-V serpentine belt delivers more than just OE quality. Developed through extensive laboratory and road testing, the rib profile in this EPDM belt has been engineered to conform to high mile
Product Features:
See More
Product Features:
- Provides full coverage for today’s light-duty vehicle market, especially vehicles with troublesome drives
- Engineered to help address noise issues caused by the belt drive
- Capable of handling more extreme temperatures and workloads
Popular 2003 Peterbilt 378 Serpentine and V Belts Categories
Most Popular V-Belts for 2003 Peterbilt 378s
Enhance your 2003 Peterbilt 378 with one of the 7 V-Belts we have in stock, starting at just $10.49.
Dayco – Bottom Cog V-Belt; 46 Inch Long, Exact Fit Premium Quality (Part No.17460)
from
$17.49
Dayco’s high performance HD V-belt is one of the most innovative, top performing belts for its application. By combining raw-edge construction with a specially formulated polyester cord treatment, it offers excellent resistance to repeated flexing and protection against heat, oil and grease as well as the strength, stability and reliability required for vehicles that still need a heavy-duty V-belt.
Product Features:
See More
Product Features:
- Designed for efficient power transmission to vehicle accessories in today’s trucks and buses
- Provides greater durability and flexibility – 35% stronger than all previous versions
- Features specially treated cords for added strength, stability and reliability
- Made with specially formulated rubber compounds, this belt is highly resistant to extreme under hood temperatures that can cause premature damage to under engineered rubber compounds
Gates – FleetRunner Heavy-Duty V-Belt (Part No.9590HD)
from
$40.99
Designed for the toughest applications, FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
See More
Product Features:
- Patented material provides peak performance at extremely prolonged operating temperatures
- Crack, wear, oil, and heat resistant construction
- Special compound provides unmatched stability, load carrying capacity and belt life
- Unique undercord notch pattern offers increased flexibility for smaller diameter pulleys
- Troubleshooter for troubled drives
- Designed to save your fleet’s money and reduce downtime
- Meets RMA oil and heat resistance standards and static conductivity requirements
Gates – Green Stripe Truck & Bus Series V-Belt (Part No.TR22553)
from
$46.99
Specifically designed for heavy-duty truck, bus and off-road equipment applications. Absorbs normal shock loads without damage to the belt.
Product Features:
See More
Product Features:
- Molded notches reduce bending stresses, especially on small-diameter pulleys, while dissipating heat.
- High modulus, high strength tensile cord
- Oil and heat resistant construction
- Meets SAE J636b and SAE J637 specifications
- Meets RMA standards for oil and heat resistance and static conductivity requirements
- NOTE: Some sizes available as Gates PowerBand joined V-belts
Gates – FleetRunner Heavy-Duty V-Belt (Part No.9463HD)
from
$40.99
Designed for the toughest applications, FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
See More
Product Features:
- The patented material provides optimal performance at extremely high operating temperatures.
- Heavy-duty construction resists cracking, wear, oil and heat
- The special compound provides unprecedented flexibility, stability, load-bearing capacity and belt life.
- Unique notch pattern offers greater flexibility for smaller diameter pulleys
- Troubleshooter for troubled drives
- Designed to save your fleet’s money and reduce downtime
- Meets RMA oil and heat resistant standards and static conductivity requirements
Gates – Automotive XL High Capacity V-Belt (Part No.9463)
from
$29.99
Replacement belt for the most demanding engine drives. Due to thermal forces, this variable notched belt actually tightens on the drive as it gets hot. This results in improved belt performance by reducing tension decay and noise.
Product Features:
See More
Product Features:
- The fiber-filled rubber adds flexibility along the entire length of the belt and provides greater lateral stability in the pulley.
- Ground to ensure precise dimensional control of the top width and sidewall for proper adjustment to the pulley.
- Thermally active pull cords for maintenance-free operation when the strap is properly installed and tensioned
- Resistant to oil, heat, ozone, weathering, and aging for better belt life.
- Meets or exceeds SAE J636C specifications
Gates – Automotive XL High Capacity V-Belt (Part No.9590)
from
$24.49
Replacement belt for the most demanding engine drives. Due to thermal forces, this variable notched belt actually tightens on the drive as it gets hot. This results in improved belt performance by reducing tension decay and noise.
Product Features:
See More
Product Features:
- Fiber-loaded rubber stock adds flexibility along the length of the belt and provides greater lateral stability in the pulley
- The shape is ground to ensure precise dimensional control of the top width and sidewall for a correct fit to the pulley.
- Thermally-active tensile cords for maintenance-free performance when properly installed and tensioned
- Resists oil, heat, ozone, weather and aging for improved belt life
- Meets or exceeds SAE J636C specifications
Driveworks – Automotive V-Belt, Driveworks (Part No.46017)
from
$10.49
The Driveworks V-Belt is manufactured with top quality components to deliver the maximum power and performance on all passenger cars and light duty trucks in service today.
Product Features:
See More
Product Features:
- This belt is made with bottom cogs to provide the maximum flexibility and grip required on v-belt drives
- Polyester cords provide extreme tension-holding capability for longer belt life
- The raw edge belt design delivers the maximum gripping power
- The highly engineered rubber compounds are resistant to under hood heat and ozone deterioration
Best-Selling 2003 Peterbilt 378 Drive Belt Idler Assembly
Upgrade your 378 with our best-selling Drive Belt Idler Assembly.
Dayco No Slack Gold Label – Serpentine Idler/Tensioner Pulley; Steel, 74mm Dia., 38.3mm Width, Smooth (Part No.89111)
from
$86.99
Designed to replace idler and tensioner pulleys for serpentine drives in heavy-duty diesel engine applications, Dayco HD idler/tensioner pulleys are machined from high-strength steel or powdered metal material to provide excellent wear resistance under harsh environments. Dual pressed-in bearings provide long bearing life and protection against the shock loads experienced by today’s diesel trucks.
Product Features:
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Product Features:
- Engineered for the demanding drive systems of today’s class 4-8 heavy-duty commercial trucks
- Premium OE technology to ensure peak performance under extreme conditions
- Utilizes 3D dimensional computer aided design (CAD) and finite element analysis (FEA) for optimal design and maximum structural integrity
- Meets or exceeds OE quality
Top-Quality Serpentine Belts for 2003 Peterbilt 378s
Choose a high-quality OEM or aftermarket Serpentine Belt for Peterbilt 378s and enjoy top-notch performance from $18.79.
Dayco – Poly Rib Belt, Premium, Dayco (Part No.5080725)
from
$65.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.
Product Features:
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Product Features:
- Engineered to handle operating conditions with temperatures up to 130°C (266°F)
- Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
- Capable of delivering excellent performance in high torque and high power pulse applications
- Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
Dayco – Poly Rib Belt Serpentine Belt; 64 Long, 6 Rib Count (Part No.5060640)
from
$33.49
Constructed with aramid reinforced EPDM compounds, the Dayco poly-V serpentine belt delivers more than just OE quality. Developed through extensive laboratory and road testing, the rib profile in this EPDM belt has been engineered to conform to high mile
Product Features:
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Product Features:
- Provides full coverage for today’s light-duty vehicle market, especially vehicles with troublesome drives
- Engineered to help address noise issues caused by the belt drive
- Capable of handling more extreme temperatures and workloads
Driveworks – Poly Rib Belt Serpentine Belt; 64 Long, 6 Rib Count (Part No.640K6)
from
$18.79
The Driveworks belt is designed to provide better belt-to-pulley contact. The specialized rubber compound incorporates a high temperature polymer formulated to maximize load carrying requirements and belt life. This Driveworks ribbed belt has been constructed and engineered to meet the stringent demands of today’s automotive drive systems. The Driveworks ribbed belt delivers long-lasting dependable belt life.
Product Features:
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Product Features:
- Constructed with heat and ozone resistant EPDM rubber
- Fiber is added to the rib stock to reinforce the rubber and reduce noise from worn and misaligned pulleys
- Made with treated polyester cord to reduce belt stretch
Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K080991HD)
from
$85.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
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Product Features:
- The patented material provides optimal performance at prolonged extreme operating temperatures.
- Heavy-duty construction resists cracking and wear, even at extreme temperatures
- Special compound provides unmatched flexibility, stability, load carrying capacity and belt life
- A problem-solving tool designed for the toughest applications
- Consistently outperforms other heavy-duty serpentine belts on the market
- Engineered to save your fleet money and reduce downtime
- Tensioner Replacement is Recommended (if equipped)
Dayco – Poly Rib Belt, Premium, Dayco (Part No.5120910)
from
$90.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.
Product Features:
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Product Features:
- Engineered to handle operating conditions with temperatures up to 130°C (266°F)
- Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
- Capable of delivering excellent performance in high torque and high power pulse applications
- Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K060525HD)
from
$51.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
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Product Features:
- The patented material provides optimal performance at prolonged extreme operating temperatures.
- Construction resists cracking and wear, even at extreme temperatures
- Special compound provides unmatched flexibility, stability, load capacity and belt life
- Troubleshooting designed for the toughest applications
- Consistently outperforms other heavy-duty coil belts on the market
- Engineered to save your fleet money and reduce downtime
- It is recommended to replace the tensioner (if equipped)
Dayco – Poly Rib Belt HD Serpentine Belt; 74.02 Long, 8 Rib Count, Heavy Duty (Part No.5080740)
from
$63.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.
Product Features:
See More
Product Features:
- Engineered to handle operating conditions with temperatures up to 130°C (266°F)
- Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
- Capable of delivering excellent performance in high torque and high power pulse applications
- Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
Dayco – Poly Rib Belt HD Serpentine Belt; 71.06 Long, 8 Rib Count, Heavy Duty (Part No.5080710)
from
$62.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.
Product Features:
See More
Product Features:
- Engineered to handle operating conditions with temperatures up to 130°C (266°F)
- Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
- Capable of delivering excellent performance in high torque and high power pulse applications
- Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
Gates – Micro-V Serpentine Drive Belt (Part No.K080991)
from
$38.49
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.
Product Features:
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Product Features:
- Special belt construction eliminates belt noise, reduces tension loss and solves problem drive applications
- EPDM rubber constructions resist cracking on the rib surface
- Meets or exceeds all original equipment manufacturer specifications.
- Replacement of the tensioner is recommended (if equipped)
- Unique form grinding of each individual belt assures precise dimensional control.
- Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K080740HD)
from
$114.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.
Product Features:
See More
Product Features:
- Patented material provides peak performance at prolonged extreme operating temperatures
- Crack and wear resistant construction, even in extreme temperatures
- Special compound provides unmatched flexibility, stability, load capacity and belt life
- Troubleshooting designed for the toughest applications
- Consistently outperforms other heavy-duty coil belts on the market
- Designed to save your fleet’s money and reduce downtime
- It is recommended to replace the tensioner (if equipped)
Gates – Micro-V Serpentine Drive Belt (Part No.K080740)
from
$68.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.
Product Features:
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Product Features:
- The special belt construction eliminates noise, reduces tension loss and solves transmission problems.
- EPDM rubber constructions resist cracking on the rib surface
- Meets or exceeds all original equipment manufacturer specifications.
- It is recommended to replace the tensioner (if equipped)
- Unique form grinding of each individual belt assures precise dimensional control.
- Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
Top-Rated Serpentine and V Belt Brands For Your 2003 Peterbilt 378
When it comes to finding the perfect Serpentine and V Belt for your 2003 Peterbilt 378, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 3 trusted brands. We carry the most popular Serpentine and V Belt brands including Dayco and DriveWorks, and more, all known for their exceptional customer ratings (average brand rating of 4.5 stars) and competitive prices, as low as $18.79. Purchasing a Serpentine and V Belt from us here at Advance Auto Parts is a smart move for both you and your 2003 Peterbilt 378, providing peace of mind with parts that meet or exceed OEM standards.
Popular Dayco 2003 Peterbilt 378 Serpentine and V Belts
If you’re looking for a top-quality Serpentine and V Belt for your 2003 Peterbilt 378, Advance Auto Parts has exactly what you need with our selection of Dayco Serpentine and V Belts. We have 2 Dayco Serpentine and V Belts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $33.49 and an average cost of $49.74, you’ll find the perfect Serpentine and V Belt for your needs and budget. Dayco Serpentine and V Belts for the 2003 Peterbilt 378 come highly rated, with over 18 customer reviews and an impressive average rating of 4.5 stars. Choosing a Dayco Serpentine and V Belt from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Top-Quality DriveWorks 2003 Peterbilt 378 Serpentine and V Belts
For those in search of a high-quality Serpentine and V Belt for their 2003 Peterbilt 378, Advance Auto Parts offers a great selection of DriveWorks Serpentine and V Belts. With 1 DriveWorks Serpentine and V Belts in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Serpentine and V Belts start at just $18.79, giving you a range of options to suit your budget. Backed by over 4 customer ratings and an average rating of 4.3 stars, DriveWorks Serpentine and V Belts provide both reliability and excellent performance. Choosing a DriveWorks Serpentine and V Belt from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
from
$18.79
(4)
Poly Rib Belt Serpentine Belt; 64 Long, 6 Rib Count
“The parts were ready for me when I arrived to pick them and they fit fine.”
FAQs for 2003 Peterbilt 378 Serpentine and V Belts
What are the best-selling Serpentine and V Belts for 2003 Peterbilt 378s?
Out of 19 Serpentine and V Belts that fit 2003 Peterbilt 378s, the following parts are the top sellers:
- Poly Rib Belt Serpentine Belt; 64 Long, 6 Rib Count (5061717) – $18.79
- FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (10913655) – $85.99
- Bottom Cog V-Belt; 46 Inch Long, Exact Fit Premium Quality (3300112) – $17.49
What’s the price range for 2003 Peterbilt 378 Serpentine and V Belts?
The prices of Serpentine and V Belts for the 2003 Peterbilt 378 range from $10.49 up to $114.99 for the most premium parts.
What is the average price of a Serpentine and V Belt for a 2003 Peterbilt 378?
The average price for Serpentine and V Belts for the 2003 Peterbilt 378 is $52.54. Keep in mind the variety of part types within our Serpentine and V Belt category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Serpentine and V Belts for other Peterbilt 378 model years?
What are the cheapest Serpentine and V Belts for my 2003 Peterbilt 378?
The cheapest 2003 Peterbilt 378 Serpentine and V Belts we carry are:
- Automotive V-Belt, Driveworks (5064597) – $10.49
- Bottom Cog V-Belt; 46 Inch Long, Exact Fit Premium Quality (3300112) – $17.49
- Poly Rib Belt Serpentine Belt; 64 Long, 6 Rib Count (5061717) – $18.79
- Automotive XL High Capacity V-Belt (11513792) – $24.49
- Automotive XL High Capacity V-Belt (11520430) – $29.99
Does Advance Auto Parts sell Serpentine and V Belts for any other 2003 Peterbilt models?
Yes. We stock Serpentine and V Belts for 6 other popular 2003 Peterbilt models. Some of the most popular are 2003 387 Serpentine and V Belts, 2003 379 Serpentine and V Belts, 2003 330 Serpentine and V Belts, 2003 357 Serpentine and V Belts, and 2003 385 Serpentine and V Belts.
What are the top-rated Serpentine and V Belts that fit the 2003 Peterbilt 378?
The one 2003 Peterbilt 378 Serpentine and V Belt we have in stock is the Automotive V-Belt, Driveworks. It costs $10.49.
What types of Serpentine and V Belts do you sell for my 2003 Peterbilt 378?
As of 11/2/25, these are some of the most in-demand types of Serpentine and V Belts for a 2003 Peterbilt 378:
Can I get help with 2003 Peterbilt 378 Serpentine and V Belt orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Peterbilt Serpentine and V Belts and more.
What is your return policy for Peterbilt 378 Serpentine and V Belts?
Advance Auto Parts keeps returns simple. For new Peterbilt 378 Serpentine and V Belts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.