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2003 Peterbilt 378 Parts
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![FleetRunner Micro-V Serpentine Belt for Select 1990-2007 Peterbilt and Other Makes [6-Rib, 53.328 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-k060525hd.jpg)
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FleetRunner Micro-V Serpentine Belt for Select 1990-2007 Peterbilt and Other Makes [6-Rib, 53.328 in. Outside Circumference]
Part Number: 465-K060525HD
$7254
Ships on Oct 13, 2026
Lowest price guarantee![FleetRunner Micro-V Serpentine Belt for Select 1990-2007 Peterbilt and Other Makes [6-Rib, 53.328 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-k060525hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for Select 1990-2007 Peterbilt and Other Makes [6-Rib, 53.328 in. Outside Circumference]
Part Number: 465-K060525HD
Ships on Oct 13, 2026Lowest Price Guarantee$7254
![Micro-V Serpentine Belt for Select 1997-2015 Ford, Freightliner and Other Makes [8-Rib, 99.650 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-k080991.jpg)
GATES
Micro-V Serpentine Belt for Select 1997-2015 Ford, Freightliner and Other Makes [8-Rib, 99.650 in. Outside Circumference]
Part Number: 465-K080991
$11640
Ships on Oct 13, 2026Lowest price guarantee![Micro-V Serpentine Belt for Select 1997-2015 Ford, Freightliner and Other Makes [8-Rib, 99.650 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-k080991.jpg)
GATES
Micro-V Serpentine Belt for Select 1997-2015 Ford, Freightliner and Other Makes [8-Rib, 99.650 in. Outside Circumference]
Part Number: 465-K080991
Ships on Oct 13, 2026Lowest Price Guarantee$11640
![Micro-V Serpentine Belt for Select 1989-2010 Freightliner and Other Makes [8-Rib, 74.660 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-k080740.jpg)
GATES
Micro-V Serpentine Belt for Select 1989-2010 Freightliner and Other Makes [8-Rib, 74.660 in. Outside Circumference]
Part Number: 465-K080740
$9820
Ships on Oct 13, 2026Lowest price guarantee![Micro-V Serpentine Belt for Select 1989-2010 Freightliner and Other Makes [8-Rib, 74.660 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-k080740.jpg)
GATES
Micro-V Serpentine Belt for Select 1989-2010 Freightliner and Other Makes [8-Rib, 74.660 in. Outside Circumference]
Part Number: 465-K080740
Ships on Oct 13, 2026Lowest Price Guarantee$9820
![Heavy Duty Truck V-Belt for Select 1981-2004 Hino, Peterbilt and Other Makes [RA Section, 55.910 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-tr22553.jpg)
GATES
Heavy Duty Truck V-Belt for Select 1981-2004 Hino, Peterbilt and Other Makes [RA Section, 55.910 in. Outside Circumference]
Part Number: 465-TR22553
$6743
Ships on Oct 13, 2026Lowest price guarantee![Heavy Duty Truck V-Belt for Select 1981-2004 Hino, Peterbilt and Other Makes [RA Section, 55.910 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-tr22553.jpg)
GATES
Heavy Duty Truck V-Belt for Select 1981-2004 Hino, Peterbilt and Other Makes [RA Section, 55.910 in. Outside Circumference]
Part Number: 465-TR22553
Ships on Oct 13, 2026Lowest Price Guarantee$6743
![Heavy Duty Belt Tensioner for Select 1990-2006 Freightliner, Ford and Other Makes [75 mm Pulley O.D.]](https://www.jegs.com/images/mini_100/400/465/465-38506.jpg)
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Heavy Duty Belt Tensioner for Select 1990-2006 Freightliner, Ford and Other Makes [75 mm Pulley O.D.]
Part Number: 465-38506
$28787
Ships on Oct 13, 2026Lowest price guarantee![Heavy Duty Belt Tensioner for Select 1990-2006 Freightliner, Ford and Other Makes [75 mm Pulley O.D.]](https://www.jegs.com/images/mini_200/400/465/465-38506.jpg)
GATES
Heavy Duty Belt Tensioner for Select 1990-2006 Freightliner, Ford and Other Makes [75 mm Pulley O.D.]
Part Number: 465-38506
Ships on Oct 13, 2026Lowest Price Guarantee$28787
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DriveAlign Idler Pulley for Select 1988-2012 International, Freightliner and Other Makes
Part Number: 465-36091
$7833
Ships on Oct 13, 2026Lowest price guarantee
GATES
DriveAlign Idler Pulley for Select 1988-2012 International, Freightliner and Other Makes
Part Number: 465-36091
Ships on Oct 13, 2026Lowest Price Guarantee$7833
![Heavy-Duty Thermostat for Select 1965-2011 International, Ford and Other Makes [180 Degree F]](https://www.jegs.com/images/mini_100/400/465/465-33578.jpg)
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Heavy-Duty Thermostat for Select 1965-2011 International, Ford and Other Makes [180 Degree F]
Part Number: 465-33578
$10738
Ships on Oct 13, 2026Lowest price guarantee![Heavy-Duty Thermostat for Select 1965-2011 International, Ford and Other Makes [180 Degree F]](https://www.jegs.com/images/mini_200/400/465/465-33578.jpg)
GATES
Heavy-Duty Thermostat for Select 1965-2011 International, Ford and Other Makes [180 Degree F]
Part Number: 465-33578
Ships on Oct 13, 2026Lowest Price Guarantee$10738
GATES
Heavy-Duty Thermostat for Select 1965-2017 International, Ford and Other Makes
Part Number: 465-33579
$11864
Ships on Oct 13, 2026Lowest price guarantee
GATES
Heavy-Duty Thermostat for Select 1965-2017 International, Ford and Other Makes
Part Number: 465-33579
Ships on Oct 13, 2026Lowest Price Guarantee$11864
GATES
Heavy-Duty Water Pump for Select 1988-2018 Freightliner, Ford and Other Makes
Part Number: 465-46002HD
$62376
Ships on Oct 13, 2026Lowest price guarantee
GATES
Heavy-Duty Water Pump for Select 1988-2018 Freightliner, Ford and Other Makes
Part Number: 465-46002HD
Ships on Oct 13, 2026Lowest Price Guarantee$62376
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Heavy-Duty Water Pump for Select 1994-2005 Sterling Truck, Freightliner and Other Makes
Part Number: 465-44060HD
$62379
Ships on Oct 13, 2026Lowest price guarantee
GATES
Heavy-Duty Water Pump for Select 1994-2005 Sterling Truck, Freightliner and Other Makes
Part Number: 465-44060HD
Ships on Oct 13, 2026Lowest Price Guarantee$62379
![FleetRunner V-Belt for Select 1956-2010 Ford, Peterbilt and Other Makes [HC50 Section, 46.380 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-9463hd.jpg)
GATES
FleetRunner V-Belt for Select 1956-2010 Ford, Peterbilt and Other Makes [HC50 Section, 46.380 in. Outside Circumference]
Part Number: 465-9463HD
$6200
Ships on Oct 13, 2026Lowest price guarantee![FleetRunner V-Belt for Select 1956-2010 Ford, Peterbilt and Other Makes [HC50 Section, 46.380 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-9463hd.jpg)
GATES
FleetRunner V-Belt for Select 1956-2010 Ford, Peterbilt and Other Makes [HC50 Section, 46.380 in. Outside Circumference]
Part Number: 465-9463HD
Ships on Oct 13, 2026Lowest Price Guarantee$6200
GATES
FleetRunner Heavy Duty V Belt for Select 1960-1987 Chevrolet, Dodge, Ford, Isuzu, Nissan
Part Number: 465-9590HD
$2866
Ships on Oct 13, 2026Lowest price guarantee
GATES
FleetRunner Heavy Duty V Belt for Select 1960-1987 Chevrolet, Dodge, Ford, Isuzu, Nissan
Part Number: 465-9590HD
Ships on Oct 13, 2026Lowest Price Guarantee$2866
![FleetRunner Micro-V Serpentine Belt for Select 1997-2015 Ford, Freightliner and Other Makes [8-Rib]](https://www.jegs.com/images/mini_100/400/465/465-k080991hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for Select 1997-2015 Ford, Freightliner and Other Makes [8-Rib]
Part Number: 465-K080991HD
$5867$76.79
YOU SAVE
$18.12Ships TomorrowLowest price guarantee![FleetRunner Micro-V Serpentine Belt for Select 1997-2015 Ford, Freightliner and Other Makes [8-Rib]](https://www.jegs.com/images/mini_200/400/465/465-k080991hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for Select 1997-2015 Ford, Freightliner and Other Makes [8-Rib]
Part Number: 465-K080991HD
Ships TomorrowLowest Price Guarantee$5867 $76.79
YOU SAVE
$18.12
UNITED PACIFIC
31088 ULTRALIT High Power LED 4 in. x 6 in. Low Beam Headlight With Polycarbonate Lens & Housing
Part Number: 953-31088
$6799
Ships on 10/21/2026Lowest price guarantee
UNITED PACIFIC
31088 ULTRALIT High Power LED 4 in. x 6 in. Low Beam Headlight With Polycarbonate Lens & Housing
Part Number: 953-31088
Ships on 10/21/2026Lowest Price Guarantee$6799
