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2004 Peterbilt 378 Parts
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GOODYEAR BELTS
1060540 Serpentine Belt, Fits Select Makes/Models, K Profile, 6 Ribs, 54 in. Effective Length
Part Number: 498-1060540
$2081
Ships on 10/13/2026
Lowest price guarantee
GOODYEAR BELTS
1060540 Serpentine Belt, Fits Select Makes/Models, K Profile, 6 Ribs, 54 in. Effective Length
Part Number: 498-1060540
Ships on 10/13/2026Lowest Price Guarantee$2081
GOODYEAR BELTS
1080730 Serpentine Belt, Select Sterling Truck; Freightliner; Peterbilt; International, 8 Ribs, 73 in. Effective Length
Part Number: 498-1080730
$4157$66.29
YOU SAVE
$24.72Ships TomorrowLowest price guarantee
GOODYEAR BELTS
1080730 Serpentine Belt, Select Sterling Truck; Freightliner; Peterbilt; International, 8 Ribs, 73 in. Effective Length
Part Number: 498-1080730
Ships TomorrowLowest Price Guarantee$4157 $66.29
YOU SAVE
$24.72
GOODYEAR BELTS
1115 Coolant Straight Hose,2.5in. I.D, 36 in. Length Fits Select Make/Models
Part Number: 498-1115
$9786
Ships on 10/15/2026Lowest price guarantee
GOODYEAR BELTS
1115 Coolant Straight Hose,2.5in. I.D, 36 in. Length Fits Select Make/Models
Part Number: 498-1115
Ships on 10/15/2026Lowest Price Guarantee$9786
GOODYEAR BELTS
1120891 Serpentine Belt, 2004-2007 Peterbilt 378, 2005-2007 Peterbilt 379, K Profile, 12 Ribs, 89.1 in. Effective Length
Part Number: 498-1120891
$6756
Ships on 10/13/2026Lowest price guarantee
GOODYEAR BELTS
1120891 Serpentine Belt, 2004-2007 Peterbilt 378, 2005-2007 Peterbilt 379, K Profile, 12 Ribs, 89.1 in. Effective Length
Part Number: 498-1120891
Ships on 10/13/2026Lowest Price Guarantee$6756
GOODYEAR BELTS
1120903 Serpentine Belt, Select Pierce Mfg. Inc.; Peterbilt; International, 12 Ribs, 90.3 in. Effective Length
Part Number: 498-1120903
$5261
Ships on 10/13/2026Lowest price guarantee
GOODYEAR BELTS
1120903 Serpentine Belt, Select Pierce Mfg. Inc.; Peterbilt; International, 12 Ribs, 90.3 in. Effective Length
Part Number: 498-1120903
Ships on 10/13/2026Lowest Price Guarantee$5261
GOODYEAR BELTS
57449 Belt Drive Idler/Tensioner Pulley Select Autocar LLC.; Chevy; Kenworth; Peterbilt; International
Part Number: 498-57449
$2988
Ships on 10/13/2026Lowest price guarantee
GOODYEAR BELTS
57449 Belt Drive Idler/Tensioner Pulley Select Autocar LLC.; Chevy; Kenworth; Peterbilt; International
Part Number: 498-57449
Ships on 10/13/2026Lowest Price Guarantee$2988
GOODYEAR BELTS
55161 Automatic Drive Belt Tensioner Select Western Star; Volvo; Mack; Freightliner; Kenworth; Peterbilt; International
Part Number: 498-55161
$13417$213.79
YOU SAVE
$79.62Ships TomorrowLowest price guarantee
GOODYEAR BELTS
55161 Automatic Drive Belt Tensioner Select Western Star; Volvo; Mack; Freightliner; Kenworth; Peterbilt; International
Part Number: 498-55161
Ships TomorrowLowest Price Guarantee$13417 $213.79
YOU SAVE
$79.62
GOODYEAR BELTS
55827 Automatic Drive Belt Tensioner Fits Select Make/Models
Part Number: 498-55827
$14277$227.48
YOU SAVE
$84.71Ships TomorrowLowest price guarantee
GOODYEAR BELTS
55827 Automatic Drive Belt Tensioner Fits Select Make/Models
Part Number: 498-55827
Ships TomorrowLowest Price Guarantee$14277 $227.48
YOU SAVE
$84.71
HPS PERFORMANCE
CAC-3687223 EGR Hose, 4-Ply Aramid Reinforced Fluorolined Silicone, Replaces Stock Egr Hose.
Part Number: 589-CAC-3687223
$5417
Ships on 10/21/2026Lowest price guarantee
HPS PERFORMANCE
CAC-3687223 EGR Hose, 4-Ply Aramid Reinforced Fluorolined Silicone, Replaces Stock Egr Hose.
Part Number: 589-CAC-3687223
Ships on 10/21/2026Lowest Price Guarantee$5417
![FleetRunner Micro-V Serpentine Belt for 2004-2007 Mack and Peterbilt Models [12-Rib, 90.873 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-k120903hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for 2004-2007 Mack and Peterbilt Models [12-Rib, 90.873 in. Outside Circumference]
Part Number: 465-K120903HD
$16893
Ships on 10/16/2026Lowest price guarantee![FleetRunner Micro-V Serpentine Belt for 2004-2007 Mack and Peterbilt Models [12-Rib, 90.873 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-k120903hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for 2004-2007 Mack and Peterbilt Models [12-Rib, 90.873 in. Outside Circumference]
Part Number: 465-K120903HD
Ships on 10/16/2026Lowest Price Guarantee$16893
![FleetRunner Micro-V Serpentine Belt for Select 2000-2012 Peterbilt and Other Makes [6-Rib, 53.960 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-k060539hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for Select 2000-2012 Peterbilt and Other Makes [6-Rib, 53.960 in. Outside Circumference]
Part Number: 465-K060539HD
$3935
Ships on Oct 13, 2026Lowest price guarantee![FleetRunner Micro-V Serpentine Belt for Select 2000-2012 Peterbilt and Other Makes [6-Rib, 53.960 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-k060539hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for Select 2000-2012 Peterbilt and Other Makes [6-Rib, 53.960 in. Outside Circumference]
Part Number: 465-K060539HD
Ships on Oct 13, 2026Lowest Price Guarantee$3935
![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)
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
$7254
Ships on Oct 13, 2026Lowest 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
![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