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Peterbilt 378 Truck Parts For Sale

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Air Intake & Filtration (42)   Air Cleaners / Air Filter Housings (22)   Air Transfer Tubes (20)Air Tanks (20)Axles & Differentials (42)   Axle Assemblies, Front (40)   Spindles / Knuckles (2)Battery Box Covers (2)Battery Boxes / Trays (18)Brakes (5)   ABS Control Modules (1)   Air Dryers (3)   Brake Parts (1)Cab Mounts (5)Cab, Body & Interior (280)   Back Windows (1)   Bumpers, Front (14)   Cabs (31)   Dashboards (14)   Door Assemblies, Front (21)   Door Mirrors (21)   Door Vent Glass (1)   Door Window Regulators (2)   Door Windows (1)   Doors (45)   Fender Extensions (3)   Fenders (4)   Grilles (3)   Hood Hinges (2)   Hoods (30)   Interior Misc. Parts (21)   Mirrors (5)   Roof Fairings (1)   Seats (9)   Side View Mirrors (15)   Sleeper Doors (8)   Sleepers (8)   Steering Wheels (3)   Sun Visors (Exterior) (1)   Sun Visors (16)Cooling & HVAC (76)   A/C Compressors (1)   A/C Condensers (3)   Blower Motors (HVAC) (2)   Cooling Assemblies (Rad., Cond., ATAAC) (5)   Fan Blades (1)   Fan Clutches (1)   Heater / AC Climate Control Parts (13)   Intercoolers & Charge Air Coolers (10)   Intercoolers (1)   Radiator Frames (1)   Radiator Overflow Bottles / Surge Tanks (8)   Radiators (30)Electrical & Lighting (38)   Body / Chassis Control Modules (1)   Cab Wiring Harnesses (1)   Door Electrical Switches (1)   Fuse Boxes & Panels (6)   Gauges (4)   Headlight Assemblies (7)   Radios (4)   Side Marker Lamps (1)   Throttle Position Sensors (4)   Windshield Washer Reservoirs (4)   Windshield Wiper Arms (2)   Windshield Wiper Motors (3)Electrical Misc. Parts (1)Engine & Powertrain (5)   Engine Mounts (5)Exhaust & Emissions (22)   Exhaust Assemblies (6)   Exhaust Brackets (14)   Exhaust Pipes (2)   Exhaust Parts (4)Exterior Misc. Parts (14)Frame & Chassis (31)   Brackets, Misc. (7)   Crossmembers (13)   Deck Plates / Catwalk (1)   Frame Horns (10)Fuel System (52)   Fuel / Water Separators (1)   Fuel Tank Straps & Brackets (13)   Fuel Tanks (Truck) (38)Hood Parts (9)Hydraulics & PTO (4)   Hydraulic Tanks (4)Instrument Panel Clusters (29)Miscellaneous Truck Parts (4)Power Steering Reservoirs (2)Suspension & Steering (61)   Leaf Springs, Front (12)   Power Steering Assemblies (1)   Spring Hangers (3)   Steering Columns (20)   Steering Gears / Racks (2)   Steering Pumps (1)   Steering Shafts (1)   Suspension Crossmembers / K-Frames (6)   Suspension Misc. Parts (8)   Suspensions (7)Tool Boxes (12)Transmission & Driveline (9)   Driveshaft Parts (2)   Driveshafts (7)Truck Bodies / Boxes / Beds (1)Wheels, Tires & Hubs (2)   Mud Flap Hangers (2)
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Peterbilt (790)
Model
378 (790)
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Showing 1 - 25 of 790 Listings

1 - 25 of 790 listings
1 - 25 of 790 listings
Used Peterbilt 378 Battery Box

2006 Used Peterbilt 378 Battery Box

$195 USD
Used 378 Battery Box, Side: Driver, Tray Material: Aluminum, Battery Capacity: 4, Width: 29.50", Height: 13.00", Steps: No, Latch/Strap: N/A
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2006
SideDriver
Stock Number600-12557
MLS Number14475498
CategoryBattery Boxes / Trays
Last Updated7/10/2026
Location
Dorr, MI, US
Sold By
Frontier Truck Parts
(855) 300-___  SHOW
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Frontier Truck Parts
Peterbilt 378 Right Fender Extension

2001 Peterbilt 378 Right Fender Extension

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2001 Peterbilt 378 RH Fender Extension - Passenger Side - Used - May have some cosmetic blemishes (see photos). Got questions or need more information? Give us a shout by phone, email, or...
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2001
SideRIGHT
Part NumberTBD
Stock NumberPT-0644-20
MLS Number11906478
CategoryFender Extensions
Last Updated7/8/2026
Location
York, ON, Canada
Sold By
Lomoca Inc.
(833) 835-___  SHOW
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Lomoca Inc.
Used 2006 Peterbilt 378 60.5" Complete White Hood

Used 2006 Peterbilt 378 60.5" Complete White Hood

$3,763 USD
(USED) Peterbilt 378 SFA/SBA: SFA Color: WHITE Type: COMPLETE Length: 60.5 COMPLETE HOOD. CRACKS ON PASSENGER SIDE FENDER, BOTH FENDERS HAVE CHIPS ON EDGES, STRESS CRACKING ALONG TOP OF HOOD...
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Stock Number25795626
MLS Number13586083
CategoryHoods
Last Updated6/26/2026
Location
Kansas City, MO, US
Sold By
Vander Haag's Inc.
(855) 370-___  SHOW
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Vander Haag's Inc.
Used 1997 Peterbilt 378 SFA Red Complete Hood 60.5" Length

Used 1997 Peterbilt 378 SFA Red Complete Hood 60.5" Length

$3,763 USD
(USED) Peterbilt 378 SFA/SBA: SFA Color: RED Type: COMPLETE Length: 60.5 COMPLETE RH HEADLIGHT CRACKED BOTTOM OF LH FENDER CRACKED RH WHEEL WELL CRACKED
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Stock Number25708931
MLS Number13193584
CategoryHoods
Last Updated6/26/2026
Location
Winimac, IN, US
Sold By
Vander Haag's Inc.
(855) 370-___  SHOW
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Vander Haag's Inc.
Peterbilt 378 Engine Mount

2001 Peterbilt 378 Engine Mount

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Peterbilt 378 Radiator Mount For Sale, Used. Call for more information, we ship everywhere., Air/Hydraulic: Air/Hydraulic, Engine Make: Caterpillar, Engine Model: C15
ConditionUsed
Engine ModelCaterpillar C15
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2001
Stock NumberPT-0644-39
MLS Number14439515
CategoryEngine Mounts
Last Updated6/19/2026
Location
York, ON, Canada
Sold By
Lomoca Inc.
(833) 835-___  SHOW
NUMBERCall Seller
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Lomoca Inc.
Peterbilt 378 Left Spring Hanger

2001 Peterbilt 378 Left Spring Hanger

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Peterbilt 378 Frame Horn For Sale, Used. P/N: 02-01952L-M000, Driver Side. Call for details we ship everywhere., Capacity: 14000, Hub Bolts: 10, Brake Type: Drum, Axle Make: Eaton
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2001
SideLEFT
Capacity14000
Part Number02-01952L-M000
Stock NumberPT-0644-38
MLS Number14439514
CategorySpring Hangers
Last Updated6/19/2026
Location
York, ON, Canada
Sold By
Lomoca Inc.
(833) 835-___  SHOW
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Lomoca Inc.
Peterbilt 378 Right Spring Hanger

2001 Peterbilt 378 Right Spring Hanger

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Peterbilt 378 Frame Horn For Sale, Used. P/N: 02-02944R, Passenger Side. Call for details we ship everywhere., Capacity: 14000, Hub Bolts: 10, Brake Type: Drum, Axle Make: Eaton
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2001
SideRIGHT
Capacity14000
Part Number02-02944R
Stock NumberPT-0644-37
MLS Number14439513
CategorySpring Hangers
Last Updated6/19/2026
Location
York, ON, Canada
Sold By
Lomoca Inc.
(833) 835-___  SHOW
NUMBERCall Seller
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Lomoca Inc.
Peterbilt 378 Left Fuel Tank

2007 Peterbilt 378 Left Fuel Tank

$1,589 USD
FUEL TANK PETERBILT 378/379/389, DRIVER SIDE, REAR FILL, 26 X 57 IN.,125 GALLONS, YEARS 2007 + -- RESERVOIR A CARBURANT PETERBILT 378/379/389, COTE CHAUFFEUR, BOUCHON ARRIERE, 26 X 57...
ConditionNew
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2007
SideLEFT
Capacity125 G
Part NumberT07-126125-12P7
Stock NumberSIMI 79PB96804L
MLS Number14439224
CategoryFuel Tanks (Truck)
Last Updated6/19/2026
Location
Ste-Julie, QC, Canada
Sold By
Camions Lussier-Lussicam inc.
(844) 503-___  SHOW
NUMBERCall Seller
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Camions Lussier-Lussicam inc.
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