1. Home
  2. For Sale
  3. Truck Parts
  4. Peterbilt
  5. 378
  6. Used

Used Peterbilt 378 Truck Parts For Sale in United States

Close
Your Current Search
Industry
Truck Parts
Manufacturer
Peterbilt
Model
378
Condition
Used
Country
United States
Click the to remove the filter.
Save Search
Email Alert
What's Save Search and Email Alert?
Narrow Your Search
Keyword Search
Search within the selected criteria
Equipment Type
Trucks (47)
Truck Parts (604)
Category
A/C Condensers (1)A/V Equipment (3)   Radios (3)ABS Control Modules (1)Air Cleaners / Air Filter Housings (21)Air Dryers (4)Air Tanks (15)Air Transfer Tubes (12)Axle Assemblies, Front (26)Back Windows (1)Battery Box Covers (2)Battery Boxes / Trays (13)Blower Motors (HVAC) (2)Brackets, Misc. (7)Bumpers, Front (9)Cab Exterior Panels (2)Cabs (20)Charge Air Coolers (ATAAC) (10)Coolant Tubes (1)Cooling Assemblies (Rad., Cond., ATAAC) (7)Crossmembers (8)Cutoffs (1)Dashboards (10)Deck Plates / Catwalk (3)Diesel Exhaust Fluid (DEF) Tanks (1)Door Mirrors (12)Door Vent Glass (1)Door Window Regulators (2)Door Windows (1)Doors (49)   Door Assemblies, Front (15)Electrical Misc. Parts (2)Engine Parts (3)   Engine Mounts (2)   Intercoolers (1)Exhaust Parts (15)   Exhaust Assemblies (4)   Exhaust Brackets (6)   Exhaust Pipes (1)Exterior Misc. Parts (1)Fairings (1)   Roof Fairings (1)Fan Blades (1)Fan Clutches (1)Fender Extensions (3)Fenders (3)Fifth Wheels (1)Frame Horns (8)Frames (5)Fuel / Water Separators (1)Fuel Tank Straps & Brackets (11)Fuel Tanks (Truck) (16)Fuse Boxes & Panels (2)Gauges (1)Grilles (1)Headlight Assemblies (3)Heater / AC Climate Control Parts (7)Hood Parts (11)   Hood Hinges (3)Hoods (22)Hydraulic Tanks (4)Instrument Panel Clusters (30)Interior Misc. Parts (11)Leaf Springs, Front (13)Leaf Springs, Rear (1)Mirrors (5)Miscellaneous Truck Parts (8)Mud Flap Hangers (1)Power Steering Assemblies (1)Power Steering Reservoirs (1)Radiator Core Supports (1)Radiator Overflow Bottles / Surge Tanks (8)Radiators (23)Salvage Trucks (46)Seats (7)Side View Mirrors (11)Sleeper Parts (10)   Sleeper Doors (6)   Sleeper Windows (4)Sleepers (2)Spindles / Knuckles (4)Spring Hangers (3)Steering Columns (15)Steering Gears / Racks (3)Steering Pumps (1)Steering Wheels (3)Sun Visors (13)Suspension Crossmembers / K-Frames (7)Suspension Misc. Parts (18)Suspensions (6)Throttle Position Sensors (4)Tool Boxes (11)Truck Bodies / Boxes / Beds (1)Turbochargers / Superchargers (7)Windshield Washer Reservoirs (3)Windshield Wiper Arms (2)Windshield Wiper Motors (3)
Make
Peterbilt (651)
Model
378 (651)
A limited list of models are shown. Select a category above to view all available models.
Condition
Used (651)
Model Year
-
Horsepower
-
Price
-
Country
United States (651)
State / Region
Select a state below and click Refine Results.























Market Type
For Sale (651)

Shop Truck Parts by Category

Showing 1 - 25 of 651 Listings

1 - 25 of 651 listings
1 - 25 of 651 listings
Peterbilt 378 Left Fender

2004 Peterbilt 378 Left Fender

Recently Updated
$339.95 USD
Genuine Peterbilt Fender Extension Drivers / Left Side, Take off 2004 Peterbilt 378, Material: Fiberglass, Some scratches and gauges in the fiberglass, see pictures, OEM# 15-06902M001L,...
ConditionUsed
Fits To Make(s)PETERBILT
Fits To Model(s)378
SideLeft
Stock Number15830
MLS Number13987590
CategoryFenders
Last Updated2/25/2026
Location
Spokane Valley, WA, US
Sold By
High Mountain Horsepower
(833) 913-___  SHOW
NUMBERCall Seller
Email Seller
Save
High Mountain Horsepower
Peterbilt 378 Turbocharger / Supercharger

2004 Peterbilt 378 Turbocharger / Supercharger

Recently Updated
$44.95 USD
Rubber Reducing Elbow, 7" to 6", Take off 2004 Peterbilt 378 with a Cummins ISX450 Engine, P/N: 43931101 / 439311-01,
ConditionUsed
Fits To Make(s)PETERBILT
Fits To Model(s)378
Stock Number15776
MLS Number13984580
CategoryTurbochargers / Superchargers
Last Updated2/20/2026
Location
Spokane Valley, WA, US
Sold By
High Mountain Horsepower
(833) 913-___  SHOW
NUMBERCall Seller
Email Seller
Save
High Mountain Horsepower
Peterbilt 378 Radiator Core Support

2004 Peterbilt 378 Radiator Core Support

Price Drop $499.95 USD
Genuine Peterbilt Radiator Core Support / Crossmember with Tow Hitch Bracket, Radiator Core Support P/N: 01-46370M004, Tow Hitch Bracket NOT INCLUDED
ConditionUsed
Fits To Make(s)PETERBILT
Fits To Model(s)378
Stock Number15866
MLS Number13989024
CategoryRadiator Core Supports
Last Updated2/17/2026
Location
Spokane Valley, WA, US
Sold By
High Mountain Horsepower
(833) 913-___  SHOW
NUMBERCall Seller
Email Seller
Save
High Mountain Horsepower
Peterbilt 378 Electrical Parts

2004 Peterbilt 378 Electrical Parts

$69.99 USD
Genuine Cummins ISX Electronic Control Cooler for ECM / Cooling Plate for ECM, Take off 2004 Peterbilt 378 with a Cummins ISX 450ST Engine, Casting # 4076861
ConditionUsed
Fits To Make(s)PETERBILT
Fits To Model(s)378
Stock Number16028
MLS Number14021902
CategoryElectrical Misc. Parts
Last Updated2/12/2026
Location
Spokane Valley, WA, US
Sold By
High Mountain Horsepower
(833) 913-___  SHOW
NUMBERCall Seller
Email Seller
Save
High Mountain Horsepower
Peterbilt 378 Right Fender

2004 Peterbilt 378 Right Fender

$339.95 USD
Genuine Peterbilt Fender Extension Passengers / Right Side, Take off 2004 Peterbilt 378, Material: Fiberglass, Some scratches and gauges in the fiberglass, see pictures, OEM#...
ConditionUsed
Fits To Make(s)PETERBILT
Fits To Model(s)378
SideRight
Stock Number15862
MLS Number13989019
CategoryFenders
Last Updated2/12/2026
Location
Spokane Valley, WA, US
Sold By
High Mountain Horsepower
(833) 913-___  SHOW
NUMBERCall Seller
Email Seller
Save
High Mountain Horsepower
Peterbilt 378 Turbocharger / Supercharger

2004 Peterbilt 378 Turbocharger / Supercharger

$44.95 USD
Air Intake Coupler, 7 1/2" Diameter, Nipple: 2 1/2" Diameter, Take off 2004 Peterbilt 378 with a Cummins ISX450 Engine, OEM# P15-8024 OEM# P15-8024
ConditionUsed
Fits To Make(s)PETERBILT
Fits To Model(s)378
Stock Number15775
MLS Number13984579
CategoryTurbochargers / Superchargers
Last Updated2/12/2026
Location
Spokane Valley, WA, US
Sold By
High Mountain Horsepower
(833) 913-___  SHOW
NUMBERCall Seller
Email Seller
Save
High Mountain Horsepower
Peterbilt 378 Crossmember

2004 Peterbilt 378 Crossmember

$599.95 USD
Crossmember with Gussets and Cab Air Ride, Take off 2004 Peterbilt 378, Crossmember P/N: 01-47626 / 0147626, Gusset P/N: 01-47609 / 0147609, Cab Air Ride P/N: 20-106901, Air Bag P/N:...
ConditionUsed
Fits To Make(s)PETERBILT
Fits To Model(s)378
Stock Number15869
MLS Number13989027
CategoryCrossmembers
Last Updated2/11/2026
Location
Spokane Valley, WA, US
Sold By
High Mountain Horsepower
(833) 913-___  SHOW
NUMBERCall Seller
Email Seller
Save
High Mountain Horsepower
Peterbilt 378 Turbocharger / Supercharger

2004 Peterbilt 378 Turbocharger / Supercharger

$99.95 USD
Aluminum Pipe, 7" Long with a 7" Diameter, Take off 2004 Peterbilt 378 with a Cummins ISX450 Engine, P/N: 05-10550-028 / 0510550 / 0510550028,
ConditionUsed
Fits To Make(s)PETERBILT
Fits To Model(s)378
Stock Number15774
MLS Number13984578
CategoryTurbochargers / Superchargers
Last Updated2/11/2026
Location
Spokane Valley, WA, US
Sold By
High Mountain Horsepower
(833) 913-___  SHOW
NUMBERCall Seller
Email Seller
Save
High Mountain Horsepower
Peterbilt 378 Hood

2006 Peterbilt 378 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 Updated2/11/2026
Location
Kansas City, MO, US
Sold By
Vander Haag's Inc.
(855) 370-___  SHOW
NUMBERCall Seller
Email Seller
Save
Vander Haag's Inc.
Save Search
Email Alert
What's Save Search and Email Alert?
Want to narrow or modify your search criteria?
Filter by Price
Filter by Year
Filter by Location
Filter by Model
Filter by Keyword
Modify your search
Did you find what you were looking for? Yes No