SEARCH BY VEHICLE:
Enter Vehicle Year Make Model

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

Peterbilt 378 Parts

What year is your
Free Same Day Shipping

Peterbilt 378

Filter Results
  • Notify When Available
    86-94 Peterbilt 357, 359, 362, 375, 377, 378, 379 Parallel Flow Heavy Duty AC Condenser

    Replaces Peterbilt A/C Condenser TRQ ACA84558

    Brand: TRQ
    - ACA84558

    $84.95
    Save 41%
    List $144.95 Save $60.00

    Replaces Peterbilt A/C Condenser TRQ ACA84558

    86-94 Peterbilt 357, 359, 362, 375, 377, 378, 379 Parallel Flow Heavy Duty AC Condenser
    Brand: TRQ - ACA84558
    $84.95
    Save 41%
    List $144.95 Save $60.00
  • Notify When Available
    Exterior Door Handle

    Replaces Peterbilt Front Passenger Side Exterior Door Handle TRQ DHA48836

    Brand: TRQ
    - DHA48836

    • Color: Chrome
    $64.95
    Save 31%
    List $93.95 Save $29.00

    Replaces Peterbilt Front Passenger Side Exterior Door Handle TRQ DHA48836

    Exterior Door Handle
    Brand: TRQ - DHA48836
    • Color: Chrome
    $64.95
    Save 31%
    List $93.95 Save $29.00
  • Notify When Available
    Mirror Set

    Replaces Driver & Passenger Side 2 Piece Mirror Set TRQ MRA17976

    Brand: TRQ
    - MRA17976

    • Quantity: 2 Piece
    • Adjustment Type: Manual
    • Kit Includes: (1) Passenger Side Mirror
    • Kit Includes: (1) Driver Side Mirror
    • Includes: Mounting Bracket
    $66.95
    Save 43%
    List $116.95 Save $50.00

    Replaces Driver & Passenger Side 2 Piece Mirror Set TRQ MRA17976

    Mirror Set
    Brand: TRQ - MRA17976
    • Quantity: 2 Piece
    • Adjustment Type: Manual
    • Kit Includes: (1) Passenger Side Mirror
    • Kit Includes: (1) Driver Side Mirror
    • Includes: Mounting Bracket
    $66.95
    Save 43%
    List $116.95 Save $50.00
  • Notify When Available
    Mirror

    Replaces Mirror TRQ MRA07150

    Brand: TRQ
    - MRA07150

    • Mirror Type: West Coast
    • Mirror Head Style: Pillow Back
    • Mirror Color / Finish: Paint to Match
    • Adjustment Type: Manual
    • Housing Turn Signal Indicator: No
    • Mirror Turn Signal Indicator: No
    • Cover Color: Black
    • Heated: No
    • Housing Color: Black
    • Cover Finish: Smooth
    $44.95
    Save 30%
    List $63.95 Save $19.00

    Replaces Mirror TRQ MRA07150

    Mirror
    Brand: TRQ - MRA07150
    • Mirror Type: West Coast
    • Mirror Head Style: Pillow Back
    • Mirror Color / Finish: Paint to Match
    • Adjustment Type: Manual
    • Housing Turn Signal Indicator: No
    • Mirror Turn Signal Indicator: No
    • Cover Color: Black
    • Heated: No
    • Housing Color: Black
    • Cover Finish: Smooth
    $44.95
    Save 30%
    List $63.95 Save $19.00
  • Notify When Available
    Mirror

    Replaces Mirror TRQ MRA08652

    Brand: TRQ
    - MRA08652

    • Includes: Mounting Bracket
    • Design: Round
    • Heated: Yes
    • Housing Turn Signal Indicator: No
    • Mirror Turn Signal Indicator: No
    • Adjustment Type: Manual
    • Cover Finish: Smooth
    • Cover Color: Stainless Steel
    • Housing Color: Stainless Steel
    $37.95
    Save 42%
    List $64.95 Save $27.00

    Replaces Mirror TRQ MRA08652

    Mirror
    Brand: TRQ - MRA08652
    • Includes: Mounting Bracket
    • Design: Round
    • Heated: Yes
    • Housing Turn Signal Indicator: No
    • Mirror Turn Signal Indicator: No
    • Adjustment Type: Manual
    • Cover Finish: Smooth
    • Cover Color: Stainless Steel
    • Housing Color: Stainless Steel
    $37.95
    Save 42%
    List $64.95 Save $27.00
  • Notify When Available
    Mirror

    Replaces Mirror TRQ MRA07149

    Brand: TRQ
    - MRA07149

    • Mirror Type: West Coast
    • Adjustment Type: Manual
    • Housing Turn Signal Indicator: No
    • Mirror Turn Signal Indicator: No
    • Heated: No
    • Cover Finish: Smooth
    • Cover Color: Aluminum
    • Housing Color: Aluminum
    • Mirror Head Style: Angled Back Square Corner
    $44.95
    Save 18%
    List $54.95 Save $10.00

    Replaces Mirror TRQ MRA07149

    Mirror
    Brand: TRQ - MRA07149
    • Mirror Type: West Coast
    • Adjustment Type: Manual
    • Housing Turn Signal Indicator: No
    • Mirror Turn Signal Indicator: No
    • Heated: No
    • Cover Finish: Smooth
    • Cover Color: Aluminum
    • Housing Color: Aluminum
    • Mirror Head Style: Angled Back Square Corner
    $44.95
    Save 18%
    List $54.95 Save $10.00
  • Notify When Available
    Windshield Washer Reservoir

    Replaces Kenworth Peterbilt Windshield Washer Reservoir with Washer Pump TRQ WWA06637

    2 reviews
    Brand: TRQ
    - WWA06637

    $84.95
    Save 22%
    List $108.95 Save $24.00

    Replaces Kenworth Peterbilt Windshield Washer Reservoir with Washer Pump TRQ WWA06637

    Windshield Washer Reservoir
    2 reviews
    Brand: TRQ - WWA06637
    $84.95
    Save 22%
    List $108.95 Save $24.00
  • Notify When Available
    87-05 Peterbilt 357, 365, 367, 378, 379, 388 Power Window Regulator and Motor RH

    Replaces Peterbilt 357 378 379 Front Passenger Side Power Power Window Motor & Regulator Assembly TRQ WRA52421

    Brand: TRQ
    - WRA52421

    • Operation: Power
    $103.95
    Save 41%
    List $176.95 Save $73.00

    Replaces Peterbilt 357 378 379 Front Passenger Side Power Power Window Motor & Regulator Assembly TRQ WRA52421

    87-05 Peterbilt 357, 365, 367, 378, 379, 388 Power Window Regulator and Motor RH
    Brand: TRQ - WRA52421
    • Operation: Power
    $103.95
    Save 41%
    List $176.95 Save $73.00
  • Notify When Available
    Kit image

    Replaces Driver & Passenger Side 2 Piece Mirror Set TRQ MRA38850

    Brand: TRQ
    - MRA38850

    • Quantity: 2 Piece
    • Kit Includes: (1) Passenger Side Mirror
    • Kit Includes: (1) Driver Side Mirror
    • Adjustment Type: Manual
    • Mirror Type: West Coast
    • Mirror Color / Finish: Paint to Match
    $94.95
    Save 32%
    List $139.95 Save $45.00

    Replaces Driver & Passenger Side 2 Piece Mirror Set TRQ MRA38850

    Kit image
    Brand: TRQ - MRA38850
    • Quantity: 2 Piece
    • Kit Includes: (1) Passenger Side Mirror
    • Kit Includes: (1) Driver Side Mirror
    • Adjustment Type: Manual
    • Mirror Type: West Coast
    • Mirror Color / Finish: Paint to Match
    $94.95
    Save 32%
    List $139.95 Save $45.00
  • Notify When Available
    Mirror Set

    Replaces Driver & Passenger Side 2 Piece Mirror Set TRQ MRA18693

    Brand: TRQ
    - MRA18693

    • Quantity: 2 Piece
    • Adjustment Type: Manual
    • Kit Includes: (1) Passenger Side Mirror
    • Kit Includes: (1) Driver Side Mirror
    • Includes: Mounting Bracket
    $75.95
    Save 43%
    List $132.95 Save $57.00

    Replaces Driver & Passenger Side 2 Piece Mirror Set TRQ MRA18693

    Mirror Set
    Brand: TRQ - MRA18693
    • Quantity: 2 Piece
    • Adjustment Type: Manual
    • Kit Includes: (1) Passenger Side Mirror
    • Kit Includes: (1) Driver Side Mirror
    • Includes: Mounting Bracket
    $75.95
    Save 43%
    List $132.95 Save $57.00
1

...

3 4 5 6 7

...

16
Close



Peterbilt is a registered trademark of PACCAR Inc. 1A Auto is not affiliated with or sponsored by Peterbilt or PACCAR Inc. See all trademarks.
Same Day Shipping

Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos to guide you step-by-step through your repair.

Go To Top
Select Your Vehicle

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

This part does not fit a

.
Show parts that fit