Dorman Products 603-5404 Washer Fluid Reservoir

Part Number
Heavy Duty Windshield Washer Fluid Reservoir

Fits: 89-07 Peterbilt 357, 89-96 Peterbilt 375, 89-01 Peterbilt 377, 89-07 Peterbilt 379

Special Price $73.94 Regular Price $86.99
In stock
Only 6 left
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Estimated Ship Date: 1 Business Day or Less

This replacement washer fluid reservoir is manufactured to withstand the stresses of underhood heat and engine vibration. It is thoroughly tested to ensure optimum fit and performance on specific vehicle applications.

BRAND: Dorman - HD Solutions


  • Windshield, Washer, Fluid, Reservoir, Fluids, Reservoirs
  • Exact fit - each reservoir is carefully scanned to provide a precise match to the OEM shape and dimensions for a clean installation
  • Thoroughly tested - design has undergone heat age testing and burst testing to help ensure reliability in the toughest conditions
  • Peterbilt 357 2007-89, Peterbilt 375 1999-89, Peterbilt 377 2007-89, Peterbilt 379 2007-89
  • Heavy Duty Windshield Washer Fluid Reservoir
  • Direct replacement - this washer fluid reservoir fits and functions like original equipment on specific vehicle applications
  • Restores performance - everything you need to fix a leaking factory fluid reservoir


Mounting Bracket IncludedNo
Mounting Hardware IncludedNo
Package Contents1 Coolant Reservoir
Reservoir Cap IncludedYes

ID No. R86-6001



  • Paccar Parts: R866001
  • Automann: 575.1021


  • 1989-2007 Peterbilt 357 - Position: Front
  • 1989-2001 Peterbilt 377 - Position: Front
  • 1989-2007 Peterbilt 379 - Position: Front
  • 1989-1996 Peterbilt 375 - Position: Front
Customer Questions
Can I use Dorman parts to replace OEM parts?
Yes, Dorman parts can often be used as replacements for OEM parts, but it is important to carefully compare specifications and ensure compatibility.
How do I install Dorman shift linkage bushing?
To install a Dorman shift linkage bushing, first locate the old bushing and remove it if necessary. Apply lubricant to the Dorman bushing and slide it onto the shift linkage, tapping it into place with a soft tool until fully seated. Check the alignment and function of the shift linkage after installation.
Where is Dorman manufactured?
Dorman is a global automotive parts supplier with manufacturing facilities in the United States, Mexico, Canada, China, and India. Its headquarters and largest manufacturing facility are located in Colmar, Pennsylvania, USA.
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