HomeSteering > Power Steering Hoses, Pumps, and Related ComponentsDorman 603-674 Power Steering Reservoir
Part #: 603-674

Dorman 603-674 Power Steering Reservoir

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⚙️ 18 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Toyota and Lexus, 4Runner, GX470, and FJ Cruiser
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Overview of the Dorman Power Steering Reservoir 603-674

The Dorman 603-674 power steering reservoir is designed for reliable fluid storage in select Lexus and Toyota vehicles. This single reservoir unit is constructed from durable plastic with a matte black and white finish, ensuring compatibility and longevity in your vehicle's power steering system.

  • Material: Durable plastic construction
  • Color: Black and white with a matte finish
  • Includes one power steering reservoir and one reservoir cap
  • Single reservoir type for standard power steering systems
  • No mounting hardware, bracket, or fittings included

Detailed Product Description

The Dorman 603-674 power steering reservoir is engineered to meet the specifications required for Lexus and Toyota models such as the 4Runner, FJ Cruiser, and GX470. Its plastic construction offers resistance to corrosion and wear, while the matte black and white finish provides a clean, functional appearance under the hood. This reservoir comes with a matching cap to maintain system integrity and prevent fluid contamination. Note that mounting hardware, brackets, and fittings are not included, so existing components should be reused or sourced separately during installation.

Compatible Vehicles and Applications

This power steering reservoir is compatible with the following vehicles:

  • Lexus GX470
  • Toyota 4Runner
  • Toyota FJ Cruiser

It is designed specifically for power steering systems requiring a single reservoir type, making it suitable for maintenance or replacement in these models.

Common Issues Addressed by This Reservoir

  • Leaking or cracked power steering reservoir
  • Contaminated or degraded power steering fluid storage
  • Loss of fluid pressure due to reservoir failure
  • Overheating of power steering fluid from inadequate reservoir design
  • Replacement of worn or damaged reservoir caps

Installation Notes and Tips

When installing the Dorman 603-674 power steering reservoir, ensure the following:

  • Reuse existing mounting hardware and brackets as none are included
  • Check for proper hose connections and fittings compatibility
  • Fill the reservoir with the manufacturer-recommended power steering fluid
  • Inspect the reservoir cap seal to prevent leaks
  • Bleed the power steering system after installation to remove air pockets

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-674 power steering reservoir undergoes quality checks to ensure durability and performance. Please refer to Dorman's official warranty policy for specific coverage details.

BrandDorman
Part Number603-674
ColorBlack and White
Fittings IncludedNo
Friction Material ThicknessMatte
Installation Hardware IncludedNo
MaterialPlastic
Mounting Bracket IncludedNo
Mounting Hardware IncludedNo
Package Contents1 Power Steering Reservoir; 1 Cap
Remote MountedNo
Reservoir Cap IncludedYes
Reservoir TypeSingle

This part fits 18 vehicles. Search below:

YearMakeModelPositionNotes
2010Toyota4RunnerN/A
2009LexusGX470N/A
2009Toyota4RunnerN/A
2009ToyotaFJ CruiserN/A
2008LexusGX470N/A
2008Toyota4RunnerN/A
2008ToyotaFJ CruiserN/A
2007LexusGX470N/A
2007Toyota4RunnerN/A
2007ToyotaFJ CruiserN/A
2006LexusGX470N/A
2006Toyota4RunnerN/A
2005LexusGX470N/A
2005Toyota4RunnerN/A
2004LexusGX470N/A
2004Toyota4RunnerN/A
2003LexusGX470N/A
2003Toyota4RunnerN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

3R-111443050C030

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.