HomeSteering > Power Steering Hoses, Pumps, and Related ComponentsDorman 603-709 Power Steering Reservoir
Part #: 603-709

Dorman 603-709 Power Steering Reservoir

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⚙️ 15 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Honda and Acura, Ridgeline, Pilot, and MDX
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Overview of Dorman Power Steering Reservoir 603-709

The Dorman 603-709 power steering reservoir is designed for remote mounting in select Acura and Honda vehicles. Engineered with durable plastic and a matte finish, this reservoir ensures reliable fluid storage and management for your power steering system.

  • Constructed from durable plastic material
  • Matte finish with gray, red, and white color accents
  • Remote mounted reservoir type for flexible installation
  • Includes one power steering reservoir and one reservoir cap
  • No mounting hardware, bracket, or fittings included

Detailed Product Description

This power steering reservoir by Dorman is specifically designed to fit Acura MDX, Honda Pilot, and Honda Ridgeline models. The remote-mounted design allows for easier placement within the engine bay, helping to maintain optimal fluid levels and pressure in the power steering system. The plastic construction offers resistance to corrosion and wear, while the matte finish reduces glare and enhances durability. The included reservoir cap seals the system to prevent contamination and fluid loss.

Common Applications and Problem Solving

  • Replaces cracked or leaking power steering reservoirs
  • Addresses low power steering fluid levels causing steering difficulty
  • Prevents contamination from dirt or debris entering the system
  • Helps resolve power steering noise due to air in the fluid
  • Supports proper fluid circulation for smooth steering response

Installation Notes and Tips

Installation of the Dorman 603-709 power steering reservoir requires removal of the old reservoir and proper routing of fluid lines to the remote-mounted unit. Note that mounting hardware, brackets, and fittings are not included, so reuse existing components or acquire compatible parts separately. Ensure the reservoir cap is securely tightened to avoid leaks. After installation, check fluid levels and bleed the power steering system as needed to remove air pockets.

Quality Assurance and Warranty

Dorman power steering reservoirs are manufactured to meet or exceed OEM specifications for fit, form, and function. While specific warranty details for part number 603-709 are not provided here, Dorman typically offers limited warranties covering defects in material and workmanship. Refer to Dorman’s official warranty policy for complete information.

BrandDorman
Part Number603-709
ColorGray
ColorRed
ColorWhite
Fittings IncludedNo
Friction Material ThicknessMatte
Installation Hardware IncludedNo
MaterialPlastic
Mounting Bracket IncludedNo
Mounting Hardware IncludedNo
Package Contents1 Power Steering Reservoir; 1 Cap
Remote MountedYes
Reservoir Cap IncludedYes
Reservoir TypeRemote

This part fits 15 vehicles. Search below:

YearMakeModelPositionNotes
2014HondaRidgelineN/A
2013HondaRidgelineN/A
2012HondaRidgelineN/A
2011HondaRidgelineN/A
2010HondaRidgelineN/A
2009HondaRidgelineN/A
2008HondaPilotN/A
2008HondaRidgelineN/A
2007HondaPilotN/A
2007HondaRidgelineN/A
2006HondaPilotN/A
2006HondaRidgelineN/A
2005HondaPilotN/A
2004AcuraMDXN/A
2003AcuraMDXN/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-21953697SB3951

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