Dorman 603-575 Washer Fluid Reservoir - Front

Combined Reservoir for Ram Trucks

This Dorman reservoir is a direct replacement for the factory coolant and washer fluid tank used on select Dodge Ram trucks. Built from plastic with a white finish, it is shaped to match the original underhood layout and includes mounting brackets, a flip-top cap, and a cap for the reservoir assembly.

Compatible with 2006-2009 Dodge Ram 2500, front; 2006-2009 Dodge Ram 3500, front; and 2006-2008 Dodge Ram 1500, front. If you are replacing a cracked or leaking combined coolant and washer fluid reservoir, Dorman 603-575 is built to restore the original fit and function.

Key Features

• Direct replacement coolant and washer fluid reservoir for select Dodge Ram applications
• Plastic construction for underhood use
• Irregular shape with factory-style mounting points
• Includes mounting brackets and caps
• Non-pressurized design
• Capacity: washer 4 L; cooler 2.7 L
• Cross-reference part number: 55056502AD

Detailed Description

Dorman 603-575 is engineered to match the fit and function of the original combined reservoir used on Ram 1500, Ram 2500, and Ram 3500 trucks in the front engine compartment. The reservoir is manufactured from quality materials to handle underhood heat and engine vibration, helping maintain proper coolant and washer fluid storage in the original location. The assembly uses a flip-top cap design and is supplied with the caps needed for the reservoir.

For buyers searching for a 2006-2009 Dodge Ram 2500 washer fluid reservoir or a 2006-2008 Dodge Ram 1500 coolant reservoir replacement, this part number 603-575 provides a direct OE-style solution. It is also a practical choice when the original tank is damaged, discolored, or no longer sealing correctly.

What It Helps Fix

• Cracked or leaking coolant/washer reservoir housing
• Loss of washer fluid storage from tank damage
• Coolant reservoir seepage at the original mounting area
• Broken or missing reservoir caps
• Fitment issues after replacing a worn factory tank

Installation Notes and Tips

Verify the vehicle’s front-mounted combined reservoir layout before ordering. Compare the mounting hole locations, shape, and cap style to the original unit to confirm a proper match. Transfer any connected hoses and level-related components from the original setup as needed, and inspect surrounding brackets and lines for wear before installation.

Quality Assurance

Dorman manufactures this replacement reservoir from materials selected for underhood durability and builds it to match the original part’s fit and function. Part number 603-575 is intended as an OE-style replacement for the listed Ram truck applications.