Dorman 603-002 Engine Coolant Reservoir

Engine Coolant Reservoir for Durango and Grand Cherokee

This Dorman engine coolant reservoir is a direct replacement for select Dodge Durango and Jeep Grand Cherokee applications. Built from plastic to handle underhood heat and engine vibration, it restores proper coolant storage and system recovery for the 2016-2021 model years.

• Direct replacement coolant reservoir for select vehicles
• Plastic construction for underhood durability
• Clear and black reservoir design for fluid visibility and OE-style appearance
• Pressurized coolant cap included, rated to 21 psi
• Mounting brackets included for installation support
• Engineered to match original fit and function
• Compatible with 2016-2021 Dodge Durango and 2016-2021 Jeep Grand Cherokee

Fitment and OE Reference

Fits 2016-2021 Dodge Durango, N/A. Fits 2016-2021 Jeep Grand Cherokee, N/A. Part number 603-002 is also referenced by Mopar 68244088AA and cross-references CH3014164 for the same application.

Detailed Product Overview

Dorman 603-002 is an engine coolant reservoir engineered to replace the original tank on select Dodge Durango and Jeep Grand Cherokee models. The reservoir is shaped for the listed applications and built to match the original part’s fit and function, helping maintain proper coolant expansion and return during normal engine operation. Its pressurized cap and 0.5 L working capacity support the cooling system layout used on these vehicles, while the included hose and cap help complete the replacement.

What This Part Helps Address

• Cracked or leaking coolant reservoir housing
• Low coolant level caused by reservoir seepage
• Loss of coolant from a damaged cap or hose connection
• Cooling system overflow or recovery issues
• Visible wear from heat cycling and engine vibration

Installation Notes and Tips

Verify the reservoir shape, mounting points, and cap style against the original part before installation. Confirm the vehicle uses the pressurized coolant reservoir configuration listed here, and inspect the hose connection points and surrounding cooling system components for wear before reassembly. This part number is 603-002.

Quality Assurance

Dorman manufactures this replacement coolant reservoir from quality materials to withstand underhood heat and vibration. It is engineered to match original fit and function for the listed Dodge Durango and Jeep Grand Cherokee applications.