Keep your engine's cooling system filled and holding pressure with the Dorman - OE Solutions Engine Coolant Reservoir 603-205. This pressurized plastic tank stores coolant and lets the system draw from and return fluid to it as temperatures rise and fall. It drops in as a direct-fit replacement for the 2001-2006 Ford Escape, the 2001-2006 Mazda Tribute, and the 2005-2006 Mercury Mariner, all equipped with the V6-3.0L engine.
- Pressurized design: ships with a spring-loaded twist cap rated to a maximum of 17 PSI.
- Durable construction: molded from quality plastic to handle underhood heat and engine vibration.
- Ready to install: includes the cap and mounting brackets, with two mounting holes for locating the tank.
- Engineered replacement: built to drop in like the original part on the listed applications.
Over time a coolant reservoir can crack, warp, or leak at the seams, letting the system lose fluid. If a failed reservoir is the cause of low coolant or seepage, this replaces it. Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Color: natural. Country of origin: China.
Manufacturer part number 603-205 (also 603205).
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
Which vehicles does this coolant reservoir fit?
It's a direct-fit replacement for the 2001-2006 Ford Escape, 2001-2006 Mazda Tribute, and 2005-2006 Mercury Mariner, all with the V6-3.0L engine. Check the Buyer's Guide tab to confirm your vehicle.
Does it come with a cap?
Yes. It includes a spring-loaded twist cap rated to a maximum of 17 PSI, along with mounting brackets.
Is mounting hardware included?
No. Mounting hardware is not included. Consult the vehicle service information for the correct fasteners and whether they may be reused.
What is the reservoir made of?
It is molded from quality plastic designed to withstand underhood heat and engine vibration. The color is natural.
What are signs the coolant reservoir may need replacing?
Cracks, warping, or seepage at the seams that let the cooling system lose coolant. Diagnose the source of any leak before replacing, as low coolant can have other causes.
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