Dorman 603251 Non-Pressurized Engine Coolant Reservoir with Cap

The Dorman 603-251 is a direct-fit, non-pressurized engine coolant reservoir (also known as a coolant overflow tank, coolant recovery bottle, or antifreeze reservoir) designed to restore proper cooling system function. Manufactured from durable plastic, this reservoir collects and stores excess coolant from the engine, preventing fluid loss and protecting the engine compartment from contamination.

Key Features:

• Direct OE Replacement: Engineered to match the fit and function of the original factory coolant reservoir for a seamless, no-modification installation
• Non-Pressurized Design: Functions as a coolant recovery/recirculating reservoir, allowing the cooling system to breathe and return coolant as temperatures fluctuate
• Durable Plastic Construction: Resistant to underhood heat, vibration, and coolant fluid, providing long-lasting performance
• Cap Included: Ships complete with the reservoir cap — no separate purchase required
• White Finish: Matches OEM appearance for a clean, factory-correct installation
• Backed by Over 100 Years of Expertise: Dorman is a leading U.S.-based aftermarket automotive parts manufacturer with a proven track record of quality OE solutions

If your original coolant reservoir is cracked, leaking, or damaged, the Dorman 603-251 provides a reliable, cost-effective replacement. This reservoir is also commonly searched as a coolant overflow tank, antifreeze bottle, or degas bottle. Confirm vehicle fitment before purchasing.