Rein EPT0138 Engine Coolant Reservoir

OE Quality Engine Coolant Reservoir

The Rein EPT0138 engine coolant reservoir is an OE-quality expansion tank built for direct replacement on select BMW X5 and Land Rover Range Rover applications. It is made from virgin plastic to match OE material standards and deliver durable performance through repeated heat cycles.

For BMW X5 coolant reservoir replacement or a Land Rover Range Rover expansion tank repair, Rein EPT0138 provides the fit and material quality needed for a clean, factory-style service part.

Key Features

• Produced from virgin plastic meeting or exceeding OE specifications
• Resists cracking and wear caused by heat cycling
• Direct-fit design supports straightforward installation
• Built to strict engineering standards for materials and tolerances
• OE-quality construction for long service life

Detailed Description

Rein Automotive EPT0138 is an engine coolant reservoir designed as an OE-style replacement for cooling system service. The tank is manufactured from virgin plastic with no regrind, helping maintain durability and reduce the risk of premature cracking from temperature changes. This construction supports stable coolant storage and consistent performance in demanding underhood conditions. It is a practical choice for BMW X5 and Land Rover Range Rover owners needing a replacement expansion tank that matches factory fitment expectations.

This part cross-references Genuine 17137501959 for the same application.

Common Cooling System Issues It Can Address

• Coolant loss from a cracked expansion tank
• Visible plastic fatigue from repeated heat cycles
• Reservoir replacement after age-related deterioration
• Fitment problems caused by non-OE-style tanks
• Cooling system service on BMW X5 and Land Rover Range Rover models

Installation Notes and Tips

Fits 2004-2006 BMW X5, N/A. Fits 2003-2005 Land Rover Range Rover, N/A. Verify the reservoir shape, hose connections, and mounting points against the original tank before installation. Inspect related cooling system components, including hoses, caps, and level sensors, so the replacement reservoir can be installed into a clean and leak-free system.

Quality Assurance

Rein manufactures this expansion tank to strict material and dimensional standards, using virgin plastic to support durability and long-term service in OE-style cooling system repairs. Part number EPT0138 is engineered for application-specific fitment and consistent replacement quality.