Rein EPT0238 Engine Coolant Reservoir - Radiator

OE-Style Coolant Reservoir for BMW and Mini

Rein EPT0238 is an engine coolant reservoir built for BMW X1, BMW X2, and select Mini Cooper applications. It is made from virgin plastic and uses OE-quality materials to help maintain proper coolant expansion and recovery in the cooling system.

With a natural plastic finish, twist-on cap design, and included mounting brackets, this expansion tank is a direct-fit replacement for vehicles that require a reservoir without a cap. Rein EPT0238 is engineered to match the original tank’s fit and function for everyday cooling system service.

Key Features

• Engine coolant reservoir / expansion tank for radiator cooling systems
• Virgin plastic construction with no regrind material
• Natural color plastic housing
• Twist-on cap type
• Mounting brackets included
• Mounting hardware not included
• Cap not included
• OE-quality replacement from Rein

Detailed Product Overview

Rein EPT0238 is designed for drivers searching for a BMW X1 coolant reservoir replacement, BMW X2 expansion tank, or Mini Cooper coolant reservoir that matches the original system layout. The tank is produced from virgin plastic to improve durability through repeated heat cycles and reduce cracking risk associated with lower-grade recycled material. This helps maintain stable coolant expansion and recovery performance in the engine cooling system.

This part cross-references BMW 17137617362 for the same application. Rein EPT0238 is a direct replacement choice for 2014-2019 Mini Cooper, 2016-2019 BMW X1, 2018-2019 BMW X2, 2016-2019 Mini Cooper Clubman, 2017-2019 Mini Cooper Countryman, and 2020-2024 Mini Cooper Countryman radiator applications listed without a cap.

Common Problems This Part Can Address

• Cracked or brittle coolant reservoir housing
• Coolant loss from a damaged expansion tank
• Reservoir failure caused by repeated heat cycling
• Incorrect fitment from a non-OE-style replacement tank
• Cooling system service needs on BMW X1, BMW X2, and Mini Cooper models

Installation Notes

Verify the vehicle uses a reservoir without a cap before ordering. Transfer any required components from the original system as needed, and confirm the mounting points and hose connections match the existing layout before installation. Because mounting hardware is not included, reuse or source the correct fasteners separately if required.

Quality Assurance

Rein manufactures this expansion tank to OE-quality standards using virgin plastic and application-specific fitment for BMW and Mini cooling systems. The design focuses on matching original equipment materials and service life expectations for the listed vehicles.