Charge Air Cooler Reservoir Cap - Many 2015+ Models

This part is listed by BMW as BMW part number 17117639024 (17 11 7 639 024) and is described as the cap for the small coolant reservoir found on many 2015+ BMW models. This cap fits on the small coolant reservoir often used for the heat exchanger in the intake system and is a separate cooling circuit than the larger primary cooling system.

On F48/U11 X1, F39/U10 X2, and F44 2-series models, this cap is also used on the engine coolant reservoir.

While your BMW cooling system may be considered very reliable, it's all depending on this coolant reservoir cap. This cap is not just to seal the coolant expansion tank - it regulates and maintains the pressure in the cooling system. A failed cap can lower the pressure inside the system and lead to poor cooling performance and loss of power. It can also be the source of annoying coolant leaks. Replacement of the cap is recommended every three years to ensure optimum cooling efficiency and performance. It's a simple and inexpensive preventative maintenance step.

This part number replaces the previous BMW number 17132754264.

This part is manufactured by an aftermarket supplier of European auto parts, including many cooling components. While not carrying OEM status, this part follows the design of the original very closely and uses similar materials. An aftermarket part may even have the same TUV approval as its OEM counterpart. The brand may even be OEM to another manufacturer besides BMW. This aftermarket brand has a two year warranty - the same as Genuine BMW and OEM brands.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.