Shop OEM BMW Part # 17138665638 (17-13-8-665-638). Cap. Expansion. Reservoir. Engine Coolant Expansion Tank - Repair or Replace A failed expansion tank can cause the cooling system in

A cover that prevents foreign debris from entering the container. Auxiliary. Primary. Radiator Cap. tank. Engine Coolant. Radiator. Screw plug, tan.

Radiator CapEngine Coolant Reservoir Cap

Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.