Shop OEM BMW Part # 17111468076 (17-11-1-468-076). Engine Coolant Reservoir Cap. Engine Coolant Expansion Tank - Repair or Replace A failed expansion tank can cause the cooling system in

Cap. Reservoir.
A cover that prevents foreign debris from entering the container. tank. Bar lock. Drain Plug. Engine Coolant. Radiator. Included with: Reservoir assy.

Engine 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.