Cap. Reservoir. Tank.
A cover that prevents foreign debris from entering the container. Engine Coolant. Expansion. Overflow hose.
Engine Coolant Overflow HoseEngine Coolant Reservoir Cap
2.0 LITER. 2.0 LITER TURBO, 2.0 PHEV. 2.0 LITER, 2020-24. 2.0 LITER, AUXILIARY RADIATOR. 2.0 LITER, MAIN. 2.0 LITER, W/O XDRIVE 30EX, 2020-24. 2020-22. 2020-23, INNER RADIATOR. 3.0 LITER TURBO, MAIN. 3.0 LITER TWIN TURBO, PRIMARY, 2020-23. 3.0 LITER TWIN TURBO, PRIMARY, 2024-25. 3.0 LITER, MAIN. M40I, 2020-24. MAIN RADIATOR. Sedan, 2.0 LITER TURBO, 2.0 PHEV. W/O M, M COMPETITION, 2020-24. W/O M4, MAIN.
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.