Reservoir. Tank. Engine Coolant. Expansion.
A container that holds Engine Coolant.
Engine Coolant Reservoir
2 Series. 2017-19. 2017-19, W/O HYBRID. 2017-20. 2017-21. 230i, 230i xDrive. 3 Series GT. 330i xDrive. 330i, 330ix. 340i, 340ix. 4 Series; Main Tank. 430i, 430i xDrive; Main Tank. 430i, 430ix; Main Tank. 440i, 440i xDrive; Main Tank. 440i, 440ix; Main Tank. M240i, M240i xDrive. Sedan/Wagon, 2017-19, W/O HYBRID. W/O HYBRID, W/O M3, 2016-18, MAIN. W/O M MODEL.
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.