Shop BMW M6 Engine Coolant Reservoir. 2.0 LITER, MAIN. 2017-19, INNER RADIATOR. 2020-23, INNER RADIATOR Main, Tank, XDrive - OEM BMW Part # 17139846642 (17-13-9-846-642, 17138742976)

Reservoir. Tank. Engine Coolant. Expansion.
A container that holds Engine Coolant.

Engine Coolant Reservoir

2.0 LITER, MAIN. 2017-19, INNER RADIATOR. 2020-23, INNER RADIATOR. 3.0 LITER, INNER RADIATOR. 3.0 LITER, MAIN. 5 Series; Outer. 530e xDrive; Main Tank. 530E, INNER RADIATOR. 530e; Main Tank. 530i xDrive; Main Tank. 530i; Main Tank. 540i xDrive; Main Tank. 540i, 540i xDrive; Outer. 540i; Main Tank. 640i xDrive Gran Turismo; Outer. 740ex; Main. 740i, 740ix; Main. 840i Gran Coupe. 840i xDrive Gran Coupe. 840i xDrive; Main Tank. 840i; Main Tank. INNER RADIATOR. W/HYBRID, MAIN. W/O HYBRID, 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.