Mahle-Behr BMW Drivetrain Parts for BMW X Series E53 (2000-2006)

Clear BMW chassis

Please ensure your correct model is selected

Building your perfect BMW is more than just adding horsepower and stiff suspension. Your drivetrain needs attention in order to deliver power effectively. Most BMWs feature comfortable clutch discs, heavy flywheels, long shifter throws, and open differentials. The drivetrain transmits power to the wheels, but can also be a source of power loss when it is designed for comfort rather than performance. Everything on this page will help you improve your power delivery and driving experience by providing custom Limited Slip Differentials, Short Shift Conversions, Performance Clutch Discs, Lightweight Flywheels, and anything else your BMW needs to be the perfect driving experience.
Sort By:

OEM Mahle-Behr Transmission Cooler Thermostat - E53 X5
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Mahle-Behr - Corporate Logo
T#:378158
Part#: 17107559966
Ships on Jul 15, 2026
$ 80.99 USD
Free Shipping
$ 80.99 USD
Free Shipping
Located near the bottom of the expansion tank, this thermostat controls the flow of coolant through the transmission cooler, cooling your transmission fluid as transmission fluid circulates as well. If this fails, you may be shortening the life of your transmission through hard use.
Show More Show Less