Automatic Transmission Thermostat

Product Details

When refreshing your BMW’s cooling system, there is one small, fragile component that is almost guaranteed to break during disassembly: the automatic transmission oil cooler thermostat. Tucked neatly into the bottom of the coolant expansion tank mounting plate, this thermostat plays a vital role in regulating the temperature of your automatic transmission fluid. Over time, constant heat cycling makes the plastic housing extremely brittle. Rather than risking a slow leak or a complete cooling system failure down the road, it is highly recommended to replace this thermostat whenever you swap out your expansion tank. This replacement from Febi Bilstein offers an affordable, OEM-quality solution to restore peace of mind and keep your cooling system sealed and functioning exactly as the factory intended.

Key Features

• Direct OEM Fitment: Designed to match the exact dimensions and specifications of the factory BMW unit.

• Crucial Prevents-Failure Maintenance: Ideal to replace during any standard expansion tank overhaul to avoid leaks caused by brittle, aged plastic.

• Effective Thermal Regulation: Restores proper coolant flow to your automatic transmission fluid heat exchanger to keep transmission temperatures in check.

• Premium Construction: Built with high-grade, heat-resistant composite materials to withstand harsh engine bay temperatures.

Specifications

• Manufacturer: Febi Bilstein

• Part Number: 17111437362 (Febi 36101)

• Opening Temperature: 80°C (176°F)

• Location: Bottom of the coolant expansion tank mounting plate

• Material: Composite plastic housing with integrated thermostat element

• Fitment: Select automatic transmission BMW models (E46 3-Series, E53 X5, E83 X3, E85/E86 Z4)

Prop 65 Warning

Product Q&A

Lifetime Replacement

Fits These Cars