Automatic Transmission Thermostat Kit

Product Details

Heat is the ultimate enemy of performance and reliability on your BMW. When factory plastic cooling components undergo hundreds of heat cycles, they become brittle and break. If you’re refreshing your cooling system or chasing trans fluid temp issues, doing it piecemeal is a recipe for a flatbed tow.

We built this Turner Motorsport Cooling Overhaul Kit to hit the key failure points around your automatic transmission heat exchanger and expansion tank mounting setup in one swift move while maintaining value for money. Featuring Bavarian Autosport hardware, this kit replaces the failure prone trans thermostat, brittle mounting plate, connection pipe, and securing hardware. Keep your coolant flowing where it should, protect your transmission, and drive with confidence whether you're carving canyons or running hard on track.

What’s Included

• Bavarian Autosport Automatic Transmission Thermostat: Ensures rapid warm-up and consistent cooling for your trans fluid under load.

• Bavarian Autosport Expansion Tank Mounting Plat: Solid, rigid foundation to secure your expansion tank under vibration and high Gs.

• Bavarian Autosport Water Connection Pipe: Leak-free coolant transfer between the mounting plate and cooling circuit.

• Self-Tapping Hardware: Fresh hardware so you’re not reusing tired, stripped-out screws.

Why You Need This

• Track & Street Proven: Built to withstand the harsh thermal cycling of aggressive driving.

• Complete System Refresh: Replaces every interlinked mounting and cooling component at the base of the tank simultaneously.

• Protects Your Gearbox: Prevents stuck-closed thermostat conditions that cook your automatic transmission fluid.

Prop 65 Warning

Kit Contents

Product Q&A

Lifetime Replacement