BMW Thermostats

Replace the Achilles heel of your factory cooling system with a stout and reliable mechanical thermostat setup.

The factory E46 thermostat housing is a combined unit featuring a plastic housing and a built in thermostat that you cannot replace separately. These plastic all-in-one units are commonly know to crack or fail causing a headache, a trip on the tow truck and possible damage to your engine.

Taking cues from the reliable M50 thermostat setup we designed a an assembly that not only converts your plastic housing into a billet aluminum unit but also swaps out the integrated thermostat for a separate replaceable thermostat. The ability to swap out thermostats separately from the whole housing opens up doors to changing thermostats to different temperature ratings based on your application while also providing lower maintenance costs. No longer do you have to replace the whole housing but just the thermostat itself.

The billet housing is designed to be utilized with E46 M3 upper and lower radiator hoses and also features -16 ORB connections for custom radiator hoses. A major upgrade from the factory and aftermarket plastic units. Our thermostat housing kit can be used by the savvy daily driver or the track hero who wants to ensure the durability of their cooling system.

Key benefits:

Uses M50/S50 mechanical thermostat for increased reliability
Option to use aftermarket colder thermostats if desired
Thermostat can be replaced separately for lower maintenance cost
Barbed hose connections for use with E46 M3 hoses or built in -16 ORB connections for custom radiator hoses
Design:

Machined out of a single piece of billet 6061 aluminum, this thermostat housing will withstand higher prolonged temperatures and abuse for performance applications
Black anodized with engraved Turner logo on the front to match the Turner Motorsports Power Steering Reservoir
Viton gasket for superior sealing performance
For use with E46 M3 radiator hoses 11537830715 and 11537830716
Kit contents:

6061 Billet Aluminum Thermostat Housing
Mechanical Thermostat
Thermostat Housing Gasket
Thermostat Harness
Optional Silicone or Rubber E46 M3 coolant hoses
Product Development:

Our Billet Thermostat Housing upgrade was designed, engineered, tested and quality inspected by our Research and Development team at Turner. Nothing but the highest level of precision and quality through leading-edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer and rigorous long term product testing.

BMW E46 M54 AAF Low Temp Thermostat Kit - Partial is an essential upgrade for enthusiasts looking to optimize engine performance and reliability. Developed by Advanced Auto Fabrication (AAF), this kit addresses the limitations of the factory M54 thermostat, which maintains a temperature range of 80-103°C and opens the mechanical failsafe at 110°C. For race conditions where maintaining a lower temperature is crucial, this kit replaces the stock electronic thermostat with a manual unit, allowing the engine to run at a safer and more efficient temperature. This upgrade not only enhances engine longevity but also reduces stress from high-temperature operation, minimizes heat soak, and increases power.

• Optimal Temperature Control: Replaces the factory thermostat for improved engine temperature management.
• Enhanced Engine Longevity: Operates at safer temperatures, reducing stress and extending engine life.
• Increased Power: Lower operating temperatures can lead to better engine performance.
• Reduced Heat Soak: Helps prevent overheating and ensures efficient cooling.
• Improved Reliability: Manual thermostat unit offers more consistent performance in racing conditions.

Partial Kit Contents:

• Thermostat housing plate
• Thermostat
• Installation hardware

Rein Thermostat 92C is an essential component designed to regulate the temperature in BMW engines, ensuring the vehicle runs at optimal performance while preventing overheating. Engineered to open at 92°C, this high-quality thermostat allows for precise coolant flow, keeping the engine at the correct temperature for maximum efficiency. Available at Turner Motorsport, the Rein Thermostat 92C is designed specifically for BMW vehicles, offering a direct-fit replacement that ensures easy installation and reliable operation.

• Opens at 92°C for precise temperature regulation
• Designed specifically for BMW engines for perfect fit and compatibility
• Prevents engine overheating and helps protect critical engine components
• Enhances overall engine efficiency and performance
• Manufactured from durable materials for long-lasting reliability
• Direct-fit replacement for easy installation

The Rein Thermostat 92C is the ideal solution for BMW owners who want to ensure their vehicle’s engine operates efficiently and reliably, providing optimal temperature control and enhanced performance.

Thermostat Assembly 82C is a high-quality, precision-engineered component designed to regulate the engine's cooling system effectively. Manufactured to meet or exceed OEM specifications, this thermostat helps ensure optimal engine performance by maintaining the ideal operating temperature. Available from Turner Motorsport, this part offers superior durability and reliability for a wide range of vehicle models.

• Designed for precise temperature control
• Maintains engine at the optimal 82°C (180°F) temperature
• Helps prevent overheating and improves fuel efficiency
• Direct fit replacement for hassle-free installation
• Manufactured from high-quality materials for long-lasting performance

Upgrade your vehicle's cooling system with this essential Thermostat Assembly 82C, ensuring smooth engine operation under various driving conditions.

Thermostat 80C is a crucial component for controlling the temperature in BMW engines, ensuring optimal performance and protection. Designed to open at 80°C, this thermostat helps your engine reach its ideal operating temperature quickly while preventing overheating. Engineered specifically for BMW vehicles, the Thermostat 80C ensures precise temperature regulation, enhancing both engine efficiency and longevity. Available at Turner Motorsport, this direct-fit replacement offers easy installation and reliable performance.

• Designed for BMW engines for a perfect fit
• Opens at 80°C to regulate coolant flow and maintain optimal temperature
• Prevents overheating and improves engine efficiency
• Manufactured from high-quality, durable materials for long-lasting use
• Direct-fit replacement ensures hassle-free installation
• Enhances overall engine performance and longevity

The Thermostat 80C from Turner Motorsport is the perfect choice for BMW owners looking to maintain optimal engine temperature, ensuring smooth operation and extending the life of their vehicle.