3.0T Billet Aluminum Thermostat - 80C Thermostat for Audi B8 S4/S5/Q5/Q7/SQ5, C7 A6/A7 & VW Touareg 3

From the factory, Audi's 3.0T engine is equipped with a plastic thermostat housing. While sufficient when new, its plastic construction is prone to degradation over time. After enduring thousands of heat cycles and consistent exposure to chemical-rich antifreeze, the housing becomes brittle and begins to crack. Once the material is compromised, it can lead to a significant coolant leak, which, if left unchecked, may result in overheating and severe engine damage. This is especially problematic for the supercharged 3.0T, where maintaining proper engine temperature is critical for both performance and longevity.

Our engineers set out to fix this issue with the ECS Billet Aluminum Thermostat Upgrade, engineered for enhanced durability, efficiency, and reliability. This precision-machined 6061 T6 billet aluminum thermostat replaces the failure-prone factory plastic housing, addressing one of the most common failure modes for all 3.0T supercharged engines. Designed with both performance and longevity in mind, this thermostat is the ultimate solution to overheating and coolant leaks, offering peace of mind in everyday driving and high-performance applications.

The ECS Billet Aluminum Thermostat is the perfect choice for Audi 3.0T owners looking to enhance cooling system durability and reliability while eliminating the weaknesses of the OEM design. Take control of your engine’s performance and longevity today!

PERFORMANCE FEATURES

• Our 6061-T6 billet aluminum housing is engineered for superior strength and reliability, offering exceptional resistance to cracking and warping.
• A striking red anodized finish provides corrosion resistance while adding a sleek aesthetic to your engine bay.
• The billet aluminum thermostat fin assembly features DLC (diamond-like coating) to reduce friction in thermostat operation, ensuring smooth and reliable performance.
• The internal return spring features a durable Zinc coating for exceptional longevity and corrosion resistance. 
• Our proprietary scraper seal is constructed from high-quality Viton rubber, providing a secure, leak-free seal for optimal cooling system performance.
• The ECS Billet Aluminum Thermostat Upgrade comes with an 80°C thermostat pre-installed for ease of assembly.

BENEFITS

• Fixes Common Failure Modes: Eliminates the risk of cracking, leaking, and other issues associated with the OE plastic thermostat housing.
• Enhanced Cooling Performance: Maintains stable engine temperatures, even under demanding street or track conditions.
• Dual-Purpose Design: Built for high-performance enthusiasts while offering reliability for daily drivers.

PRODUCT DEVELOPMENT

Our ECS 3.0T Billet Aluminum Thermostat Upgrade was designed, engineered, tested, and quality inspected by our Research and Development team in our Wadsworth, Ohio facility. We strive for 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.

INSTALLATION & SUPPORT

 Need installation tips? We put together a full installation tutorial from start to finish, including detailed instructions on removing your OE parts! See our Installation PDF under the INSTALLATION Tab for more information.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.