Billet Aluminum Thermostat Housing for Audi 3.0T Gen 1 Supercharged Engines – Replaces OEM 06E121111AL
Upgrade your Audi B8 S4, B8 S5, B8.5 S4, B8.5 S5, B8.5 Q5, B8.5 SQ5, C6 A6, C7 A6, A7, A8, or Q7 with our precision CNC-machined billet aluminum thermostat housing. Designed to replace the failure-prone factory plastic unit, this direct OEM replacement eliminates cracking, warping, and coolant leaks common with the stock 3.0T TFSI thermostat housing.
Watch the Installation:
VERSION 2 NOW AVAILABLE We've made two major upgrades to further refine our CNC-machined thermostat housing:
Resolved Overcooling in Cold Climates – Version 2 addresses the overcooling issue reported by some customers, particularly in colder environments. If you purchased a Version 1 unit, contact us and we'll send you a free retrofit kit.
Improved Screw Placement – Assembly screws have been repositioned outside the O-ring groove to eliminate the risk of hardware falling into the engine block in the rare event of loosening.
Why Upgrade from Factory Plastic?
The factory Audi 3.0T thermostat housing (part number 06E121111AL) is a known weak point in the supercharged TFSI engine. Common failures include:
Coolant leaks from cracked plastic housing
Warped mating surfaces causing poor sealing
Brittle material degradation over time
Our billet aluminum thermostat housing eliminates these issues with aerospace-grade 6061-T6 aluminum construction and hard anodized finish for superior durability and reliability.
Available in Two Options:
Thermostat Housing Only Ideal for those using their own thermostat insert (e.g., Mishimoto Racing Thermostat). Click HERE for the Thermostat Housing Only install video.
Complete Thermostat Assembly Fully pre-assembled and drop-in ready for hassle-free installation.
Features:
CNC-machined from solid 6061-T6 billet aluminum
Hard anodized finish for corrosion resistance
Direct bolt-on replacement for OEM part 06E121111AL
Precision-engineered in the USA
Compatible with OEM and aftermarket thermostats
Includes all necessary gaskets and hardware (complete assembly option)
Seems to be much better vs factory. It Bottoms out before hitting the aluminum which makes it feel as it’s really seating down. The factory ones just fall in and down feel like they seat at all.
G
Garrett
Came as expected and the quality compared to oem is crazy cant wait to install and dont want to get hopes up but gps and there team was kind enough to send a gps keychain sticker and small pack of gummy bears lol love a company who cares about their customers
N
Nick Souza
customer service great
J
Jose Mercado
Fantastic product that offers a lifetime of service!
N
Nick
Best option when replacing your thermostat. Period. This upgraded housing is flawless!
