Collection: Thermostats

Gen 1 (EA837) - 2009-2016

The first generation of the 3.0 TFSI supercharged engine features:

• Aluminum-silicon (Alusil) cylinder block without sleeves
• Direct fuel injection only
• Fixed supercharger pulley (non-clutched)
• Simos 8 ECU

Found in:

• 2010-2012 B8 S4, S5 (all markets)
• 2013-2016 B8.5 S4, S5 (North America)
• 2013 B8.5 S4, S5 (Europe/Rest of World)
• 2009-2015 C7 A6, A7, A8
• 2010-2015 Q5, Q7

Gen 2 (EA837 EVO) - 2014-2020

The updated generation was designed to meet stricter emissions standards and includes:

• Cast iron cylinder sleeves (1mm thin-wall press-fit)
• Combined fuel injection (both port and direct injection)
• Electromagnetic clutched supercharger that disengages during idle and cruising
• Simos 16 ECU
• Revised timing chain design and graphite-coated pistons

Found in:

• 2014-2016 B8.5 S4, S5 (Europe/Rest of World only)
• 2016-2018 C7.5 A6, A7
• 2016-2018 D4 A8
• 2016-2020 Q7

How to Identify Your Engine Generation

The most reliable way to determine your engine generation is to check your engine code, which can be found on a sticker in your engine bay, in your owner's manual, or on your vehicle registration documents. Match your engine code to the lists above to identify whether you have Gen 1 or Gen 2.

Still not sure which generation you have? Use the vehicle filter above to select your Year, Make, Model, and Engine. We'll automatically show you only the compatible parts for your specific vehicle configuration.