Racing Thermostat, fits Audi A4 1.8T 1997-2001 / TT 1.8T/3.2L 2000-2006
For 2009 Audi A4 Quattro Thermostat 91361MK 3.2L V6 Base Thermostat Housing | eBay
Audi Thermostat Assembly (MAHLE-OEM) for B6-A4 1.8T
Racing Thermostat, fits Audi A4 2.8L 1996–2000
Audi A4 B6 Thermostat Replacement (2002-2008) | Pelican Parts DIY Maintenance Article
Audi Thermostat Assembly (OEM-Wahler) for B7-A4 2.0T
SOLVED: REPLACING THERMOSTAT FOR AUDI A4 2.8 - Fixya
Audi Thermostat (A4 B7 2.0T, OEM) 06D121111G by Behr Hella | Europa Parts
Audizine Forums
Audi A4 B6 Thermostat Replacement (2002-2008) | Pelican Parts DIY Maintenance Article
Car Auto Engine Coolant Thermostat Housing Assembly 06B121111K for Audi A4 Quattro 2002 2003 2004 2005 2006 Car Accessories|Thermostats & Parts| - AliExpress