This replacement engine coolant thermostat housing assembly is engineered to match the fit and durability of the stock housing assembly on specified vehicles. It is designed to withstand extreme temperature changes to extend service life. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Audi A6 Quattro: 2007, 2008, 2009, 2010, 2011] - [Audi A8 Quattro: 2007, 2008, 2009, 2010] - [Audi Q7: 2007, 2008, 2009, 2010] - [Audi S6: 2007, 2008, 2009, 2010, 2011] - [Audi S8: 2007, 2008, 2009, 2010] - [Volkswagen Touareg: 2007, 2008, 2009, 2011, 2012, 2013, 2014, 2015, 2016, 2017]