Cast Aluminum Thermostat Housing for A4 chassis TDIs, (BEW). The stock plastic is a weak point in the cooling system on the BEW. The housing gets brittle with age and often breaks when removing to access the thermostat. 
 
Includes O-ring
Lifetime Warranty
 
Volkswagen
Golf TDI MkIV (A4 chassis) w/ BEW Engine (2004-2006)
Jetta TDI MkIV (A4 chassis) w/ BEW Engine (2004-2005)
Jetta Wagon TDI (A4 chassis) w/ BEW Engine (2004-2006)
New Beetle TDI (A4 chassis) w/ BEW Engine (2004-2006)