3B0121321 Coolant Reservoir Cap, Expansion Tank Cap Compatible with 1999-2018 Audi A3 A4 A5 A6 Q5 S3 S4 S5 TT | Volkswagen Amarok Beetle Bora Crafter Van Eos Gol GTI Jetta Passat Touareg etc
When Should I Replace My Engine Coolant Reservoir Cap? - The radiator cap is a sealing cap installed on the radiator or expansion tank filler port, it is not only a simple cap, but also has a pressure regulating function and is an important part of the cooling system. If your car is experiencing problems such as coolant leaks, engine overheating, abnormal cooling system pressure, and a deteriorated or damaged radiator cap, you may need to replace your coolant cap.
Replacement Part Numbers - 3B0121321. This radiator cap replacement is used on many cars. Please check the detailed description or enter Year/Make/Model to check your compatibility before purchasing this expansion tank cover.
Compatible with Select Audi Models - 2011 - 2017 Audi A1, 2006 - 2016 Audi A3, 2006 - 2016 Audi A3 Quattro, 2016 Audi A3 Sportback e-tron, 2005 - 2015 Audi A4, 2013 - 2016 Audi A4 allroad, 2005 - 2015 Audi A4 Quattro, 2008 - 2016 Audi A5, 2008 - 2017 Audi A5 Quattro, 2012 - 2017 Audi A6, 2012 - 2017 Audi A6 Quattro, 2016 - 2017 Audi A7, 2012 - 2017 Audi A7 Quattro, 2013 - 2016 Audi allroad, 2009 - 2017 Audi Q5, 2007 - 2008 Audi RS4, 2014 - 2017 Audi RS7, 2004 - 2012 Audi S3, 2005 - 2015 Audi S4, 2008 - 2016 Audi S5, 2013 - 2017 Audi S6, 2013 - 2017 Audi S7, 2014 - 2017 Audi SQ5, 2003 - 2014 Audi TT, 2003 - 2014 Audi TT Quattro.
Direct Replacement - Perfect match, direct replacement. This coolant overflow tank cap is made from premium materials to ensure superior quality and long-lasting performance. This is not a genuine part, but an aftermarket replacement. We have strict quality control standards to ensure high performance. If you have any questions or concerns, please feel free to contact us.