General description Car Coolant Expansion Tank is designed for VW Touareg and Audi Q7 models, providing a reliable solution for coolant overflow management. This radiator overflow bottle is engineered to withstand heat and vibrations, preventing cracks and leaks while maintaining a closed cooling system to minimize coolant loss and avoid air inflow, which can lead to oxidative corrosion of engine parts. Technical specifications Part Numbers: 7L0121407E, 7L0121407F, 7L0121407C Interchange Part Numbers: 95510614721, 95510614722, 95510614723 Other Part Numbers: 1J0121321B, 1J0121321A, 1J0121321, 1C9121321, 95510644720 Compatible Models: 2003-2006, 2008-2010 VW Touareg and Audi Q7 Engine Types: 3.6L V6 (2007-2010), 4.2L V8 (2007-2010), TDI (2009-2010, 2011-2015) Color: Black Material: Plastic Dimensions: Measurement allowed error is +/- 1-3 cm Installation Easy to install with no complicated tools required, saving time and effort. Usage This coolant expansion tank is designed to provide