This coolant recovery expansion tank is designed for Q7 4L (B8) vehicles manufactured between 2006 and 2015 that require 7L0121407C.It serves as a direct replacement for the component and is engineered to deliver consistent performance in compatible models.The tank helps maintain proper cooling system pressure and fluid levels, supporting thermal management.Compatible with vehicles using part numbers 7L0121407C, 7L0121407E, 7L0121407F, and equivalent variants.Designed for straightforward installation without modifications.