This diesel injector washer is designed for the 2.0 D, 2.0 TD and 2.4 D engine versions of the Audi 100. It ensures sealing at the injector level and its replacement is a common step when overhauling the fuel injection circuit of a classic vehicle. Using a washer in good condition helps maintain injection pressure and prevent any fuel leaks. This new part allows the Audi 100 to restore operation in accordance with its original specifications.