Bosch Common Rail Volkswagen Unit Injector Shim

Bosch CR Volkswagen Unit Injector Shim - 077-121

Volkswagen Common Rail (CR) Unit Injector Adjustment Shim is a critical calibration component used in Bosch diesel unit injectors, designed to maintain injection pressure stability under high pressure and enhance the precision of the fuel injection system. By precisely regulating the amount of fuel injected across almost the entire operating range with micron-level accuracy, it ensures stable engine operation at all RPM levels, maximizes performance, and contributes to the optimization of emission values. Specifically engineered for Bosch unit injection technologies, this high-precision component is a standard part of Bosch common rail systems. With superior surface quality and excellent wear and fatigue resistance, the adjustment shim is manufactured with high precision through a lapping process to meet strict tolerance requirements.