Bosch 0281002858 Fuel Pressure Regulator

The Bosch 0281002858 is a DRV-USAK/30S type fuel rail pressure regulator (metering unit) designed for high-pressure common rail diesel injection systems. It controls fuel pressure in the rail by metering the flow from the high-pressure pump based on ECU demand signals. The valve operates as a normally closed solenoid actuator. Technical specifications include a maximum operating rail pressure of 1800 bar, inlet work pressure rating of 0.75 MPa, internal leakage less than 20 ml/min, and an operating temperature range of -40°C to 120°C. The component features a 12V electrical connector and is constructed with high-temperature resistant materials for durability in engine bay environments. OEM cross-references include Volkswagen Group part numbers 057130764H, 03L906054A, 057130764AM, and fuel rail assembly 059130090AH. Interchangeable manufacturer part numbers include 0281006002, 0281002859, and 0281006003.