Mercedes-Benz Fuel Pressure Sensor A0009051100 51CP0803 Common Rail Pressure Valve High Quality

Mercedes-Benz diesel or gasoline engines with common-rail: fuel pressure sensor (rail sensor, OEM A) installed between high-pressure pump and rail; monitors system pressure and feeds ECU to precisely control injection. Symptoms: idle jitter, weak acceleration, starting trouble, or MIL indicating fuel pressure anomaly; sensor failure common. Installation difficulty: medium; advised to be performed by a professional; labor about 0.5–1 hour. Replacing restores stable combustion efficiency and power.