Mercedes-Benz E260 E260L Left Rear ABS Sensor A2129050400 High Quality Replacement

Your Mercedes-Benz E260 or E260L may show ABS fault warning on the dash with abnormal brake pedal vibration or uneven braking force, or ESP warning; typically indicates left-rear ABS sensor aging or damage causing wheel speed signal loss. When functioning normally, the sensor monitors wheel speed in real time and transmits data to the ABS control unit to prevent wheel lock during emergency braking and support ESP and traction control system intervention. This product OEM number A2129050400, fits Mercedes-Benz E260 (W212) and E260L; during installation be sure to disconnect the negative battery, clean ferrous debris and dirt from the sensor mounting hole, and ensure uniform gap between sensor and tone ring (about 0.3–0.8 mm) to avoid over-tightening or looseness causing signal anomalies.