Front Right ABS/Wheel Speed Sensor - 2011 528i

The 2011 BMW 528i (N52B30) uses Bosch-manufactured wheel speed sensors reading a magnetic encoder integrated into the front wheel bearing. When junkyard hunting, target 2010-2016 F10 5-Series sedans or 2009-2015 F01 7-Series; the 34-52-6-789-702 supersedes to 34-52-6-792-452 but both interchange directly. Inspect the sensor tip for scoring—contact with a damaged bearing encoder ring destroys the sensing element. Remove the 5mm Allen retaining bolt and twist the sensor body counter-clockwise while pulling; corrosion often seizes the plastic body in the knuckle bore. Check the wiring harness 6 inches back from the connector for green corrosion, a common failure point where water traps at the strut tower grommet. Clean the mounting bore with brake cleaner and apply dielectric grease to the O-ring before installing replacement units. Avoid hammering sensors out, as the brittle plastic shatters easily.