Oil Pressure Sensor/Switch - 2011 528i E90

The BMW oil pressure sensor 12617567723 serves dual pressure and temperature monitoring duties on the N52 inline-six, making it a common failure point that manifests as oil weeping through the sensor body, erratic dashboard gauge readings, or DTCs P0520/P0521. Located atop the oil filter housing beneath the intake manifold on the F10 528i, replacement requires a 24mm deep socket, patience with the brittle wiring harness clip, and a new O-ring to prevent seepage. When junkyard hunting, target 2007-2012 E90 328i sedans or 2011-2012 F10 528i donors; verify the Bosch casting 0 261 230 340 stamped on the hex body and inspect the 3-pin connector for oil contamination, which indicates internal diaphragm rupture. Always match the connector color (typically blue for 2008+ N52) and confirm the donor engine is the naturally aspirated N52B30, as the 2012+ turbocharged N20 uses incompatible electronics and mounting geometry.