Adaptive Cruise Control Radar - 2011 528i

The Adaptive Cruise Control radar for the 2011 BMW 528i (F10 chassis) serves as the eyes of the Active Cruise Control system (option S541), mounting behind the kidney grille to monitor traffic ahead. This Bosch-manufactured component typically carries BMW part number 66 20 6 862 507 or its direct replacement 66 20 6 868 686, often revealing casting marks like 0 265 006 306 on the black plastic housing. Interchange compatibility spans 2010-2013 F10/F11 5 Series and F07 5 GT models, though junkyard hunters must avoid 2014+ LCI facelift units with incompatible mounting tabs. When inspecting salvage units, verify the three plastic mounting ears remain unbroken—collision damage often cracks these before the sensor itself fails—and check the radar lens for stone chips or water intrusion that causes internal condensation. Installation demands immediate calibration via BMW ISTA to align the radar beam within 0.5 degrees; skipping this step triggers 'ACC Malfunction' warnings and potential unwanted braking events.