Cadillac Buick GM Reverse Radar Probe 85521086 Parking Sensor Eye Replacement

When your Cadillac or Buick experiences frequent radar false alarms (continuous beeping with no obstacle), no response after engaging reverse, or shows “Parking Assist System Off” fault codes, it usually means the rear parking radar probe’s internal sensing element has aged or damaged. The probe normally transmits ultrasound and receives echoes to precisely detect rear obstacles and provides real-time alerts on the dashboard or buzzer; replacement adapts to OEM number 85521086 and is compatible with Cadillac XT5, XT4, CT5, CT6, and Buick LaCK Enclave, Regal, and Envision. Installation notes: disconnect the battery negative first; when removing the old probe, handle clips carefully; install the new probe with the orientation marker facing up and ensure the wiring harness plug is fully locked to avoid false alarms from poor contact.