Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
66 20 536 Removing and installing/replacing a rear middle left ultrasonic transducer
Necessary preliminary work:
- Version with trailer tow hitch only: remove rear BUMPER PANEL .
Lever out expanding rivets (1).
Unfasten screws (2).
Remove trim (3).
Unlock plug connection (1) and disconnect. Unlock latch mechanisms (2) and pull ultrasonic transducer (3) out of bracket.
Installation note:
Before installation of ultrasonic sensor (3) on wiring harness, clean plug connection!
Retaining tabs (2) must not be damaged!
Make sure ultrasonic sensor is securely seated.
Installation note:
Make sure rubber ring (1) is correctly seated on ultrasonic sensor (2).
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.