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 rear middle left ultrasonic sensor
Work on the exhaust system may only be carried out when it has cooled down.
Disconnect plug connection (1) and unlock retaining tab (2) in direction of arrow.
Remove ultrasonic transducer.
Installation note:
Before installation of ultrasonic sensor on wiring harness, clean plug connection!
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.
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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.