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 20 518 Removing and installing/replacing a front, side ultrasonic transducer
Necessary preliminary work:
- Remove wheel arch cover . See 51 71 038 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH COVER (FRONT SECTION) or 51 71 038 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH COVER (FRONT SECTION) at front.
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
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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.