66 20 534 Removing and installing/replacing a rear left ultrasonic transducer (N20)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, 2015 BMW 328i xDrive, 2015 BMW 328d xDrive, and 2014 BMW 328i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Risk of burning!
Work on the exhaust system may only be carried out when it has cooled down!

Lever out expanding rivets (1).

Unfasten screws (2).

Unscrew nut (3).

Feed out cover (4) downwards.

Installation note:

If necessary, replace faulty expanding rivets (1).

Fig 1: Identifying Screws And Expanding Rivets

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Ultrasonic transducers (3) can be reached from below with bumper installed.

Unlock plug connection (1) and disconnect.

Unlock latch mechanisms (2) and pull ultrasonic transducer (3) out of bracket.

Installation note:

Fig 2: Identifying Plug Connection, Tabs And Ultrasonic Transducer

Courtesy of BMW OF NORTH AMERICA, INC.

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).

Fig 3: Identifying Rubber Ring And Ultrasonic Transducer

Courtesy of BMW OF NORTH AMERICA, INC.