66 20 517 Removing and installing/replacing a front center left ultrasonic sensor (S63)

Necessary preliminary tasks: 

• Remove front bumper panel. See 51 11 156 REMOVING AND INSTALLING (REPLACING) FRONT BUMPER PANEL .
  Fig 1: Locating Ultrasonic Sensor Plug Connection

  Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Unclip ultrasonic sensor (2) from retaining tabs.

Installation note: 

Before installation of ultrasonic sensor (2) on wiring harness, clean plug connection!

Retaining tabs must not be damaged.

Make sure ultrasonic transducer (2) is securely seated.

Installation note: 

Make sure rubber ring (1) is correctly seated on ultrasonic sensor (2).

Fig 2: Identifying Rubber Ring And Ultrasonic Sensor

Courtesy of BMW OF NORTH AMERICA, INC.