66 20 536 Removing and installing/replacing a rear middle left ultrasonic transducer

Necessary preliminary tasks: 

• Remove rear bumper panel. See 51 12 156 REMOVING AND INSTALLING (REPLACING) REAR BUMPER PANEL .
  Fig 1: Identifying Latch Mechanisms, Ultrasonic Transducer And Plug Connection

  Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 2: Identifying Rubber Ring And Ultrasonic Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

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