51 12 157 Replacing rear bumper trim (M Aerodynamics package)

Necessary preliminary tasks: 

• Remove REAR BUMPER PANEL 
• REMOVE AND INSTALL REAR BOTTOM BUMPER TRIM COVER 
• Remove and install left and right rear reflector
• Remove and install rear ultrasonic sensor. See 66 20 534 REMOVING AND INSTALLING/REPLACING A REAR LEFT ULTRASONIC TRANSDUCER (PARK DISTANCE CONTROL) , 66 20 536 REMOVING AND INSTALLING/REPLACING A REAR MIDDLE LEFT ULTRASONIC TRANSDUCER (PARK DISTANCE CONTROL) , 66 20 537 REMOVING AND INSTALLING/REPLACING A REAR MIDDLE RIGHT ULTRASONIC TRANSDUCER (PARK DISTANCE CONTROL) or 66 20 535 REMOVING AND INSTALLING/REPLACING A REAR RIGHT ULTRASONIC SENSOR (PARK DISTANCE CONTROL) .