Remote Parking Control System — Basic Information and Component Replacement (BMW 3 Series E46)

Basic information

1. To make parking easier, BMW 3 Series cars are equipped with a system that informs the driver of the distance between the rear of the car and any obstacle behind the car. The system consists of several ultrasonic sensors mounted on the rear bumper that measure the distance between the bumper and the nearest obstacle. Information about this distance is transmitted to the driver in the form of an audible signal. The smaller the distance to the obstacle, the higher the frequency of the signal becomes. If the distance becomes less than 30 cm, the signal becomes constant

System control unit

Removal

2. On sedan and coupe models, remove the right luggage compartment trim panel (see chapter 11, paragraph 27).

3. In the "tourist" model, lift the luggage compartment floor panel. Unscrew the nut and remove the spare wheel cover. Unscrew the two mounting nuts and remove the panel located between the spare wheel and the rear seat (Fig. 26.3).



4. On all models, disconnect the electrical wiring connectors from the unit, making a note of their location. Unscrew the mounting screws and remove the control unit (fig. 26.4, a, b)

Installation

5. Installation is carried out in the reverse order of removal.

Ultrasonic sensors

Removal

6. Remove the rear bumper (see chapter 11).

7. Disconnect the sensor wiring connectors, detach the clips and remove the sensors from the bumper.

Installation

8. Installation is carried out in the reverse order of removal