Where is the BMW 320 reversing radar module located?
2 Answers
BMW 320 reversing radar module is installed on the left side of the trunk. Reversing radar related information is as follows: Introduction to reversing radar: The reversing radar belongs to the major category of electronic/electrical systems. The full name of the reversing radar is "reverse anti-collision radar", also known as "parking assist device". It is a safety assist device for car parking or reversing, consisting of ultrasonic sensors (commonly known as probes), controllers and displays (or buzzers). Composition of reversing radar: The reversing radar mainly consists of ultrasonic sensors, controllers and displays or buzzers. Ultrasonic sensor: The main function is to send and receive ultrasonic signals, and then input the signals into the host, which are displayed through the display device. Controller: Processes the signals and calculates the distance and orientation between the vehicle body and obstacles. Display or buzzer: When the sensor detects that the distance between the car and the obstacle reaches a dangerous distance, the system will issue an alarm through the display and buzzer to remind the driver.
As a technician who frequently works on BMWs, the parking radar module for the BMW 320 is typically located inside the trunk area, mostly in the left corner of the trunk, behind the plastic trim panel when you lift the rear door. Specifically, you'll need to remove the left-side trim panel in the trunk to see it, usually a small black box connected to the radar sensors. Common locations include under the trunk floor or inside the rear bumper, but the 320 model tends to place it on the trunk side to minimize vibration interference. If the module fails, it may cause slow radar response or false alarms—it's recommended to first check for loose wiring connections before handling the module. When replacing it, don’t forget to disconnect the battery to prevent short circuits. The location may vary by model year; older versions are more likely to be found inside the bumper, while newer ones are integrated into the trunk system, so consulting the vehicle manual before starting is the safest approach.
