Lane change warning, slave

NOTE: As of F15, the slave of the lane change warning is located in the rear right. For the other vehicles, rear left.

The slave of the lane change warning (SWW) is exclusively a radar sensor and not a control unit. However, this radar sensor has a programmable memory and a separate processor. The radar sensor is installed in the rear left above the bumper support. From the outside, the radar sensor is not visible, rather it is covered by the bumper.

Fig 1: Identifying Lane Change Warning Related Components (Slave)

Courtesy of BMW OF NORTH AMERICA, INC.

Example F01

Item	Explanation
1	Lane change warning, slave
2	Mounting bolts
3	12-pin plug connection

The purpose of the radar sensor is to generate and send the radar waves. There is an integrated receive circuit. Signals are sent and received across a flat aerial.

The mounts of the radar sensors cannot be adjusted mechanically. Instead of adjusting the radar sensors mechanically (in the same way as e.g. the long-range sensor of the active cruise control), a correction angle must be stored via diagnosis.

The radar sensors are distinguished by the attachment points. This way they cannot be confused.