In this guide, you will find instructions on how to change the turn signal switch and cruise control switch on a BMW vehicle. 

What you will need

• BMW Turn Signa Switch
• Mechanic Toolset Metric
• Torx Socket Set
• Torque Wrench

Procedure

Follow these steps to learn how to change the BMW turn signal switch.

1. Disconnect the negative terminal.  
2. Remove the airbag from the driver's steering wheel. Detailed instructions on how to replace BMW steering wheel and airbag can be found here. 
3. Remove the steering wheel. 
4. Pull up the plastic trim away from the steering column. There usually is a couple of screws below the bottom trim that need to be removed. 
5. Remove turn signal stalk arm from the steering column switch unit known as the SZL unit.
6. Avoid rotating the clock spring otherwise, you may need to perform steering angle sensor calibration.

Symptoms of a bad turn signal switch

If your BMW turn signal switch fails you may experience various problems including:

• BMW turn signals not working
• Turn signal stalk does not cancel
• One of the turns signals not working
• Turn signal switch does not stay in place
• High beam switch/flashers not working
• Cruise control not working

It is important to properly diagnose the problem before any BMW parts are replaced.

We recommend that an auto mechanic that specializes in BMW properly diagnoses your car.

If you prefer to diagnose your BMW yourself, you will need a BMW scanner that can read fault codes. Make sure to check fuses, relays, SZL module if your BMW turn signals don't work.