Learn how to replace BMW turn signal switch that is mounted on the steering column.
This guide only shows you how to replace the turn signal level (stalk). If your BMW turn signal switch fails you may experience various problems including:
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.
Follow these steps to learn how to change BMW turn signal switch.
Disconnect the battery negative terminal.
A detailed step by step guide on how to replace BMW battery can be found here.
Remove airbag from driver's steering wheel.
Detailed instructions on how to replace BMW steering wheel and airbag can be found here.
Remove steering wheel.
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.
Remove turn signal stalk arm from the steering column switch unit known as the SZL unit.
Avoid rotating the clock spring otherwise, you may need to perform steering angle sensor calibration.
BMW E46 Steering Column Switch Replacement by PelicanParts.com
BMW Steering Angle Sensor Calibration by YOUCANIC
Troubleshoot BMW SZL, Steering Angle Sensor Problems by YOUCANIC
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My problem is the right turn signal will not stop flashing. I have to turn the switch to the left signal to get the right to stop flashing. I was trying to figure out if it's the signal switch or if I have an LCM problem