What Is the SZL (Steering Column Switch Cluster) and What Does It Control?
Articlebeginner 1 min read Video Guide
E-series (1987-2013)F-series (2010-2019)G-series (2018-present)SZL #SZL #steering-angle-sensor #clock-spring #ribbon-cable #ECU #steering-wheel #DSC
The SZL (Steering Column Switch Cluster) is a BMW ECU behind the steering wheel that controls the steering angle sensor, wheel buttons, turn signals, and airbag clock spring. Its most common failure is the internal ribbon cable, which degrades after 8-12 years of use.
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