Replacing SZL in BMW

2015-2019 BMW 2 Series, 3 Series and 4 Series vehicles may present a condition where the windshield wipers may switch on by themselves and can no longer be switched off despite activation of the switch, due to an internal software error in the SZL (steering column switch cluster).

Information courtesy of Mitchell 1

Mike Mavrigian

Feb. 20, 2023

The correction involves the replacement of the SZL. The SZL does not require programming/coding after replacement.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

Mike Mavrigian

Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.