Windows issue, sometimes the master switch would work sometimes it would not?

2009 BMW 335
120,000 MILES • 6 CYL • TURBO • 2WD • AUTOMATIC
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BHAMDOC1973
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  • 2,007 POSTS
Problem started where sometimes the master switch would work sometimes it would not. Last week it did not work once. But if i use the passenger side switch it would roll down. This is a convertible. If i put the top down the windows roll down a bit for the top to go down. But now nothing moves from master switch. Also mirrors wont work
Sep 25, 2023 at 5:15 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
We just had this problem in the shop and replacing the main control switch fixed it. Here is how to do the job. Check out the images (below). Please let us know if you need anything else to get the problem fixed.

Sep 27, 2023 at 8:37 AM
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