I replaced my cheap Chinese M1/M2 button logic board (lasted 3 months) and wiring with one from Nemgrea at MN Laser Cutting today. Can't recommend his work enough. If you're going to do this upgrade use his product. And his installation video is spot on.
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2019 F31 330i SportWagon | M-Sport | Black Sapphire Metallic over Black Dakota
2016 F31 328i SportWagon | Sport Line | Alpine White over Beige Sensatec (sold - 2019)
2004 B5.5 Volkswagen Passat GLS Wagon | Northern Green | 5-Speed Manual (sold - 2016)
BMW CCA | National Capital Chapter since 2019 - SCCA | Washington DC Region since 2021
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