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Hi Everyone, Am new at this, apologies if I break any protocols! I need your help; I have a mechanical issue with my Audi A3 2009 hatchback. Issue manifested itself by having light failure warning on the car and hazard lights turning themselves on when the engine is switched off. I took it to the garage who 'cold rebooted' the vehicle by removing one of the battery terminal. This caused BCM Onboard supply unit, Part No: 8P0907063D to blow on one of the input sockets. I am currently seeking a replacement but my question is; what would have caused the motherboard to blow? I am afraid of replacing it and the same scenario happening. Any advice will be highly appreciated. Regards, Martin
