Electrical problems in BMW – simultaneous malfunction of radio, horn, windshield wipers

BMW driver’s question

The horn, multifunction steering wheel, seat heater, rear wiper and radio all stopped working at one point. I checked all the fuses and found no problem there. As far as I know, these components are not interconnected. What could be the reason for such a failure?

The problem was in a 1998 BMW 528 E39 touring, but it can happen in other models as well.

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