BMW iX3 Wiper System Failure, Common Relay Issue?

I had a similar issue with my 2018 BMW i3s last month. The wipers completely failed during operation, and the error code pointed to a faulty connection. It turned out the wiper motor cable harness had corroded at the connection point, causing intermittent failures before completely stopping. The repair wasn't too complex, but it required specific diagnostic equipment to properly identify the issue. The technician had to remove several components to access the wiper assembly and replace the damaged wiring harness. The connection between the body control module and the wiper motor also needed cleaning and resealing. While not a severe mechanical issue, it's definitely something that needs immediate attention for safety reasons. My car had around 170,000 KM when this happened. Based on your description, it sounds very similar to what I experienced. Make sure whoever works on it has experience with BMW electrical systems, as these connections are model-specific and need proper handling. The fix has been solid since then, no more issues with the wipers. Hope this helps with your decision.

Thanks for sharing your experience! I'm relieved to hear I'm not the only one who's dealt with this. My symptoms sound exactly like what you described, definitely seems like it could be that wiring harness issue. Quick question, do you remember roughly how much you ended up paying for the repair? Also, has everything stayed working properly since then, or have you noticed any other electrical quirks? Really appreciate your help with this!

Hey there! Glad I could help, and thanks for asking about the follow-up. I actually just got my car back from the mechanic last week, and I'm happy to report it's all sorted now. They confirmed it was indeed the faulty wiper relay, exactly what I suspected. The total bill came to 95 € for fixing the cable and plug connection that was acting up. The best part is everything's working perfectly now, both auto and manual modes are smooth as butter. Haven't noticed any other electrical issues at all since the repair. The wipers are responding instantly when I need them, which is such a relief. Trust me, once you get it fixed, you'll feel much better about driving in wet weather! I know you were worried about finding a trustworthy mechanic after your previous experience. If you're still looking, I'd be happy to share what made me confident about choosing mine. They really knew their stuff when it came to BMW electrical systems. Let me know if you need any other details about the repair process!

Thanks so much for all this helpful info! I finally got my car looked at yesterday and you were totally right, it was the wiring issue. Took it to that certified mechanic you mentioned, and I'm actually really impressed. They found the problem right away and fixed it within a day. Cost me about 120 € in total, which wasn't as bad as I was expecting. The mechanic walked me through everything they did, showing me the corroded wiring they replaced. Much better than my last experience where I felt completely in the dark about the repairs. Just drove home in the rain, and the wipers are working perfectly, both auto and manual modes. Such a relief! Really glad I asked for advice here instead of going back to my old mechanic. You saved me from another potentially frustrating experience. Thanks again for sharing your story, it helped me make the right decision!