BMW 7 Series Wipers Going Haywire? Fix Guide Inside

I had a similar issue with my 2012 BMW 5 Series 520d. The unusual wiper activation and system failures were quite frustrating. Last month at the garage, they diagnosed it as a faulty connection in the rain sensor module and corroded terminals in the wiper control module. The fix required replacing the rain sensor, cleaning the module connections, and updating the control unit software. It wasn't a major mechanical issue, but it needed immediate attention as it affected visibility and safety. The repair took about 3 hours. The mechanics also found some water ingress near the windscreen that was causing the connection problems. Since fixing these issues, the wipers have worked perfectly, no more unusual activations or failure to respond. Just make sure you get a certified BMW specialist to look at it, as they'll have the right diagnostic tools for the error codes. The wiper system in these models is quite complex with its integrated rain sensors and control modules.

Hey there! Thanks for sharing that. I went through something really similar with my own BMW. Had it fixed about 6 months ago and it's been working fine since then. Can't help but wonder, do you remember roughly how much you ended up paying for the whole repair? Also, has everything been running smoothly since the fix, or have you noticed any other quirks popping up? Just asking because these electrical gremlins can be tricky, and I'm curious if the fix was a permanent solution for you. Sometimes these wiper issues can be connected to other systems too.

Hey again! Thanks for following up about the repair costs. Happy to report that everything's been working perfectly since I had it fixed, not a single problem with the wipers. The total cost came to 95 € which covered fixing a dodgy cable connection in the wiper control module. Much cheaper than I initially feared! It's such a relief not having to deal with those unusual wiper activations anymore. You know how annoying that was, especially when driving at night. The mechanic really knew their stuff with these BMW electrical systems, and it looks like they nailed the problem first time. Haven't noticed any other electrical issues either, everything's running like clockwork. Seems like catching these problems early is key. The peace of mind was definitely worth the repair cost. Let me know if you spot anything else weird with yours, always good to compare notes on these things!

Thanks for the detailed update! Yeah, my experience was pretty similar. I finally took mine to a specialist mechanic after putting it off for a while. The total damage was around 380 bucks, more than yours because they had to replace the entire rain sensor unit and do some rewiring. Bit pricey, but honestly worth every penny. The mechanic was super thorough and spotted some corrosion they cleaned up too. Been about half a year now, and the wipers work perfectly, no more ghost activations or system failures. Such a relief not having to deal with that headache anymore, especially during bad weather. Funny how we both had almost the same issue. Really glad I asked here and got your input before taking it in. Having someone else's experience definitely made me feel more confident about getting it fixed. Thanks again for sharing your story, it helped more than you know!