BMW XM Washer System Failure, Multiple Functions Affected

Hey there! I had a pretty similar issue with my 2020 BMW X7 (and previously owned an X5). I have some experience working on cars, mostly basic maintenance stuff. My washer system acted up exactly like yours, no spray, wipers going crazy. Turned out the cable connection to the washer pump was corroded and partially disconnected. My trusted workshop found it during diagnostics, and they had to replace some wiring and a relay. Total bill came to 165 Euro, and it's been working perfectly since then. Could you share which warning lights you're seeing on the dash? Also, do you hear any humming sound when you try to use the washers? This would help me understand if you're dealing with the same problem I had.

Thanks for sharing your experience! For my XM (at 81510 KM), it's a bit different, I don't hear any humming noise when activating the washers, just complete silence. No warning lights on the dash either, which makes it more puzzling. Was just at the dealership for service last month, so it's extra frustrating this popped up now. Do you remember if your washer fluid sensor was still working when you had this issue? Mine shows the tank is full, but I'm wondering if I can trust that reading given everything else.

Hey again! Yes, I totally get your frustration, car issues right after service are super annoying. My situation with the X7 was actually pretty similar to what you're describing now. The washer fluid sensor was showing full even during the problem, and that reading was accurate. Since you're not hearing any pump noise at all (just like my case initially), I'm now thinking it might be more of an electrical issue than just a corroded connection like I had first suggested. When my trusted mechanic dug deeper, they found that the pump itself had failed, it wasn't just the wiring as they first thought. That would explain the complete silence when trying to activate it. Have you checked your fuse box yet? Before taking it back to the dealer, might be worth checking the fuses, that's one thing I wish I'd done before paying for diagnostics. The auto wiper function failing at the same time definitely points to an electrical gremlin somewhere in the system. Let me know if you end up taking it in, really curious if it turns out to be the same issue. These newer BMWs can be tricky with their electrical systems sometimes!

Thanks for the detailed follow-up! You're right about checking the fuses, that's actually a really good suggestion I hadn't thought of. I just went out and checked the fuse box, but all the relevant fuses look good. It's definitely sounding more and more like my issue could be similar to what you experienced with the pump failure. I've scheduled an appointment with my dealer for next week. Really hoping it's not going to be some complicated electrical issue that takes forever to diagnose. The timing is terrible too since we're heading into winter weather. I'll definitely update you once I know what's going on. Your experience with the pump failure gives me at least something specific to mention when I take it in. Really appreciate you taking the time to share your insights!