BMW iX3 Alarm System Acting Up: Random Triggers & Failures

Hey there! I have some experience with EVs and went through something very similar with my 2019 BMW i4. Also had issues with the alarm system acting up, super annoying when it goes off for no reason! Took it to my regular workshop and it turned out to be a faulty cable connection to the alarm module. The technician found some loose wiring that was causing intermittent connection issues. The repair was pretty straightforward, they had to replace and secure the connection properly. Cost me 95 Euro, but totally worth it for the peace of mind. Quick question, are you getting any specific error codes? Also, does it happen more frequently when it's particularly cold or wet outside? This could help pinpoint if it's the same issue I had. The i4 and iX3 share quite a few electrical components, including similar alarm systems. I've also seen comparable issues with the BMW iX, so it seems to be something that pops up occasionally in their EV lineup. Let me know those details and I might be able to share more specific info from my experience!

Thanks for sharing your experience! My iX3 has just hit 97,488 KM and I've been experiencing these issues for about a week now. To answer your questions, I'm getting error code E362B1 on the system, and yes, it does seem to act up more when there's high humidity. It's particularly frustrating because it went off twice in the middle of last night. I had it serviced just last month and everything else is running perfectly, it's just this alarm situation that's driving me crazy. I'll definitely check with my service center about the cable connections you mentioned. Did your technician mention anything about how to prevent this from happening again in the future? I'd rather not have to deal with this becoming a recurring issue.

Hey again! Thanks for providing those details about your iX3. The error code and humidity sensitivity you mentioned actually sound really familiar, that's exactly what I experienced with my i4 before getting it fixed! When my technician fixed the cable issue, he actually gave me some useful tips to prevent future problems. He recommended regularly checking the rubber seals around the doors and trunk, as water seepage can affect the connections over time. Also suggested applying some dielectric grease to the connections during maintenance to prevent corrosion from humidity. Since my repair, I've followed his advice and haven't had any issues for the past 8 months. Though I did notice the alarm acting slightly weird during one really humid week, but just a quick check of the connections sorted it out, no full repair needed. The 97,488 KM on your iX3 is quite similar to what mine had when the problem started (around 95,000 KM). It seems to be a common mileage point for these issues to pop up. Definitely get those cable connections checked, it's a relatively simple fix that could save you from more sleepless nights! Let me know how it goes after you visit the service center. I'm curious if it turns out to be the same issue!

Thanks so much for that detailed follow-up! Your experience with the cable connections and humidity issues really helps confirm my suspicions. I just called my service center and managed to get an appointment for next week. They seemed familiar with the problem when I mentioned the E362B1 error code and the humidity connection you pointed out. It's honestly such a relief to know this is likely a straightforward fix rather than some major system failure. Those maintenance tips about checking the rubber seals and using dielectric grease are super helpful too, definitely going to implement those once everything's fixed. Really appreciate you taking the time to share your experience and advice! Will update you once I get it sorted. Fingers crossed it's just those pesky cable connections and nothing more serious. Thanks again for all the help!