BMW iX Climate Control Dead: Temp Sensor or Worse?

As a BMW i4 (2018) owner, I faced a similar AC system failure last month. The symptoms were identical, unresponsive controls, error messages, and no cooling. After visiting the authorized service center, they diagnosed it as a faulty wiring harness connection to the climate control module. The cables had developed micro-breaks due to regular vibration, causing intermittent connection issues. The repair involved replacing the wiring harness and recalibrating the climate control system. While not a major mechanical problem, it required specialized diagnostic equipment to pinpoint the exact issue. The car was at the service center for two days. This is apparently a known issue in some BMW electric models, and it's best to have it checked by certified technicians since it's connected to the car's central electronic system. The problem hasn't returned since the repair. Hope this helps with your decision making. Let me know if you need any other info about the repair process.

Thanks for sharing your experience! I had a very similar issue with my iX, and the wiring harness connection problem you mentioned sounds exactly like what I went through. Can't remember if you mentioned the repair cost, would you mind sharing what you paid? And has everything been running smoothly since the fix? Just want to get an idea of what I might be looking at cost-wise and if any other issues popped up afterward.

Hey there! Thanks for asking about the costs. Yes, everything's working perfectly now, such a relief! The mechanic found it was indeed a faulty interior temperature sensor, just like we suspected. The issue was actually pretty straightforward, just a dodgy cable connection to the sensor that needed fixing. The total bill came to 95€, which honestly wasn't as bad as I was expecting. Since getting it sorted, the AC's been working like a charm, no more error messages, temperature control's responsive again, and the cooling's spot on. It's been about a month now, and I haven't had a single problem with the system. Really glad I went to get it checked out rather than letting it drag on. These electronic issues can be tricky, but sometimes it's just something simple like a loose connection. Just make sure whoever looks at it knows their way around BMW's electronics, that's crucial with these modern cars. Let me know how yours works out. Always good to hear if others are having similar experiences with their BMWs.

Thanks so much for all that info! I actually just got back from the mechanic today. You wouldn't believe it, my issue was almost identical to yours, but my repair story took quite a different turn. The first mechanic I went to kept the car for three days and couldn't figure it out. Finally went to another shop that specializes in European cars, and they spotted the problem in just a couple of hours. Turned out my sensor was completely shot, not just a loose connection. Had to replace the whole unit plus some surrounding wiring. Bit pricier than your repair, set me back about 280€. But honestly, I'm just relieved it's fixed. The AC's working perfectly now, and the error messages are gone. The specialist mechanic explained everything really well and even showed me the damaged parts. Definitely learned my lesson about going to mechanics who know these high-tech systems. Thanks again for sharing your experience, it really helped me understand what I was dealing with!