BMW i4 Climate Control System Fails, Sensor Issue?

I faced a similar issue with my 2018 BMW iX3 last month. The climate control system went completely dead, showing error messages like yours. Turned out it was indeed the temperature sensor connection, but not the sensor itself. The technician found that the wiring harness connecting to the sensor had some corrosion and a loose connection. This was causing intermittent failures and eventually complete system shutdown. They had to clean the connection points and replace part of the wiring harness. While not a serious mechanical issue affecting the car's core functions, it needed immediate attention as it could potentially affect the battery thermal management system. The repair was pretty straightforward once they identified the exact problem. Make sure whoever works on it has experience with electric BMW models, the climate control system is more complex than in conventional cars due to its integration with the battery cooling system.

Thanks for sharing your experience! That's really helpful to know about the wiring harness, sounds exactly like what I'm dealing with. I'll make sure to have them check the connections and wiring first before replacing the whole sensor unit. Just curious, do you remember roughly how much you ended up paying for the repair? Also, has everything been working smoothly since they fixed it?

Hey there! Yes, definitely wanted to follow up on this. The repair turned out great, after seeing the mechanic, they identified and fixed the faulty interior temperature sensor. The main issue was actually just a problematic cable/plug connection to the component, not the entire sensor unit thankfully. The total cost came to 95 € for the repair, which was a relief since I was worried it might be something more serious (and expensive!). Everything's been working perfectly fine since then, the climate control system is back to normal, no more error messages, and the AC is running smoothly. Such a difference compared to before! It was definitely worth getting it checked by someone who knows these electric models well. These things can be tricky, but once you find the right issue, the fix is usually pretty straightforward. Really glad I could help point you in the right direction with this!

I just wanted to update everyone on my BMW i4 climate control situation. Finally got it sorted out today! After checking a few repair shops, I found a technician who really knew their stuff with electric vehicles. Just like mentioned, it turned out to be a wiring issue, some corrosion on the connections to the temperature sensor. The mechanic cleaned up the connection points and replaced a small section of the wiring. The whole thing only took about an hour and cost me around 85 bucks, which was way less than I expected. The best part? The AC is working perfectly now! No more error messages, and the auto temperature control is back to normal. Such a relief it wasn't something more serious. Really glad I asked here first, saved me from potentially replacing the entire sensor unit unnecessarily. Thanks again everyone for the help, especially for sharing their experience. If anyone else runs into similar issues with their i4, definitely get those wiring connections checked first!