BMW 8 Series AC Failure: Compressor Dead or Misdiagnosed?

Hey there! I can relate to this, had a similar issue with my 2016 BMW 6 Series last summer. Initially thought it was the compressor too, but turned out to be the AC control unit that was defective. The symptoms were identical, no response from AC controls and a warning light. Took it to the dealership where they ran a proper diagnostic. The control unit needed complete replacement, not just a repair. It wasn't a quick fix but definitely less severe than a compressor failure. The repair took about a day and a half including parts delivery. Would strongly suggest getting a second opinion from another certified BMW mechanic. While the compressor could be the culprit, these control units are known to fail sometimes. Better to be sure before doing any major work. -

Thanks for sharing your experience! That's really helpful information about the control unit. I'm curious, do you remember roughly how much you ended up paying for the repair? Also, has everything been working smoothly since the fix, or have you noticed any other AC-related issues? Just want to know what I might be in for if it turns out to be the same problem.

Hey again! Yeah, happy to share the outcome. I just had this fixed last month and it ended up costing me 980 € for the control unit replacement. And guess what, it wasn't the compressor after all, just like in my previous case! The mechanic confirmed it was definitely the AC control unit that was acting up. Everything's been working perfectly since the repair. The AC blows nice and cold now, no warning lights, and the controls are all responding properly. Really glad I got that second opinion because replacing a compressor would've cost way more. Trust me, it's such a relief having it properly diagnosed and fixed. Honestly, these control units can be tricky to diagnose, but a good mechanic will test everything thoroughly before jumping to conclusions. If you're still looking for a second opinion, make sure they specifically check the control unit before assuming it's the compressor. Hope this helps with your decision-making! Let me know if you need any other info. -

Hey! Thanks so much for your advice! Just wanted to update you on what happened. I took your suggestion and got a second opinion from another BMW specialist. Turns out you were spot on, it was the control unit! The mechanic ran a thorough diagnostic test and showed me exactly what was wrong. Ended up costing me around 1,100 € for the replacement and labor, but that's still way better than what I would've paid for a new compressor. The repair took about two days because they had to order the part. The AC is working perfectly now, nice cold air and no more warning lights on the dash. Really glad I didn't go with the first diagnosis. The new mechanic even showed me what to look out for in the future, which was super helpful. Thanks again for sharing your experience, saved me from an unnecessary expensive repair. You were absolutely right about getting that second opinion! Take care!