Cayenne's Nav & Dashboard Go Dark: Electrical Mystery

Hey there, I had a similar issue with my 2015 Porsche Macan S last year. The symptoms were nearly identical, navigation system failure, multiple electrical warnings, and dashboard lights going crazy. Turned out to be a faulty BUS system connection where the main control unit cables were damaged and losing connection. Took it to my Porsche certified mechanic, and they diagnosed it using their diagnostic equipment. The repair involved replacing some damaged wiring harnesses and reconnecting the control unit properly. It wasn't a quick fix, they had the car for about three days to ensure everything was working correctly. While it wasn't the most serious mechanical issue, electrical problems in these cars need proper attention because they can affect multiple systems. The BUS system is basically the car's nervous system, so when it fails, you get all sorts of weird symptoms. My advice: definitely get it checked at a Porsche certified workshop. These electrical issues require specific diagnostic tools and expertise. Regular mechanics might not have the right equipment to properly diagnose and fix these systems. Hope this helps!

Thanks for sharing your experience! This sounds exactly like what I'm dealing with. By the way, do you remember roughly how much you ended up paying for the repair? Also, has everything been working smoothly since then, or have you noticed any other electrical quirks popping up?

Hey again! Glad to help! Yes, I remember exactly what I paid, it was 155 Euro for fixing the cable connection to the control unit. The main issue was with the BUS system connection, and I'm happy to report that since getting it fixed at the Porsche workshop, everything has been running perfectly smooth! No more electrical gremlins whatsoever. My Macan's navigation system, dashboard, and all electrical components are working just like new. It was definitely worth getting it properly diagnosed and fixed by certified pros who knew what they were doing. They really got to the root of the problem instead of just patching things up temporarily. I know electrical issues can be super annoying (and sometimes scary when your dash lights up like a Christmas tree!), but once they fixed that communication problem between the control devices, it was like night and day. Haven't had a single warning light or glitch since then. Hope this helps give you a better idea of what you might be looking at. Good luck with your Cayenne! Let us know how it turns out.

Just wanted to update everyone on my Cayenne situation. Took your advice and went to a Porsche certified workshop yesterday. You were spot on, it was indeed a BUS system issue! They found some damaged wiring near the main control unit. The repair cost me about 180 Euro, a bit more than what you paid, but totally worth it. They kept my car for two days, did a thorough check, and fixed everything. The nav system is back to life, no more warning lights, and the speedometer is working perfectly. Really glad I asked here first instead of taking it to a unusual mechanic. The Porsche guys knew exactly what they were doing, and their diagnostic equipment made all the difference. It's such a relief to have everything working normally again! Thanks again for sharing your experience, it really helped point me in the right direction! Fingers crossed it stays problem-free like yours did!