BMW i5 Cruise Control Failure: Diagnosis & Solutions

Hey there! I had a similar issue with my 2021 BMW iX3. The cruise control failure turned out to be a faulty connection in the wiring harness that connects to the radar sensor. The connector had some corrosion build-up, which caused intermittent communication errors. The fix wasn't particularly complex, they cleaned the connector pins and replaced a damaged cable segment. It was covered under warranty since these connections are meant to last longer. Not a serious mechanical issue, but definitely something that needs proper attention since it affects a safety feature. My suggestion would be to take it to a certified BMW dealer since they're more familiar with the electrical systems in these EVs. These newer models have complex sensor networks, and proper diagnostic tools are essential. Would definitely get it checked soon though, in my case, the cruise control issue was just the first symptom, and ignoring it could've led to other driver assistance systems acting up. Best of luck with the repair.

Hey again! Thanks for sharing that, it sounds exactly like what I'm experiencing with my i5! I'm definitely gonna take your advice and head to a certified dealer. Just curious, do you remember roughly how much they quoted you initially for the repair? And has everything been working smoothly since they fixed it, or have you noticed any other quirks? Cheers!

Hey there! Just wanted to follow up, yep, everything's been working perfectly since I got it fixed! My cruise control has been functioning flawlessly, and I haven't had a single problem with any of the driver assistance systems. The repair bill came to 95 €, it turned out to be a faulty cable connection that needed sorting out. Pretty straightforward fix, really. The mechanic showed me the corroded connector they replaced, and it was obvious why it was causing problems. Honestly, going to the certified dealer was the right call. They knew exactly what they were looking for and fixed it right the first time. These high-tech EVs need specialists who understand all the fancy electronic bits and pieces. Good luck with your repair! Let us know how it turns out.

Thanks for the update! Just wanted to share that I took your advice and got it sorted at the certified dealer. You were spot on about the connector issue! Funny enough, the problem was even simpler than I expected. Turned out there was some dirt buildup in the sensor connection, they cleaned it up, ran some diagnostics, and everything's working perfectly now. The whole thing only cost me around 75 bucks since it was mostly labor. The mechanic was super helpful and showed me exactly what was causing the problem. He even gave me some tips on preventive maintenance to avoid similar issues in the future. Much better experience than my last mechanic! Really appreciate your help pointing me in the right direction. The cruise control's working like a charm now, and all those annoying dashboard warnings are gone. What a relief! Thanks again for the solid advice!