BMW XM Stalling & Jerking Issues, Owner Seeks Solutions

Hey there! I can relate to your situation. I had similar symptoms with my 2020 BMW X6 M last month, rough idle, jerking during acceleration, and that dreaded check engine light. When I took it to the garage, it turned out the problem wasn't the fuel pressure sensor but actually a faulty cable connection to the crankshaft position sensor. The main wiring harness had some wear and tear, causing intermittent signal issues. They had to replace the entire wiring connection and recalibrate the sensor. It wasn't a hugely complex repair, but it definitely needed professional attention to get it sorted properly. From what you're describing with your XM, it sounds very similar to what I experienced. It's worth getting it checked soon because these symptoms can lead to bigger problems if left unchecked. I'd suggest finding a certified BMW specialist rather than a general mechanic, they'll be more familiar with the specific electronics and wiring layouts of these models. The repair fixed all my issues, and the car's been running smoothly since then. Make sure they do a proper diagnostic scan first before replacing any parts.

Thanks so much for sharing your experience! That's really helpful information about the crankshaft position sensor. I'm glad you got it sorted out. Just curious, do you remember roughly how much you ended up paying for the repair? Also, has everything stayed running smoothly since then, or have you noticed any other little quirks popping up? Been thinking about taking mine to a certified BMW specialist like you suggested, just want to have an idea of what I might be in for cost-wise.

Hey again! Happy to give you an update on my situation. After I mentioned my issues in my first reply, I actually took my X6 M back to the shop because the symptoms came back briefly. Turns out I was wrong about the crankshaft sensor, it was indeed the fuel pressure sensor that was acting up, just like you initially suspected with yours! The final bill came to 95 € for fixing a dodgy cable connection. Pretty reasonable considering I was worried it might be something more serious. Since they fixed that, my car's been running like a dream, no more rough idle, no jerking, and most importantly, no more check engine light! I know it can be nerve-wracking dealing with these issues, especially after a bad experience with a mechanic, but getting it properly diagnosed and fixed was totally worth it. My car feels like new again, and I haven't had a single quirk pop up since the repair. Been about three weeks now of smooth sailing. Definitely stick with your plan to see a certified BMW specialist. They might charge a bit more for diagnostics, but they'll get it right the first time, which saves money in the long run.

Thanks for the follow-up! That's interesting that your final diagnosis matched my initial suspicion about the fuel pressure sensor. I actually ended up taking my XM to a certified BMW specialist yesterday. The experience was totally different from my previous mechanic, they were professional, thorough, and actually explained everything they were doing. The diagnostic test revealed it was indeed the fuel pressure sensor causing all the trouble. They replaced it and fixed some wiring issues too. Cost me about 120 for parts and labor, which honestly wasn't as bad as I was expecting. The car's running beautifully now, no more rough idle or jerking during acceleration, and that annoying check engine light is finally off! Funny how sometimes our gut feelings about car problems turn out to be right. Really glad I asked for advice here and followed your suggestion about going to a specialist. Definitely worth every penny to have it done properly. Think I've found my new regular mechanic too!