BMW X1 Boost Sensor Drama: Stalling and Power Loss Signs

Had similar issues with my 2020 BMW X3 20d last month. The symptoms you describe match exactly what I experienced, engine light, jerking, whistling sounds, and poor performance. After inspection, turned out the boost pressure sensor's wiring harness was damaged, causing intermittent connection issues. The connector had corroded and wasn't making proper contact. It was more of a wiring issue than a sensor problem. The fix involved replacing the entire wiring harness and connector for the boost sensor. Not a major repair job, took about 2 hours at the dealership. Wasn't a serious problem, but definitely needed immediate attention to prevent potential engine damage. Since the repair, car runs perfectly, normal power delivery, no more warning lights or strange noises. Your symptoms strongly point to the same issue. Would recommend getting it checked soon, as driving with faulty boost control can affect engine performance.

Thanks for sharing your experience! That sounds exactly like what I'm dealing with right now. Happy to hear you got it sorted out. Do you remember roughly how much the repair set you back? Also, has everything been running smoothly since the fix, or have you noticed any other quirks?

Hey again! Glad I could help. Just wanted to update you, yes, everything's been running perfectly smooth since I got it fixed last month. The mechanic confirmed it was indeed the boost pressure sensor acting up due to a bad cable connection. Only cost me 95 € to fix, which was a relief as I was worried it might be something more serious! No other quirks or issues since the repair, the car's performing like new again. The jerking, whistling noises, and power issues all disappeared completely. Fuel consumption is back to normal too. Pretty happy with how it turned out, especially considering how worried I was initially. My advice would be to get yours checked out soon, it's a relatively simple fix but definitely not something you want to leave unattended. Seems like a common enough issue with these models, but thankfully not an expensive one to sort out. Let me know how you get on with yours!

Just wanted to update, got my X1 checked out today based on your advice, and you were spot on! Turned out to be the exact same issue with the wiring harness. The mechanic I found was really thorough and showed me the corroded connector. The repair ended up being pretty quick and affordable, much better than I'd feared. Took the car for a test drive afterward, and what a difference! No more jerking or weird noises, and the engine's running smoothly again. Such a relief it wasn't anything major. Really appreciate you sharing your experience, helped me feel more confident about what needed to be done. Amazing how such a small wiring issue can cause so many problems! At least now I know what to watch out for in the future. Thanks again for your help!