BMW 1 Series Fuel System Issues, Stalling and Power Loss

Hey there! I've got some experience with cars and had a really similar issue with my 2006 BMW 3 series last year. The symptoms you're describing sound exactly like what I went through, that unstable idle and sluggish response were so frustrating! Turned out it was indeed the fuel rail pressure sensor that was acting up. My mechanic diagnosed it, and after replacing the sensor (cost me around 240 Euro), the car ran perfectly again. The whole repair took about two hours. Can you tell me if you've had any other warning lights besides the check engine light? Also, have you noticed any difference in fuel consumption lately? Knowing these details would help confirm if we're dealing with the same issue. You're on the right track with the pressure sensor suspicion, these symptoms are pretty typical for that problem in BMWs. But just to be safe, it's best to get a proper diagnostic done first.

Yep, having almost the same symptoms with my car too. Just did my service last week and everything was fine then. Mine's at 29829 KM, and these issues just started popping up recently. Had my mechanic run a diagnostic and he's also leaning towards the fuel rail pressure sensor being the culprit. Haven't noticed any other warning lights besides the check engine one, but fuel consumption seems a bit higher than usual. Thanks for sharing your experience, really helps to know the repair isn't too complex or time-consuming. Think I'll go ahead and get it checked out properly this week.

Hey again! Yeah, after reading about your mileage and recent service, I'm even more convinced it's the same issue I had with my BMW 3 series. Actually, mine started acting up right after hitting 30K too, pretty similar timing to yours. Just to add to my previous reply, after I got mine fixed, I noticed the fuel consumption went back to normal within the first tank. It's funny you mention the higher fuel consumption because that was definitely something I experienced too but didn't connect the dots until after the repair. Quick tip from my experience, when they replace the sensor, make sure they check the wiring harness too. In my case, there was a bit of corrosion on the connector that they cleaned up while they were in there. Didn't cost extra but probably helped prevent future issues. Honestly, once it was fixed, it was like driving a completely different car, all that stuttering and power loss just disappeared. Let us know how it goes after you get it sorted! Always good to hear if others are having similar fixes with these BMWs.

Thanks so much for the additional info, especially that tip about the wiring harness! I'll definitely mention that to my mechanic when I take it in. It's really reassuring to hear that your car went back to normal after the fix, and that the fuel consumption improved too. That's exactly what I'm hoping for. I've actually just booked it in for tomorrow morning, couldn't wait any longer with these issues. The shop said they should be able to get it done within the day, which is great. Really appreciate you sharing your experience, it's made me feel much more confident about what needs to be done. I was worried it might be something more serious (and expensive!), but this seems pretty straightforward. I'll probably update the thread once it's all sorted, just in case anyone else runs into the same problem with their BMW in the future!