BMW X7 Stalling Mystery: Fuel Pump or Something Else?

I had nearly identical issues with my 2020 BMW X5 last year. The symptoms matched yours exactly, rough idle, stalling, increased fuel consumption, and that dreaded check engine light. Initially thought it was the fuel pump too, but when I took it to the garage, it turned out to be faulty wiring connections to the fuel injection system. Some connectors had corroded and weren't making proper contact. Not a super serious issue, but definitely something that needed immediate attention to prevent potential engine damage. The repair involved replacing several corroded connectors and rewiring a small section. The car's been running perfectly since then, no stalling, normal fuel consumption, and smooth idle. You're right to be careful about choosing where to take it. I'd recommend getting it diagnosed with a proper BMW diagnostic tool first. These symptoms could also point to other issues like injectors or sensors, so a proper diagnosis is crucial.

Thanks for sharing your experience! That's super helpful as I'm dealing with the exact same symptoms. Really good to know it wasn't as serious as it could've been. Mind if I ask how much you ended up paying for the wiring repair? Also, has everything been running smoothly since then, or have you noticed any other quirks pop up?

Hey again! Yes, absolutely, I can update you on everything. After seeing my mechanic, it turned out my initial hunch about the fuel pump wasn't too far off. The actual problem was just a faulty connection to the pump, not the entire unit itself. The repair was pretty straightforward, just 95 € to fix the cable and plug connection. Way better than having to replace the whole fuel pump! The best part? My X5 has been running like a dream since the fix. No more stalling, no rough idling, and my fuel consumption is back to normal. Haven't had a single problem in the months since the repair. It's such a relief when these things turn out to be simpler (and cheaper!) than expected. Honestly, the most annoying part was just the stress of not knowing what was wrong initially. But once they found that loose connection, it was a pretty quick fix. If your symptoms are matching what I experienced, hopefully you'll have similarly good luck with the repair! Let me know if you want any other details about the repair process or how the car's been performing since then. Happy to share more about my experience!

Just wanted to update everyone after getting my X7 checked out. You guys were super helpful! I finally got the courage to try a new mechanic, and I'm so glad I did. Had an interesting experience at the shop today. Turned out it wasn't the fuel pump at all, found out I had a clogged fuel filter and some dirty injectors. The mechanic was really thorough and showed me exactly what was wrong. Total bill came to about €380, which included cleaning the injectors and replacing the filter. Got it back a few hours ago and what a difference! The engine starts right up, idles perfectly, and feels so much smoother. Pretty relieved it wasn't anything major. Really appreciate everyone who chimed in with advice, definitely helped me feel more confident about getting it checked out. Now I've finally found a mechanic I can trust, which is honestly worth more than the repair cost itself. Thanks again for all the help!