BMW X4 Fuel Gauge & Stalling: Multiple System Failures

Hey there! I had almost identical issues with my 2012 BMW X3 last year. The symptoms you're describing match what I experienced, stuck fuel gauge, CEL, and stalling. Initially thought it was just the fuel sensor, but it turned out the main fuse for the fuel pump circuit was failing intermittently. In my case, the mechanic found corroded contacts in the fuse box, which affected the fuel pump operation. The fix involved replacing the fuse, cleaning the fuse box contacts, and updating the fuel pump control module. It wasn't a major repair in terms of complexity, but it needed proper diagnostic equipment to pinpoint the exact issue. The stalling was happening because the fuel pump wasn't getting consistent power. Once fixed, all symptoms disappeared, gauge started working normally, CEL cleared, and no more stalling issues. If you're dealing with a BMW, make sure whoever works on it has experience with these models. The diagnostic systems are pretty specific to BMW, and getting it wrong can lead to unnecessary parts replacement.

Hey, thanks for sharing your experience with the fuel system issues! It's good to know I'm not the only one who's dealt with this. The fuse box problem seems like it could definitely be what's causing my troubles too. Just wondering, do you remember roughly how much you ended up paying for the whole repair? Also, has everything been running smoothly since then, or have you noticed any other quirks pop up? Still a bit nervous about picking the right shop for this, but your story gives me some hope that it might not be as bad as I feared.

Hey again! Happy to update you! Yeah, I got that sorted at the mechanic, the fuel level sensor issue is completely fixed now. Turned out it was exactly what I suspected, a faulty fuse was causing all that trouble. The repair was pretty reasonable, only cost me 52€ to replace the defective fuse and clean up those contacts. Since the fix, my BMW's been running like a charm! The fuel gauge works perfectly now, no more check engine light, and that annoying stalling problem is history. It's such a relief not having to guess how much fuel I've got left anymore. Honestly, it was way less painful than I expected, both for my car and my wallet. From what you're describing, sounds like you might be dealing with the same thing. Just make sure you find someone who really knows BMWs, it makes all the difference. The diagnostic equipment they use is pretty specific to these cars, so you want someone who knows what they're looking at. Let me know how it goes when you get it checked out! Always good to hear how these things turn out.

Thanks so much for following up! Just got back from the mechanic myself and wow, what a relief! My experience was super similar to yours. They found the same issue with the fuse and some dirty contacts. Cost me a bit more than yours, around 85€ total because they had to do a full diagnostic scan first. Got it all fixed yesterday and took it for a good test drive today. The fuel gauge is finally working properly, that annoying check engine light is gone, and no more stalling! Can't tell you how nice it is to actually know how much gas I have left without having to guess. Really glad I asked here first, saved me from potentially getting overcharged or having unnecessary parts replaced. The mechanic I found was great, actually took the time to show me what was wrong and explained everything. Definitely keeping them for future repairs. Thanks again for all your help! It's such a weight off my shoulders having this sorted without breaking the bank.