BMW X4 Diesel Jerking and Stalling: Need Expert Help!

As a BMW X6 2019 diesel owner, I can relate to your situation. Had nearly identical symptoms last winter. It turned out to be a cracked intake manifold, which was causing a significant vacuum leak and allowing excess fuel into the system. The main giveaway was the strong diesel smell and rough running, exactly what you're describing. In my case, the scorching on the manifold created small cracks that got worse over time. The repair involved replacing the entire intake manifold assembly along with several gaskets and sensors that were damaged from the heat. This isn't a quick fix but it's definitely serious enough to need immediate attention. Continuing to drive with these symptoms could lead to more extensive engine damage. While I can't recommend specific mechanics, I'd suggest finding one who specializes in BMW diesels, as they'll be familiar with these common issues. My repair experience took about two days at the shop, but it completely resolved the performance issues. The car's been running smoothly since then with no reoccurrence of symptoms.

Thanks for sharing your experience with the X6! Really helpful to hear about a similar case. Just wondering, do you remember roughly how much the whole repair set you back? Also, has everything been running smoothly since the fix, or have you noticed any other little quirks pop up? My X4's been driving me crazy with these issues, so it'd be good to know what to expect cost-wise and if I should watch out for anything else down the line.

Hey there! Glad I could help with my X6 experience. Actually, I just got everything sorted last week, the intake manifold was definitely the culprit, just like I suspected. Ended up costing me 1180 € for the whole repair job, including all the parts and labor. The scorching had really done a number on the manifold, but since getting it fixed, my car's running like a dream! I've put about 500 km on it since the repair, and honestly, it feels like a completely different car, in a good way! No more jerking, no more weird diesel smell, and the engine's purring like it should. Haven't noticed any other issues popping up either. The acceleration is smooth again, and that annoying limp mode is history. Trust me, while the repair bill might make your wallet a bit lighter, it's totally worth getting it sorted properly. These diesel engines are solid once you fix what's bothering them. Just make sure whoever works on it knows their way around BMW diesels, it makes a huge difference!

Thanks for all that detail, really helps put my mind at ease about getting this sorted! I bit the bullet and took my X4 to a new mechanic yesterday. You were spot on about the intake manifold, that's exactly what they found. They're working on it now. Got lucky and found this mechanic through a, what a difference from my last experience! This guy actually took the time to show me the damaged parts and explain everything. He's estimating it'll cost a bit more than what you paid, around 1400 €, but at least I know what I'm paying for this time. Fingers crossed my car runs as smoothly as yours after the fix! The whole situation's been stressing me out, but hearing your success story makes me feel better about spending the money to get it done right. Thanks again for sharing your experience, it really helped me make the decision to get it sorted properly!

Change the intake manifold or have it cleaned. Also check the seal of the engine block for oil leaks.

(Translated from German)

After addressing the intake manifold, it's a good idea to inspect the engine block for any oil leaks, as these can lead to further issues if not resolved. Keep an eye on your car's performance after the repair and let us know if you notice any other symptoms. If you have any more questions or need further assistance, feel free to ask!