BMW 2 Series Engine Troubles: Jerking and Limp Mode Alert

I had very similar symptoms with my 2016 BMW 3 Series last winter. After checking with my trusted mechanic, it turned out to be a cracked exhaust manifold causing an exhaust leak. The symptoms matched yours perfectly, rough running, jerking during acceleration, limp mode, and failing emissions. Got it fixed at an independent BMW specialist. They had to replace the exhaust manifold and some gaskets. The repair was quite involved as they had to remove several components to access the manifold. It wasn't a quick fix, took them about two days to complete the job properly. This kind of issue needs immediate attention as it affects engine performance and can cause more damage if left unchecked. The exhaust leak was allowing unmetered air into the system, confusing the engine management and triggering the check engine light. Would definitely recommend finding a reputable BMW specialist rather than a general mechanic. They'll have the right diagnostic tools and experience with these specific issues.

Thanks for sharing your experience, sounds exactly like what I'm dealing with! This is really helpful, especially knowing it was the exhaust manifold in your case. Do you remember roughly how much you ended up paying for the whole repair? Also, has everything been running smoothly since the fix, or have you noticed any other issues pop up?

Hey there! Happy to give you an update on my 3 Series. The total repair came to 265 € for fixing the exhaust leak, which honestly wasn't as bad as I initially feared. And I've got great news, since getting it fixed, the car's been running perfectly smooth. That uneven engine running completely disappeared, and there's no more jerking during acceleration. It's like having a completely different car! I'm really glad I went ahead with the repair when I did. The specialist I mentioned earlier did a thorough job, and it's been absolutely worth every penny. No check engine lights, no limp mode, nothing, just smooth sailing for the past months. I can definitely breathe easier now knowing it was sorted properly. If you're experiencing the same symptoms, I'd really recommend getting it checked out sooner rather than later. The peace of mind alone is worth it, and you'll likely prevent any additional problems from developing.

Thanks so much for that detailed follow-up. I actually just got back from taking my car to a BMW specialist you inspired me to visit. Turns out it was indeed the exhaust manifold, just like in your case! The mechanic found multiple cracks that were causing all those issues. The repair cost me a bit more, around 350 €, since they had to replace some additional gaskets that were pretty worn out. But honestly, I'm just relieved to have it fixed properly. Took my car for a test drive yesterday and what a difference! No more jerking, no check engine light, and it's running as smooth as butter. The mechanic was really thorough and even showed me the damaged parts. Can't believe I waited so long to get it checked out! They also did a full diagnostic scan and everything else looks good. Should be passing that emissions test with flying colors now. Really appreciate you sharing your experience, it helped me make the right decision instead of putting it off longer. Now I can finally enjoy driving my BMW again without worrying about every little noise or problem!