Originally Posted by MrTandel
I've had a similar knocking noise. I scanned my car and codes 2E35 and 29D2 popped up and it ended up being my fuel injector. I went ahead and replaced it and it runs like a champ with no knocking at all =)
I have an n54 and had ticking noise. I brought it to bmw and they said I should get fuel injector service done to my car. So basically they told me my injectors are going bad but they can't so anything about it
With that said; fuel injectors is a big possibility.