[geminiys]

Can you please provide more details on your car?
Miles, Last Service performed, and what was replaced. Does the behavior you are describing happens when you are at standstill? Does it happen when AC most likely kicks in or you doing something? Do you have an Audio Amp in the trunk causing extra power consumption?
It is possible that computer is trying to regulate Air/Fuel mixture due to increase of load that it detects. In effect RPM needle to fluctuate. It cold also be due to old Spark Plugs but you will get shacking and potentially misfire. The MAF Sensor could be dirty, as well as Air Filter (restricting air flow). Your O2 Sensor could be acting up but not trowing CEL as of yet. Your HPFP could also be acting up. I thought there was a recall on those for your year model. Have you had it replaced?

Originally Posted by sophistograu528i

Greetings ladies and gents,

First post, not new to the F10 528i and far from new to BMW's, current 27 year owner of the same '80 633 CSi and more recently, an E46 330 Ci Cabrio.

Anyhoo, back to the matter at hand, the missus 2011 528i (note: only year with 3.0L inline 6, not turbo 4) that is starting to experience something weird and a bit startling as well, unintended acceleration.

Well, to be more specific, it feels like a very brief lurching while foot on the brake, so the car really doesn't move anywhere, and it's very momentary, but odd and scary nonetheless.

if anyone has experienced this phenomenon and better yet, knows what causes it and what the solution is, I would greatly appreciate hearing back, before traipsing off to the "stealer" only to pay a few C-notes, just for troubleshooting.

Many thanks in advance!!

Cheers, Bobbo