Please help! I have a 2016 Alpina B6 with about 57,000 miles on it. Occasionally the car subtly bucks under the following situations: while coming to a stop at a light for the final second of travel; while backing up slowly like with parallel parking; at calm highway speeds (70-75 mph) and stepping on the gas a bit to accommodate for going up a gentle gradient. At first I thought it way just uneven wear of brake pads or rotors since it is most noticeable when coming to a stop. But it definitely happens when no brakes are applied. The bucking is not violent but usually lasts for 3-5 beats and is very noticeable to passengers. Everyone who has even been in my car has said at least once "what was that!" Some online forums have suggested that, with such a huge appetite for gas, at some point the car must have run near dry and damaged the fuel pump. There are no error codes. BMW techs have driven the car without recreating the bucking, though it happens very, very often. Does anyone have any thoughts? Thank you.