 where do i begin? its a POS. in the 3 years i owned i cant say its a high performance vehicle because i have ALWAYS driven it with an existing problem. usually two problems at once. started with the tires that came on vehicle, factory recommended run flats that were causing vibration, did alignment, issue continued. replaced tires, issue went away partially because the boots needed to be replaced. water pump failed, flat bed truck towed, $$ thousands later, intermittent power reduction while driving, replaced two spark plugs and two coil overs, valve decarb recommended,  replaced two spark plugs and two coil overs, no you're not seeing double, nor triple because power reduction again, and rpms all over the place, replaced both bank 1 & 2 turbos, $5k to find out it was the clutch (its a 6 speed manual) not the turbos, dealer could care less. i've never seen a car leak oil like this, its ridiculous, they replaced the oil housing 3 times, pretty much every oil change you replaced some major part. another power reduction issue caused by broken gasket, replaced that one too. this car promises 300hp, it never delivered because it always had an issue. the boot of the car contains all the electronics, a water bottle i had in trunk leaked and again power reduction, vehicle undriveable, $1100 to fix tpms sensor, like what does that have to do with engine power. and they had to reset the whole car. battery replacement $500+ has to be programmed. i swear they didnt make any of this up the dealer, but they might as well have. read around all 2005-2010 bmws have major issues like this. the list goes on, but i am at a loss for words.