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One thing that really stands out to me is that Burger Motorsports and Sprint Booster have produced products that can totally eliminate the lag. Granted, they cost about $300, but if they can produce a product that eliminates it altogether, then there is no reason BMW cannot program it to eliminate it as well.
I have not researched these products in great depth, but from what I have read thus far, owners who use them have reported no more lag and that their car is fun to drive again. The question for me is do they effect the gas mileage. According to Terry at BMS and Ken at SB, as long as you do not change your driving habits, there is no effect on the gas mileage. If this is indeed the case, then BMW's claim that the lag is to help with fuel efficiency is in question... and maybe that is a scapegoat for a more serious issue that will cost them dearly if they were to admit it is a problem and have to recall hundreds of thousands of cars. Then again, they seem to have already admitted it being a problem in the 535i and issued a software update for it. I do not understand how they can admit it is a problem in the 535i, but state it is normal for a 528i. Two different 535i owners also stated their gas mileage improved after the software update. Go figure! Hey... I will take a software update and improved gas mileage if a software update will eliminate the lag.... who wouldn't?
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