Why would it need reloading unless something had overwritten it? The 1M, 335is and Z4 sDrive35is all have a performance tuned version of the N54, this is just BMW doing the same with the N55. It could be a different engine variant like the 6 series uses, but we won't know until someone takes delivery.
Originally Posted by palmster
if the extra 40hp only comes from a software flash, how reliable will the upgrade even be? I would guess that a year or two down the road this software flash will need reloading as the car ages and loses power? This whole ZMX package is for suckers and I admit I was taken.
09 135i 6MT, ZMP, PPK1
13 X5 35i ZMP, ZMX, 2VA
13 Tiguan SEL 4motion