This Alpina TCU flash works for model years 3/07 till present N54/N55 engine (some N55 engines which are rare, exhibit the rpms jumping down to zero on each shift but acts normal in every other way.This can be addressed if you update your DME version if you have this erratic rpm issue after flash). It is indeed a must have flash if you own a E9x with a N54 engine. You will no longer feel the lurching when the tranny shifts and it goes through the gears without even the slightest hesitation. This single flash will make the car change gears more refined and crisp. You will have a new indicator for gear selection in D mode which display D1, D2, D3 ,D4, D5 and in DS mode you will see S1, S2, S3, S4, S5 and the same for the M mode. This flash will make the transmission run smoother, gear change will be more precise and crisp, rev match downshift is unbelievable, rev limiter is increased and overall driveability is increased. Proceed after reading this warning if you choose to do so. If your not too confident in doing this, either pay someone or just do without it.WinKFP is a very dangerous tool but yet its awesome and in terms of coding its pretty advanced. WARNING.If you dont know what your doing, dont be brave and blindly go into this advanced flashing of software into the TCU module. I do not hold any responsibility if you damage your car.
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This guide just provides the instructions on how to flash the software.
This guide is intended for personal use and anything that happens to your car is done soley by your choice. I have posted this on other forums and finally had the chance to broadcast this on