I have hear of costs to replace the TCU as low as $1500 US (parts at cost from the dealer) to as much as $2500 US. It depends if the dealership is prepared to help you out.
Originally Posted by Me530
US$ or CAN$ ? (not that it matters a whole lot, its a fair amount of money any way you slice it!)
There have also been instances where the TCU was fried during software updating and replaced under warranty by BMW.
2014 F31 Estoril Blue, MSport Line, M Performance, Premium, Executive, and Rear Comfort packages
2011 E90 328 xdrive - Space Grey on Saddle, Executive Package, Premium Package
22 Retired and thoroughly enjoyed Bimmers