Originally Posted by 666devil
I dont have memory seats, and folding mirrors. I will start seatching for mirror, I have to buy only one side(pasesnger)?
i would suggest you remove your mirrors to take a look at it first before buying the new mirrors. check to see if there's 3 or 5 pins on it. if there's only 3 pins then you may not need to buy new mirrors at all if your controller supports the feature. remove the mirror cover and check the part number of the controller on realoem.com. if the part number says it's for LIN bus then you do not need new mirrors.
you'll need to buy a pair of mirrors. E90 pre LCI mirrors are quite common on ebay.uk if you have a RHD car. since you're replacing your mirrors, might as well buy a set of folding mirrors.
for the steps on coding and hardware install, there is a DIY guide on bmw coding dot com forum for E88 power folding mirror retrofit. since E8x and E9x are similiar, you should be able to use that guide as well.