I just replaced the blower motor in my E90 today. Took me 10 mins total and I don't know why everyone is making a big deal saying it's a PITA.
I followed the instructions and pulled down but did not remove the plastic duct that was in front. Was able to get the blower in and got it to lock without any effort.
My old blower had a different p/n on it and there was 3 leafs in there. It made a squealing noise one time and latey it makes a loud buzzing noise at max speed so it was time.
2007 Montego Blue 328xi
Sedan | Poplar trim | Steptronic | Cold Package | Power front seats w/memory | Xenon Adaptive Headlights | PDC | 2008 Plate LED's | PBX | LUX v5.2