Originally Posted by WCH
Unfortunately the parts won't fit an E92. There is a box under the seat than gets in the way of the mounting bracket. The actual box would fit but if your seat is in the lowest position, it is a tight fit.
I haven't decided whether to put it into the wife's E93 but certainly others should not order it for an E92.
So I ordered this same kit from ECS Tuning:
The bracket will not natively fit the e90 sedan. There are 2 changes that need to be made for the bracket in order to fit under the passenger's seat.
1. You need to relocate the control module for the heated seats. The easiest way to do this is to cut the screws (they are top mounted) and move the module to the back and screw it in (bottom mounted).
2. The bracket needs to be shaved down to properly fit. Even with it attached, the seat can not go 100% of the way down--probably about 97%. If you have a 6'8" passenger, this might be an issue. For everyone else, it's perfect...
Will post some more pictures when I dig them off the camera.