To OP: Great install! I was trying to talk my friend (He has an e39 530i) to get an install done like this and he was like, "Nah, man. It'll make my ecu go haywire!" His logic was so flawed I didn't even bother.
But I love these cars. I've wanted one for a while. So smooth to drive.
Those are all real clean installs. bimmer looks clean as hell too man. On the 1st set up with the 8's it would have been neat if you could find some similar to factory leather or vinyl and wrap that front panel but the carpet didn't look too bad.
I was going to do that but Im soon to rip it all out and replace everything with more space saving equipment. PDX amps and hopefully a 8w7 facing out the ski pass and a round port up through the rear deck. A false wall in the trunk. And my Alpine SPX-f17t comps in the doors. So all this ish will be in the classifieds soon. //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif
I'd suggest drilling holes into the amp rack/board, use grommet, then run the wire under the board.
like so: