[ctuna]

Try searching for Base system upgrades.
Just put the word base in the search box
it's probably one of the most asked question here
and there have been lots of responses.

There are many threads already that go into detail on this
with lots of examples.


ase System Upgrades
http://www.e90post.com/forums/showthread.php?t=1378833
http://www.e90post.com/forums/showthread.php?t=1378833
base system wiring pre/post 3/09
https://www.google.com/url?sa=t&rct=...tDpLJPcGkw_ui_
http://www.e90post.com/forums/attach...1&d=1411521234
http://www.e90post.com/forums/showth...ghlight=Dotech
http://www.e90post.com/forums/attach...1&d=1411521234
http://www.bimmerfest.com/forums/sho...d.php?t=550771
http://www.e90post.com/forums/showthread.php?t=445266
http://www.e90post.com/forums/showthread.php?t=581379
http://www.1addicts.com/forums/showthread.php?t=634957
http://www.e90post.com/forums/showthread.php?t=494299
http://www.e90post.com/forums/showthread.php?t=451941
http://www.e90post.com/forums/showthread.php?t=495855
http://www.e90post.com/forums/showth...ht=amp+upgrade
http://www.e90post.com/forums/showthread.php?t=540954
http://f30.bimmerpost.com/forums/sho....php?t=1003810
http://www.e90post.com/forums/showth...1#post16679904
http://www.e90post.com/forums/showthread.php?t=822366
http://www.diymobileaudio.com/forum/...morel-jbl.html
http://www.e90post.com/forums/showth...ghlight=Dotech
http://www.e90post.com/forums/showthread.php?t=445266
http://www.e90post.com/forums/showthread.php?t=581379
http://www.e90post.com/forums/showthread.php?t=495855
http://www.bimmerfest.com/forums/sho...d.php?t=550771
http://www.e90post.com/forums/showth...ht=amp+upgrade
http://f30.bimmerpost.com/forums/sho....php?t=1003810
http://www.e90post.com/forums/showthread.php?t=451941
http://www.e90post.com/forums/showthread.php?t=540954
http://www.diymobileaudio.com/forum/...morel-jbl.html
http://www.e90post.com/forums/showth...1#post16679904
http://www.e90post.com/forums/attach...1&d=1411521234
http://www.e90post.com/forums/showth...1#post16679904
http://www.1addicts.com/forums/showthread.php?t=634957
http://www.e90post.com/forums/showthread.php?t=494299
http://www.e90post.com/forums/showthread.php?t=822366