[AnthonyT]

What system do you have? Have you experienced any issues with having them installed?

I have a Kenwood touch screen, and have had a bunch of problems when any recall needs to be performed or anything done with the computer. Even though the dealership itself were the installers.

[ctuna]

http://www.e90post.com/forums/forumdisplay.php?f=27

It well known that the BMW diag computer at the dealership
will not work without the car in the orginal configuration which includes
whatever Radio or Idrive configuration you have/had .
There are ways to do coding and updates without this with a coding setup but BMW won't do it. (they don't support coding setups)
The guys on the coding sub board have a way around some of this.
The common way around this is to mount the original radio in the trunk.(see second link)
Also if you have any options like SOS , PDC ,CDC they will cease to work
as the radio acts as a server and a switch for them.

head unit
http://www.e90post.com/forums/showth...ight=head+unit
http://www.e90post.com/forums/showth...hlight=dynavin
http://www.janus-design.net/english/
http://www.e90post.com/forums/showth...ight=head+unit
http://www.e90post.com/forums/showth...hlight=dynavin
http://www.e90post.com/forums/showth...hlight=dynavin
http://www.e90post.com/forums/showth...light=retrofit
http://www.e90post.com/forums/showth...hlight=dynavin

Basicly if you had a pro radio you need to mount it in the trunk and hook it up or put it back in for the update or repair.
See the second link.

You got a Dealership to install a aftermarket Radio which dealership?
Can hardly believe anyone of them would have the guts to do that.

[AnthonyT]

The Dealership in Fresno. Every time I need coding done or anything they've just bypassed the radio. Not exactly sure how. But thanks for the info!