[335isGuy]

Well I have the base system in my car.. well as you know it sucks! I looked at BSW and wow on the prices. Can I just replace my mids, tweeters, add sub and replace amps? I have NAV/I-Drive?

Or do I need to do something before I can do that?

[kaigoss69]

Plenty of posts out there to answer your own questions. Or, just wait until Ctuna inundates you with links.

[ctuna]

You have to know which 2011 system you are starting with the one without tweeters and amp or the older modified hi fi.

http://www.e90post.com/forums/showthread.php?t=365866

http://www.e90post.com/forums/showthread.php?t=352586

http://www.e90post.com/forums/attach...2&d=1266451970

http://www.e90post.com/forums/showthread.php?t=508584

[335isGuy]

Originally Posted by ctuna

You have to know which 2011 system you are starting with the one without tweeters and amp or the older modified hi fi.

http://www.e90post.com/forums/showthread.php?t=365866

http://www.e90post.com/forums/showthread.php?t=352586

http://www.e90post.com/forums/attach...2&d=1266451970

http://www.e90post.com/forums/showthread.php?t=508584

I have tweeters? Also by doing any upgrades, mids, highs, amp, sub, etc.. will there be any issues with the I-Drive?

[ctuna]

I would check your trunk for the amp and take a look at the
cable going in . If it looks like the cable in the above links you should
be OK.
Technic makes a harness that allows you to connect to the hi fi amp connector
without cutting any wires . I would try to get in contact with him or VP Electricity .
Contact VP Electricity for a complete kit or search for Technics system suggestions
in this forum.
Its not cheap to modify this system because of speaker depth and size . Technic has the
best suggestions for low cost systems.

http://www.e90post.com/forums/showthread.php?t=368847