Originally Posted by Dark5yde

I did a search and came up empty on most my questions so here we go....all questions pertaining to a 2003 x5 3.0i

1. I read that pushing the arrow button on the keyfob opens all the windows and sunroof. This does not work on mine. If I put the key in the door and hold it to the left it does however. Did this not work on all models?
You have to hold the button for a few seconds, just like holding the key in the lock. Should work on all models

3. If my model did not come with a subwoofer box in the rear are the connectors still present and can I tap into them?
Only those with DSP sond system has subwoofer in the rear. In your case, no connectors. You need an amp to drive the subwoofer.

I have more but I dont want to clutter. Any help is appreciated. Thank you