Do I need an antenna adapter...?

[Hartge330Ci]

To put an alpine deck in a 95 525i E34?

[theDogger]

Yes you do.....

http://akamaipix.crutchfield.com/products/2002/097/l097DIN2-f.jpeg

hope that this helps...What model Alpine deck are you installing??

theDogger

[Mobius20]

Yes you do.....

http://akamaipix.crutchfield.com/products/2002/097/l097DIN2-f.jpeg Oh you're shitting me. The only adaptor I could find was some 12" long pigtail that was a fucking bitch to cram behind my already-too-deep deck.

Anyhow, keep in mind that your antenna is a diversity system which uses your defroster grid. There's an antenna tuner/amp box that needs power from the deck to get you any sort of radio reception. So, don't forget to connect the 'remote turn on' lead on the aftermarket pigtail to the 'amp turn on' or 'power antenna' lead off your new deck.

The other smaller cable that runs with the antenna cable was used by the original deck to feed the tuner/amp info on the strength of the signal it was getting, so the tuner/amp could tune in a better signal. It does a decent enough job of getting reception without this, though. Don't worry.