This kit is for the installation in the trunk only. If you want to install behind the stereo and your BMW does not have Navigation - please order BMW adapter with dash mounting cable.
If your stereo has (digital sound processing, usually written on the front of your stereo) you will also need GROM DSP Adapter Kit.
THE MOST DEFINITE WAY TO DETERMINE IF YOUR CAR HAS THE DSP AMPLIFIER, IS TO PHYSICALLY LOCATE THE AMPLIFIER AND LOOK TO SEE IF THERE IS A MINI-COAXIAL CABLE PLUGGED INTO THE AMPLIFIER.
IF YOU DON'T HAVE A MINI-COAXIAL CABLE PLUGGED IT, YOU DON'T HAVE A DSP AMPLIFIER, AND YOU DON'T NEED TO PURCHASE THE DSP ADAPTER.
IF YOU DO HAVE THE DSP AMPLIFIER, YOU WILL NEED TO ALSO PURCHASE THE DSP ADAPTER KIT, BECAUSE YOU WILL GET NO SOUND.
Direct sound connection will ensure the best sound quality.
AUX 3.5mm car audio input: Just plug the device into the extension port of your stereo, connect it to your favourite MP3 player, iPod, iPhone, or Android device and hear the CD quality music right away!