2004 BMW 5 Series Auxillary Upgrade
As with many cars these days, it isn’t always that easy to add an auxillary option to a standard stereo. The simplest way to do this is to add a Pro FM Modulator kit which wires in via the aerial socket of the radio and has a little switch to activate the device. This type of product will then block any other frequencies from affecting the signal quality and it also means there is no re-tuning of the FM frequency when travelling. It comes in two options, one is just a 3.5mm jack lead for any music player and the other is a USB to allow an iPod/iPhone lead to be connected.