If you already have radio with AUX input option, you are half way to use your external source of music. Second half is proper e46 aux cable, which will allow you to connect your smartphone or music player with e46 radio.
Luckily, original BMW e46 aux cable schematic easy to find in the net, but why should you google it, if you already have one here:
Looks easy, right? And it really is.
What will you need to make your own e46 aux cable:
- 3,5mm stereo jack male plug
- two 0,22 uF capacitors (50V will be totaly fine)
- one 300 kΩ resisor (0,25W will do the job)
- one 2x5pin gold pin connector
- few inches of wires
As you can see on the schematic – the cable is quite simple, so I guess you don’t need any more informations to set things up.
It will be totally enough if you solder RC element as a “spider” connection, without any printed board. At this level of complicity, circuit will be durable and long lasting.
You can just make cable like on this schematic and lead jack end of it into some accesible place (like glovebox), but if you are not a big fan of unconnected cables on your dashboard, check my proposition of sorting this out:
complete description of factory-looking dashboard integrated AUX input
Of course you can also buy lots of premade cables for few bucks like this: