Hi

I am hoping to add bluetooth to an E46 that has not got it, nor has the cabling for it, by making up some cabling for power, ibus and audio via a mute box. I have an aftermarket Alpine media station head unit fitted.

I am in possesion of a 2005 TCU +SES module. It has a 54 pin connector. Does anyone know the BMW part number of the barebones connector so I can buy one and make up a loom? Else is a cheap loom with the 54pin connector available? I saw mention of a 25pin to 54pin adaptor, is there a BMW part number for it?

Also is the audio signal on pins 37/38 the caller's voice, and is it an amplified signal or line-level?