all i no is it is a 2002

i have the BM54 in mine buddy

Oh didnt realize hes in the uk. Mine didnt have it either i had to pull out the radio and plug in the pins into the back of the radio

Alex, I am an old dude, and when you say "no" meaning "know" it takes me a minute to digest... lol...

What are the last 7 digits of your VIN? you can PM me if you wish...

hahaha sorry buddy and i am not at home but can get them you tonight if that's ok

this is the bmw part # 82110149391

I see... this part number is a dublicate/replacement for 65 12 0 153 503... priced rather more attractive than the 503 part... this one is good if you have a pre-wired connector hidden behind the monitor already... there are three variations of this harness
65 12 0 153 501 - E46 with SA 661+650 only
65 12 0 153 502 - E39/E53 with SA 661+650 and E83/E85/E86 with SA 662/609 only
65 12 0 153 503 - E39/E46/E53 with SA 602/609 only

this is what i built for myself for about $5 in parts and cut in my desired length as my AUX is gone to the central console storage bin... I have a post on that in my 4.8 to do/done thread...

the factory specs indicate that the 3-pin pre-wired connector was wired up behind the screens since the 10/2002 production date... without that connector, we need to get into the BM54 directly... depending on the date of the BM54, you might not have the AUX input available/activated... if that is the case, we would need to bring into the picture the heavy guns...

There is guy soomewhere in the UK who is the GURU on the BM53/54... his name is Boris or Baris, not sure... but he can upgrade the firmware on the radio, activate inputs, add some features... he has a website and is very responsive in his emails... before bothering him, lets see if we can manage without disturbing the man...

ok buddy thanks for your time to are giving me

USASpec aux input adapter. works beautifully. And they have a DSP version as well