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Old 12-13-2005, 12:48 AM
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Join Date: Mar 2005
Location: Denver, Colorado
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benathon is on a distinguished road
I get work done at Schomp. Chris Adams is a first rate service guy. I get all my problems fixed and I get my car washed while drive a loaner...

I will never go to Murray ever again even though I live by Cherry Creek Mall, the SA are terrible. I don't even want to start on them...
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Old 08-27-2008, 07:11 AM
Join Date: Feb 2006
Location: Australia
Posts: 51
luke.jenner is on a distinguished road
BMW Assist Retrofit to 2004 Solved!


I know this has been around a while but no-one seems to have a definitive answer posted so I thought I would clarify things.

There are actually two 'eject box wiring compatibility issues'. The first is that the combined assist/BT module (which is designated option SA633 by BMW) is designed to operate with Eject Box #84-21-6-946-063. SA644, which is the standard BT telephone without assist, is designed to operate with Eject Box 84-21-6-933-415. The eject boxes are physically the same - however the wiring is different. Photos of this eject box - as I installed in my X5 - are below.

It is possible to covert from one eject box to the other - to do this you need to follow the wiring diagrams for each and work out the different pins for each system. The only difference between the two eject boxes is that the brown/white/red & green wires goes to different pins on the same plug.

The second 'eject box wiring compatibility issues' is what is alluded to in the post above which is the fact that the antenna lead from the eject box in an '04 is male and so is the corresponding connection on the TCU. The cable shown above (84 32 0 138 217 which is a standard BT cable with a white Fakra connector at one end and a black/purple connector at the other) will NOT solve this problem without modification. The black/purple fakra female connector will plug into the cable to the eject box but the white connector will not match the TCU without modification. The correct coloured Fakra connector to plug into the TCU would be WINE RED. The difference is the slots are at different positions. To modify the white connector REMOVE IT FROM THE CABLE using a small jewellers screw driver and use a utility knife to cut a slot in the correct position! Then place the connector back onto the cable and connect to the TCU. Photos are below BUT NOTE I CUT THE SLOT ON THE WRONG SIDE SO HAD TO RECUT ON THE OTHER SIDE!

The cable from the bumper antenna will simply plug into the TCU!

I hope this helps!

PICS ATTACHED IN THREAD: http://www.xoutpost.com/bluetooth/141...tml#post510268
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