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Old 08-23-2011, 06:30 PM   #1
Registered User
Join Date: Aug 2011
Location: Houston
Posts: 1
My Ride: 2003 M3 convertible
Exclamation Help with Bluetooth retrofit~!

Hi guys,

Im new to the site, so excuse my placement of this thread if it was in the wrong place. Ive been searching and searching and cannot seem to find an answer

I have a 2003 M3 convertible (without assist) on which I attempted a bluetooth retrofit. I got a TCU unit off of an 2005 M5 and it was pretty much plug and play (less the connectors where the assist cords plug into) and I got it to the point where the 'telephone' function displays on the nav screen, but i cannot for the life of me get it into pairing mode.

I thought it needed coding, so i took it to the dealer, and they coded it...but they cannot get it into pairing mode either.

Am i missing something here?

Everything I read says that the TCU unit should go into automatic pairing mode and will work in this car, but maybe it will only work with a ULF module?

I am stuck.. ;(

Thanks for the help in advance...


Last edited by Loopus122; 08-23-2011 at 06:34 PM.
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Old 08-24-2011, 04:51 PM   #2
Registered User
Join Date: Jul 2008
Location: Scottsdale, AZ
Posts: 68
My Ride: 2005 325Ci Conv
TCU's should automatically pair for the first 2 minutes after the car is started. You should be able to see the BMWXXXXX device from your phone during that period of time. Then just enter the code printed on the TCU. If you don't see that device, perhaps the Bluetooth antenna isn't connected.
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Old 08-25-2011, 05:59 AM   #3
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Join Date: Oct 2009
Location: UK
Posts: 1,030
My Ride: 1999 328i
Check the date on the unit. Pre 09/2004ish the bluetooth was solely for WDCT handsets (The BMW handset). Also try plugging in the seatbelt and make sure you do the pairing in the first two minutes as above.
Arty is offline   Reply With Quote

bluetooth, navigation, retrofit, tcu, ulf

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