TCU - Can I tell which one

X5Bill · #1 06-25-2009, 09:00 AM

Can I tell which TCU I have without pulling the plastic cover off? I can see the side and back of the thing, but I can't tell the model number and since it has a bluetooth antenna, I want to make sure the PO did not update. TIA!!

X5Bill · #2 06-25-2009, 08:18 PM

Ok Guys, I took the TCU out and here is the numbers....can you tell me what I need to do next, just get the most current TCU? Also here is the Bluetooth antenna connected to the existing TCU

2006BMWx5 · #3 06-25-2009, 09:19 PM

Quote:

Originally Posted by X5Bill

Ok Guys, I took the TCU out and here is the numbers....can you tell me what I need to do next, just get the most current TCU? Also here is the Bluetooth antenna connected to the existing TCU

wish I could help but I will at least give u a bump. Sorry for being dumb but what is a TCU and what does it do?

X5Bill · #4 06-25-2009, 10:18 PM

It's fine I never had a clue what a TCU was till I got my X5...now I know that they control the telephone in the cars and the one you have is the one I want, so I can use bluetooth handsfree...all I have now with the current TCU is Assist...

2006BMWx5 · #5 06-25-2009, 10:22 PM

Quote:

Originally Posted by X5Bill

It's fine I never had a clue what a TCU was till I got my X5...now I know that they control the telephone in the cars and the one you have is the one I want, so I can use bluetooth handsfree...all I have now with the current TCU is Assist...

ok. Yea the hands free is cool. I actually would like to get the voice modual to control the nav. I have been keeping an eye on eBay. Good luck!

jsears · #6 06-26-2009, 02:51 PM

Quote:

Originally Posted by 2006BMWx5

ok. Yea the hands free is cool. I actually would like to get the voice modual to control the nav. I have been keeping an eye on eBay. Good luck!

How do I find out if I have voice control for my Nav?

X5Bill · #7 06-26-2009, 03:14 PM

You probably have it, but it is not turned on, I think Navcoder will turn it on...or the dealer...

P.S. I pulled the trigger on the new TCU from Tischer, now I will have Bluetooth!!

abster641 · #8 06-25-2009, 11:26 PM

http://www.bimmerboard.com/members/p...artNumbers.pdf Hopefully this answers the question about what module you have. It should just be a straight swap to a newer TCU.

Good luck!

VetteRacer · #9 06-26-2009, 12:05 AM

X5Bill, does it not work? Pic makes it look like it has BT... Why swap it out?
Matt

Brian-bmw · #10 06-26-2009, 08:18 AM

All you need to do is swap the TCU. The link that abster641 posted is the best reference for TCU part numbers I have seen. Your TCU, part number 84.11-6 945 940, had one month of production from March 2004 - April 2004. Bluetooth is first confirmed in TCUs starting September 2004. And, voice recognition did not arrive until March 2005.

Furthermore, the BMW Service Information bulletin SI B84 13 04 explains that your car was produced too early to have Bluetooth. Here are a couple quotes...

The E53 did not get Assist with Integrated Bluetooth until carsproduced from "10/04 production with Premium Package (ZPP) or BMW Assist (SA 639)."

And, further in the SIB, there is the encouraging upgrade statement "E53 vehicles produced between 3/2004 and 8/2004 are equipped with a TCU that does not support Bluetooth. On these vehicles, the TCU can be replaced at the customer's expense with a 2005 MY TCU. Cradles may not be added to these vehicles because of wiring incompatibility."