dstompkins

I have a Feb. '04 build and my TCU didn't support BT.
I now have a new TCU b/c the old one broke and according to everything I've read here, all that should be needed is BT to be software enabled.
My dealer is telling me I need a ULF...does this make sense to anyone?

Iceman

Your dealer has probably read the following document:

BMW_Assist_ULF_TSB.pdf

As you can see, it is NOT for the E60.

Some here on the forum have had their TCU switched and BT installed succesfully.
It seems this can be done, w/o switching the ULF and w/o switching the wiring harness...

E60COYOTE

dstompkins - Can you give us your TCU #'s for reference? I have the same build date and am wondering if I have the TCU that doesn't support BT. How did your TCU break?

jksanford

Yes, please tell us the symptoms that you had that caused them to replace the CPU. I'm in the same boat as you were.

Also, list any part numbers from the receipt.

thanks,

James

dstompkins

On my 2/28/04 build car (w/nav) my old tcu did not allow BT. My new tcu (part # 84-11-6-955-688) allows for BT after a software "enabling"...dealer is charging 2 hours shop time. This is more than just the regular CIP update...Although no one seems sure, it appears to be re-coding of the tcu (perhaps by RO). I am not doing it at this time b/c I already have the CPT9000 and I'll wait. Would do in a second if I didn't already pay 1k on the car phone.
As to the symptoms resulting in the tcu being replaced under warranty, my I drive would reboot during calls using the CPT9000 phone. A fault scan was done and showed a bus fault in the tcu. I suggest that you request a fault scan be done on your tcu and that may find a "problem" that you didn't know existed.