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This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 05-05-2013, 11:11 AM   #1
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Join Date: Jul 2004
Location: Maryland
Posts: 127
My Ride: 2002 330i
Problem with ULF Bluetooth module

Background: 2002 330i

A couple of years ago I purchased a ULF installation kit from bimmernav.com and put in an entire BT system, and although I had a couple hiccups at first, it has served me well for the past 6-7 years.

The ULF module is the original ULF module and while it has its issues, it worked with a bunch of upgraded Blackberry Phones over the years, so I never got too worked up about it.

This past week, we've upgraded to non-Blackberry phones, and while I was able to pair the phone to the ULF, as soon as I attempted to call, it froze the ULF module. I mean it froze it to the point where I had to disconnect the power to the ULF module.

So I figured it was time to upgrade the ULF module (BMW part # 84109154358), but was surprised when I found a couple things:

1) The ULF module I assumed would be cheap at this point. Oh no, they are $500-600. They are relatively rare.

2) However, what seems to have changed is that the 2005 and later BMW's came with a TCU module which has "Assist" (which I don't need), but also supports bluetooth.

The TCU modules seem to be more plentiful, but that raises two points:

1) Is this a one-to-one swap for the ULF?
2) If so, is there a paricular part number I should be looking for?
3) The TCU does not make use of the BT pairing button, will the existing TCU have a problem with that button?

I'm a bit lost here, and was wonder what you thought?
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Old 08-28-2013, 04:25 PM   #2
Registered User
Join Date: May 2013
Location: bklyn
Posts: 113
My Ride: 2006 e46 Cic
What was your outcome. Did you install ulf or tcu, i have a 2006 e46 with navi but no assist, and no ulf, and i got a first generation ulf complete with antenna and pairing button from a friend for free that i installed. I know there are many negatives about the first generation ulf but for now i just want to see it work or if i need tcu. So what did you end up doing ????
fraserp is offline   Reply With Quote

bluetooth, tcu, ulf

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