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Old 08-24-2006, 11:41 PM
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Join Date: Aug 2006
Location: Calgary
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Deemo is on a distinguished road
27.1 Causing Problem w/ BMW Assist???

I purchased a second hand 2005 M3 and installed 27.1 over the exisitng software before bringing it to the dealership.
I had some work done and also asked to get BMW Assist going for one year.
They couldn't manage to get it going and blamed it on possibly a bad DIS or something (couln't get a code from it).
I don't know if it is a faulty unit or if it was something I did when installing 27.1.
Can anyone help me out?
They said they didn't have time to debug the problem and that I would have to bring it back.
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Old 08-28-2006, 11:07 PM
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Join Date: Dec 2005
Location: Seattle, WA, USA
Posts: 829
apw2607 is on a distinguished road
Not sure .... you could ask them to simply recode the TCU. V27.1 shouldn't have caused any issues ... so long as its still in USA mode ... ? If the NAV has switched itself to Euro mode, no accept screen for instance, route magnet feature available ... then YES, this can screw up the Assist TCU, and recoding on that is necessary ... as well as recoding the NAV unit back to USA mode.

If it turns out that your BMW Assist only TCU has failed, and you are out of warranty .... then I can sell you a BMW Assist Only TCU from my 2004 M3 -send me a PM. It worked fine, but I upgraded it to the Bluetooth/Assist Combo unit. I've had it lying around for a year or so !
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