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Old 09-01-2010, 11:46 PM   #1
pyrocrickett
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Join Date: Sep 2007
Location: Las Vegas
Posts: 100
My Ride: 2004 330i ZHP
TCU Transplant: X5 to E46

My wife's '04 X5 has an Assist TCU module that she's letting me take for my 3er for the Bluetooth functionality. I've already cross-checked the P/Ns for E46 compatibility (the TCU's P/N is 84 11 6 952 218) & I'm 99% confident the physical transfer (mount points, cables & plugs, etc.) will go perfectly. My only concern - & question for you all - is whether I'll run into any programming issues. From this TSB, it seems that they're coded for a specific VIN, though I wonder if that will impact the Bluetooth functionality.

So, has anyone taken a TCU out of another vehicle & successfully used it in his own?
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Old 09-02-2010, 03:50 AM   #2
Arty
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Yes the VIN is coded into the unit. You can change it with Navcoder and Resler interface. The VIN is only used for BMW Assist calls.
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Old 09-02-2010, 06:36 AM   #3
pyrocrickett
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Quote:
Originally Posted by Arty View Post
Yes the VIN is coded into the unit. You can change it with Navcoder and Resler interface. The VIN is only used for BMW Assist calls.
Thanks for the info! It's good to know it can be changed, but the bolded part makes me think I shouldn't need to bother with it, since I have zero plans to use Assist in my 3er.

Anyone else have experience transplanting a TCU?
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Old 09-02-2010, 07:18 AM   #4
Arty
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TCUs from other models are always fitted to other cars. It is the norm rather than the exception. The X5 units are newer and more plentiful used. The part numbers are shared between the models if you check realoem.

Last edited by Arty; 09-02-2010 at 07:19 AM.
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