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      07-18-2012, 07:45 AM   #5
GenePoole
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Drives: '06 E90 330i
Join Date: Apr 2010
Location: Brighton, IL

Posts: 537
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Quote:
Originally Posted by Hernan View Post
Can a used e90 CA transmitter be re-programmed for my car?
As far as I know (for E9x), no FOB that has ever been programmed to a car can ever be used again in a different car. It is possible to code a brand new FOB with some expensive tools out there, or, (I've heard) replacing a chip on the FOB with a new (never programmed chip). Of course, there are rumors that it is possible if you have read/write access to the CAS EEPROM, but I still don't know of anyone who has done this.

There is apparently a tool that can plug into the OBD port and program a blank FOB without even having any other access to the vehicle. You can break a window, plug in the tool, program a blank FOB, and drive the car away with the new FOB. Scary stuff:

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