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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Can a 7 series FOB be programmed for the e90



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      07-17-2012, 10:24 AM   #1
Hernan
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Can a 7 series FOB be programmed for the e90

I have an LCI e90 with CA and seem to have lost my FOB 2.

I am pretty sure I can purchase a used 3 series FOB and have it re-programmed. Can I get the nicer looking 7 series FOB and have it work?

It looks to be the same size on the plug end to re-charge, and I can't imagine BMW spent the money to engineer 2 different alarm system radios.
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      07-17-2012, 11:43 AM   #2
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No. Different frequencies, different shape, different size. Won't fit in the key hole
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      07-17-2012, 12:01 PM   #3
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Darn. Thanks for saving me $50.
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      07-17-2012, 01:24 PM   #4
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Can a used e90 CA transmitter be re-programmed for my car?
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      07-18-2012, 07:45 AM   #5
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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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      07-18-2012, 08:30 AM   #6
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There are so many used FOBs for sale on eBay, and many of them reference re-programming. So either they are ignorant or thieves.

Either way, eBay should require a disclaimer for something like this.
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      07-19-2012, 04:11 PM   #7
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Quote:
Originally Posted by GenePoole View Post
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:

can't do this in the US. Only the dealers can program new keys here
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