2012 Key Fob Replacement - JeepForum.com
 
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post #1 of 6 Old 06-12-2017, 06:51 PM Thread Starter
prototype4342
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2012 Key Fob Replacement

I'm sure this is the 100th thread on this but I just want to get a couple things straight that I am having trouble understanding from other threads. My 2012 Limited only came with one key [dealer stated they would replace the second one but has since renigged on that]. I am looking into options of getting another key and found some unlocked OEM ones on fleabay for a fraction of the cost of a new key. My questions are: Can a new key be programmed by anyone except the dealer? I see some people saying locksmiths may be able to do it etc but apparently things changed after the WK2 came about. Does the Enter-N-Go system matter for the programming process, aside from needing the correct key? I know the flipper glass popper will work if you get a remote with it, but will the trunk popper? Lastly, once I get a second key programmed, is there an at-home solution for programming a third key, or is it still suck it up and have the dealer program it?

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post #2 of 6 Old 06-12-2017, 07:57 PM
ColdCase
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Dealers will only program OEM FOBs, saying aftermarkets are more trouble than they are worth. Dunno what fleebay means by unlocked. The OEM FOB can only be programed once. There is no unlocking. You need to start with a fresh blank FOB. The early WK2s, 2011s and 2012s I think could be programed (blank FOB) by locksmiths, but that changed by 2013 I think. Early WK2s also had a PIN used for programing FOBs which may had something to do with it.

"Each FOBIK has a unique transponder identification code permanently programmed into it by the manufacturer. Likewise, the WIN has a unique Secret Key code programmed into it by the manufacturer. When a Sentry Key FOBIK is programmed into the memory of the WIN, the WIN stores the transponder identification code from the FOBIK, and FOBIK learns the Secret Key code from the WIN. Once the Sentry Key FOBIK learns the Secret Key code of the WIN, it is permanently stored in the memory of the transponder. Therefore, once a FOBIK has been programmed to a particular vehicle, it cannot be used on any other vehicle"

For keless entry and go you need a FOB that supports that feature and RKE. The vehicle security module will interrogate/look for the FOB inside the vehicle before allowing the vehicle to start. For unlocking the door, there is a challenge reply sequence between the FOB and security modules.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #3 of 6 Old 06-13-2017, 07:11 PM
DRKRED12
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There is one on ebay in the original package for 69.99 that you may want to look at.
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post #4 of 6 Old 06-13-2017, 10:38 PM Thread Starter
prototype4342
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Quote:
Originally Posted by ColdCase View Post
Dealers will only program OEM FOBs, saying aftermarkets are more trouble than they are worth. Dunno what fleebay means by unlocked. The OEM FOB can only be programed once. There is no unlocking. You need to start with a fresh blank FOB. The early WK2s, 2011s and 2012s I think could be programed (blank FOB) by locksmiths, but that changed by 2013 I think. Early WK2s also had a PIN used for programing FOBs which may had something to do with it.

"Each FOBIK has a unique transponder identification code permanently programmed into it by the manufacturer. Likewise, the WIN has a unique Secret Key code programmed into it by the manufacturer. When a Sentry Key FOBIK is programmed into the memory of the WIN, the WIN stores the transponder identification code from the FOBIK, and FOBIK learns the Secret Key code from the WIN. Once the Sentry Key FOBIK learns the Secret Key code of the WIN, it is permanently stored in the memory of the transponder. Therefore, once a FOBIK has been programmed to a particular vehicle, it cannot be used on any other vehicle"

For keless entry and go you need a FOB that supports that feature and RKE. The vehicle security module will interrogate/look for the FOB inside the vehicle before allowing the vehicle to start. For unlocking the door, there is a challenge reply sequence between the FOB and security modules.
Looks like they may replace the electronics inside? Either way it says guaranteed to be programmable so there's no risk really, and they say it's OEM equipment too. I didn't get a chance to call down to the locksmiths or dealer today. Need to verify the dealer will still program a key if I don't buy it from them.
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post #5 of 6 Old 06-14-2017, 10:01 AM
ColdCase
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Also, many used car dealers will program FOBs for you. Costs maybe $100, takes like 10 minutes.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #6 of 6 Old 06-19-2017, 12:36 PM
PlainoldCheroke
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My locksmith charges $75 for this type ( mine is a 2011) and he carries some that he can sell you and program, just like the dealer. From older models, the locksmiths could make clones ( the electronics mimic the first key) even though the systems are engineered to recognize several different unique keys. Find the best locksmith and ask who has the programming devices before you over pay for programming or before you buy one that won't work.

1995 Cherokee 4.0 with no power options.;
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