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Transponder Key

Tiny
JRFIREFIGHTER533
  • MEMBER
  • 1999 MERCURY COUGAR
  • 200,000 MILES
I have a 99 mercury cougar and the key was broken off in the ignition. The cay will still start with the other half of the key but I was wanting to replace it. I have read that a new key can be programmed at home if you have 2 spare keys but will this work with only 1 broken key? The key is broken near the end towards the grip and does not effect the teeth
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Tuesday, May 21st, 2013 AT 8:11 AM

7 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
No, this procedure is for adding a third key to a working system. Once you change the lock, you no longer have any working keys.
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Tuesday, May 21st, 2013 AT 8:54 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Get a locksmith to fabricate a new key for you and reuse the present transponder.
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Tuesday, May 21st, 2013 AT 10:00 AM
Tiny
JRFIREFIGHTER533
  • MEMBER
  • 12 POSTS
Ok, thanks for the quick replies and the information. By chance would you happen to know about how much they a locksmith would charge in I purchased a key myself and had them cut and change the transponder?
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Tuesday, May 21st, 2013 AT 10:29 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You would need to check with the locksmith to be accurate. Prices varies depending on location.
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Tuesday, May 21st, 2013 AT 10:33 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You're still going to have to deal with the broken piece stuck in the lock.
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Tuesday, May 21st, 2013 AT 11:06 AM
Tiny
JRFIREFIGHTER533
  • MEMBER
  • 12 POSTS
The locksmith should be able to remove whats left of the key correct?
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Tuesday, May 21st, 2013 AT 2:20 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Yes, the locksmith would be able to remove the piece from the lock.
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Wednesday, May 22nd, 2013 AT 5:08 AM

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