Question about Land Rover Discovery

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I opened my 04 discovery with one key, when I started it a little while later I did it with the spare key the car started but the horn sounded continously it only stopped when I inserted the first key in the ignition and started the car with it.

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Your spare key probably isn't programmed for the car. Ford uses a stupid chip in the keys. I have the same issue with my Explorer. You have to buy a key from the dealer and have them program it for you. About $50-75. (Ford owns Land Rover, in case you were wondering)

Posted on Nov 07, 2008

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I found this results:

1) http://www.ehow.com/how_7959967_do-land-rover-discovery-ii.html

2) If it has the Factory Security, and you cannot Disarm by Remote or Turning Door Key Lock to the Unlock Position:

Disconnect the Positive Battery Cable.
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