Although this is mentioned in the book, I highly recommend that all of you write down the keycode on a piece of paper and keep a copy at your house as well as in your wallet. If you ever lose your keys a dealer or locksmith can cut you a new one right away. All they need is the numbers from that keycode and you will avoid a lot of time and hassles. Just a suggestion.

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2001 Xterra 4x4 SE Yellow
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2001 Xterra 4x4 SE Yellow