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hey there,

I just came across this forum while trying to figure out why my attempt to replace the key fob on my 2003 VW Jetta wagon failed to work. I didn't know about the immobilizer RFID part in the old key fob and once I found out about it, I accidentally broke it while trying to take it out. So now I'm stuck with a non-functioning key (my only one, of course) and am trying to assess my options...
 

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Supposedly you can buy a replacement chip but I"ve never found a source nor does VW sell just the chip. You have to buy a replacement key half and have it programmed by the dealer. If you want to DIY, see the mk4 key FAQ article.

Also, since this is such a specific thread, post moved to mk4 and title edited.
 
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