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Discussion Starter · #1 ·
So I have one master key and looking to get another and program it myself. I'm looking at keys on ebay. Will any Lexus key transponder/immoblizer work with my 03 Lexus or do I have to get one specifically for the IS300. I'm really only looking for the inside brain parts since im going to get a switch blade casing. I been reading about the keys but didn't come across this question. I'm seeing some for sale that has the same look as the IS300 key with the 3 button but the item description doesn't list IS300, it list other models but will they work with the IS300?

Thanks,
John
 

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Nope. Gotta make sure the chip is specifically for the IS 300. I ran into this issue with a key I got off eBay in which the transponder was for an ES. Although I could program the remote, the immobilizer was never able to program.
 

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Plus you want the trunk release on the remote.
The RX ones I was sent by mistake didn't have it, so I RMA'ed them and they sent IS ones.
 
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