Interesting statement...
So what problems will it lead to?
I had mine done 19 months ago and I havent encountered any issues whatsoever...
I didn't say will cause you problems, I said could.
I don't know what problems, but this is what Lexus told me when I asked why they couldn't just flash it and re set all new keys to it.They also said they 'couldn't' flash it and that you can't do that. Again this is just what I'm told and not my opinion or statement!
I've also been through this problem so I'm just relaying what I've learnt and found out via Lexus, this forum and key specialists. I followed advice on here which led me on a wild goose chase and I eventually ended up back at Lexus. I had a locksmith say he could do it but he couldn't. I only had 1 valet key for our old IS200 SE, so I was scared of losing it and having no keys. In the end because it was such a headache I sold the car with just the 1 key to an unsuspecting lad. I felt bad about it but he bought with 1 key and now its his problem.