I have a 99 LS400, I had to replace a >key< fob in March, the other fell apart, I ordered a new key + them fixing the codes, it cost me £75 including VAT, note, this was the key fob only, not the transponder as well although I think it was the transponder which was reprogrammed with the codes, Lexus Edgeware Rd, London........as far as the transponder price goes I have been quoted over £300