Ian - Hope you have more luck than me, I have got to replace all 4 of my sensors on my SC430 and I have had to go thru Lexus at a cost of £738. I have tried all over to get cheap sensors and nobody seems to stock them. If you manage to get some let me know, it's worth keeping note. I was hoping there was a way of turning the warning sensor off, that would have been the better option, but I have been told it can't be done. Good luck - Julie