Where can I get cheap replacement Lexus tyre valves?

I drive a 2003 Lexus 430SC. Recently I had a flat tyre and the local tyre garage found that the tyre valve was leaking. The only people who sell a direct replacement are Lexus, who want £189. Replacement for other makes cost about £50. Any ideas where I can get a replacement at a sensible price?

Asked on 20 July 2013 by NP, via email

Answered by Honest John
TPMS valve monitors are multi metal and in a hostile environment where they are subject to corrosion. Your options are to replace the failed 10 year old valve (which has lasted well) with a compatible Lexus item, then be prepared for the others to fail. Or replace the TPMS system entirely with one from Tyrepal.
Similar questions
How accurate are the tyre pressure monitors factory fitted to the wheel rim. have a 71-plate BMW 118 and after using the gauge on the pump to inflate the tyres to the correct pressure, the electronic information...
I have recently purchased a Skoda Octavia which is fitted with low profile tyres. Can it be fitted with normal tyres? The existing tyres are 225/40 R18
At a recent service for my Volvo XC60 I asked for the wheels to be swapped back to front to even out wear - as suggested in the Volvo handbook. This was not done as I was initially told that it was not...
Related models
Refined, comfortable express with plenty of room, bags of luxury kit and the sturdiest build quality this side of an underground nuclear shelter.