Read all the past comments about wheel corrosion and encouraged to ask for replacements. Plymouth fitted fresh wheels with no hassle 1 week short of guarantee running out. These are apparently lacquered refurbished but look OK. Still not sure of reason for corrosion - told about lack of lacquer (sorry), salt, poor alloy from Japan (due to environmental issues), thin lacquer (25micron not 125 micron as used by Volvo). Told to clean with alloy cleaner but also told this will do no good as the alloy is poor quality (not as good as European alloy (we must not bother about pollution!) and will corrode from inside. Apparently refurbisher only guarantees for 3 months. Lexus apparently will replace fresh ones if problem seen again. Lexus not sure if new grey ones are any better yet as they have not been around long. Bit confusing really. Anyway tyres are OK at present so I will keep an eye on them ??? ;)