hi, i too was in the same dilemma regarding the cambelt , my car came up to being six years old and i was advised by the dealer to get the cam belt done at 60k even though its only done 35k. so i emailed lexus gb and asked them, they told me its been changed from the 10year, 100k interval to the 6 year 60k, even though the service manual says 10 years. i had it done at the end for peace of mind.