The last time my wife took our 2006 Toyota Sienna in for service, the service manager reminded her that the next visit would be the 90,000 mile service and told her that in addition to the belts (timing belt as well as the serpentine belts as called for on the maintenance schedule), the water pump would also have to be replaced. When she spoke with a couple of the mechanics she was advised that this is the dealer's policy because it (the water pump) may fail in the futute and if it does they will have to charge her for installing another new set of belts including the timing belt.
Needless to say, I am very skeptical about this. I know that water pumps eventually go, but not usually at under 100k miles. I feel that if Toyota water pumps don't last, then the factory should include the replacement of the unit on the service schedule.
Has anyone else run across this? Any advice is helpful