I have recently hit the 90,000 mile mark with my 2006 Highlander Hybrid. I have been taking my car to a local mechanic, rather than the dealership, and have been pleased with the service received. My mechanic gave me an estimate for replacing the timing belt which included replacement of the water pump. When I printed out the recommended Toyota maintenance schedule, it did not suggest replacement of the water pump. The mechanic also suggested addition/replacement of antifreeze, P/S belt, A/C belt. As the car is in a subtropical environment now, is it necessary to replace the antifreeze? And what is a P/S belt and A/C belt. Again these items do not appear on the official maintenance schedule. Help. I confess I know very little about cars and do not want to appear stupid or be taken advantage of.