"preventive maintenance" for water pump
Digi, had I known about this problem earlier, I would have had more of my regular services done by a dealer (I use a friend's independent import shop most of the time for non-warranty work) and I would have asked that they check the water pump for leaks every time. I would have also made sure that the inspection was noted on the receipt every time. Even though our car wasn't losing any significant amount of coolant, they said it showed some leakage, so that would probably be the first indication of the problem. Toyota knows there is a problem or they wouldn't be on their third part number for the replacement pumps. Anything to paper your trail on this issue would give you a leg up dealing with Toyota Customer Service if you had a failure shortly after the warranty expires.