The water pump on my 2007 Avalon is leaking, mainly on shut down. I didn't see any threads that suggests this is a common problem (did in the Tundra section). Anyone else have issues? Whats a typical replacement cost? AutoZone lists the pump at $107!! and I dont think I want to attempt this in the middle of winter. This car only has 56K miles on it..... Thanks for any info (and commiseration).