Water Pump issue, after taking in for Recall

[GeneralDon7]

Ok, so today I took my 2007 Sedan, into get that recall seatbelt issue fixed, by the way, I havent noticed any difference in outside noice. I was told that my water pump was malfuctioning an they have to replace it, even though the car never showed me the check engine light, the toyota person told me, that it wasnt a big issue, so I scheduled it for 2 saturdays from now. Has anyone else had this issue?, its covered under warranty, so its a free fix either way, i was just curious how commmon this was. My car has 40000 and is 2 years old. Good thing I havent gotten the water pump pulley upgrade yet.