On a 1999 Camry (4cyl, made in Kentucky), the passenger side radiator fan is rattling a good bit; enough to overpower the what used to be the quiet interior of the vehicle as well as draw attention from those we drive past. In a quick inspection, I've noticed that the passenger side fan blade rotates very rough when turning by hand.
I figured it would be a simple replacement. For $75, I can buy the motor, fan, and shroud as a single unit from autopartscorner.com. But there's one little odd thing about the fans. While both fans are OEM Toyota parts, is there any particular reason the driver's side radiator fan has 5 blades and the the passenger side has 4 blades?