Do i need to have the timing belt replaced on A 2007 Toyota Camry XLE? And when

Do you even know what a *timing belt* is? .. Copy and paste the link below from TOYOTA MOTORS and READ!! . http://toyota.custhelp.com/app/answers/detail/a_id/7690/~/does-my-vehicle-have-a-timing-belt-or-timing-chain%3F

Serpentine belt is what I replaced on 2007 Camry and timing belt on 2005...had my years crossed...Anything else