I have asked this question of the dealer, twice now. The answer is that it should last for the life of the engine. If you had an older Toyota, like I did, with a timing belt, it had to be changed at an interval recommended by Toyota. No such interval exists for chains, according to my dealer.
The 2006 Toyota RAV4 4cyl has a timing chain.
timing CHAIN
The 4.0 liter V6 engine in a 2006 Toyota Tundra has a timing CHAIN
The 4.0 litre V6 engine in a 2006 Toyota Tundra has a timing CHAIN
Yes , it has a timing CHAIN
The 4.0 liter V6 engine in a 2006 Toyota Tacoma has a timing CHAIN
Yes , the 2.4 litre four cylinder engine in a 2006 Toyota Camry has a timing CHAIN
It must have a timing CHAIN , the Gates website does not list a timing belt for the 2006 Toyota Tacoma 4.0 liter V6
Chain.
Chain
Normall it will last the life of the engine and is changed when the engine is overhauled.
It has a timing belt. Only 2007 & newer Sienna have a timing chain.