You don't as it has a chain not a belt.
Factory recommended at 90,000 miles.
Factory recommendation is 90,000 miles.
It has a belt. Replace it every 90,000 miles.
The 3.3 liter V6 in a 2007 Toyota Highlander has a timing BELT
I have a 2006 Toyota highlander hybrid, do I need to change timing belt or chain?
The manual states at 90,000 miles.Factory recommends 90,000 miles.
In 2008 the Toyota Highlander V-6 engine was equipped with a timing CHAIN.
Timing belt
Go to 'you tube'. There are several videos showing step by step instructions on there.
No . Have some mechanical assistant
Both the 2.7 liter four cylinder engine and the 3.5 liter V6 engine in a 2009 Toyota Highlander have a timing CHAIN
The 3.3 litre V6 engine in a 2005 Toyota Highlander has a timing BELT