you don't.
2003 Toyota matrix xrs does not have a timing belt. It has a timing chain which never needs replacing.
It has a timing chain
Chain
when do you change timing chain on 2003 Toyota 4-runner?
Yes, it has a chain that should last the life of the engine.
yes
The 2003 Toyota Matrix has 16 valves.
The 2003 Toyota Matrix has an inline 4 engine.
The 2003 Toyota Matrix is a gas-powered vehicle.
The 2003 Toyota Matrix has a 5-speed manual.
The 2003 Toyota Matrix's turning circle is 35.5 ft..
The 2003 Toyota Matrix has a drag coefficient of .32 Cd.
The 2003 Toyota Matrix is 14 ft. 3.3 in. (171.3 in.) long.