you don't. 2003 Toyota matrix xrs does not have a timing belt. It has a timing chain which never needs replacing.
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.
The curb weight of the 2003 Toyota Matrix is 2679 lbs..
The 2003 Toyota Matrix has double overhead cam (DOHC).
The height of the 2003 Toyota Matrix is 5 ft. 0.6 in. (60.6 in.).
The 2003 Toyota Matrix runs on regular unleaded.