There is no defined replacement interval, if it is making noise it could require replacement. People have gotten over 400,000 miles on the original chain without needing replacement. I've got 200,000 so far on mine with no issues.
There is no scheduled replacement on timing chains (only on timing belts). Therefore, it only needs to be replaced if it breaks.
It has a timing chain. It never needs be changed.
It could be your timing is off or your timing chain needs replacement.
you don't. 2003 Toyota matrix xrs does not have a timing belt. It has a timing chain which never needs replacing.
The chain, if equipped, needs no replacement and will normally last the life of the engine.
Timing chain usually needs to be replaced each 180-200K miles.
No, it uses a cam chain that needs no replacement.
Normally a timing chain will last the life of the engine. Replace it only if it becomes noisy or you have performance issues related to a worn chain as in jumping time.
Under normal circumstances no, the chain normally needs no replacement. It is designed to last the life of the engine and is replaced during a complete engine rebuild.
a timing belt needs maintenance, but a chain does not.
It means the timing chain needs replacing.
I timing chain rarely needs replacing. A timing belt needs to be replaced at the interval specified in your owner's manual. Don't have one, get one.