the manufacture reccomends it be replaced in 90,000 miles
The 3.8 liter V6 engine has a timing CHAIN
The 2003 Ford Mustang does no have a timing belt, it has a chain which requires no maintenance. Replace the water pump when it starts leaking. It should last 100,000 miles or more.
It has a timing belt that should be replaced every 90,000 miles.
Timing belts for most vehicles are supposed to be replaced at 60k. Some vehicles at 90k.
The timing "chain"will start rattling at around the 100k to 110k mark. This is when it should be replaced
chain
nissan micra has timing chain or cam chain and should be replaced at 200.000k
The 3.8 liter V6 engine has a timing CHAIN
Timing chains normally last the life of the engine and are replaced when the engine is rebuilt.
It MUST be replaced every 105,000 miles or 10 years whichever comes first.
If it is a 4cyl then no. It has an upper and lower timing chain. If it is a 6cyl then yes. It has a timing belt, an idler, and a belt tentioner that all should be replaced at the same time.
The 3.8 L - V6 engine has 1 timing chain