It has a timing chain that should last the life of the engine.
The 2003 2.5 CRD Jeep Cherokee has a cam belt not a chain
3.7l have a timing chain. If you have a 2.8l it's a timing belt.
chain
A chain
The 4.3 litre V6 engine in a 2003 Chevrolet Blazer has a timing CHAIN
timing chain
It has a timing CHAIN
The 3.5 litre V6 engine in a 2003 Infiniti G35 has a timing CHAIN
The 2.2 litre four cylinder engine in a 2003 Pontiac Grand Am has a timing CHAIN
The 3.1 litre V6 engine in a 2003 Buick Century has a timing CHAIN
The 3.8 liter V6 engine in a 2003 Ford Windstar has a timing CHAIN