It is important to replace the timing belt at the recommended intervals to avoid engine damage. If the timing belt breaks, the engine will no longer be able to time the valves correctly and the pistons will hit the valves, causing serious damage to the engine.
The cost of replacing the timing belt on a 2002 Dodge Grand Caravan will vary depending on the mechanic you choose. The parts and labor costs can range from around $200 to $600.