Specifically, you can expect:
* Immediate loss of power: The engine will likely sputter and die.
* No restart: The engine will not restart normally due to the internal damage.
* Potential for severe engine damage: Bent valves, broken pistons, or other internal damage is highly probable. This will require a costly engine rebuild or replacement.
* Loss of steering assist (if power steering is hydraulic): If the car uses hydraulic power steering, the belt that drives the pump is often on the same belt system as the timing belt. This will result in significantly increased steering effort and make it hard to control the vehicle. This is less of a problem if the car has electric power steering.
* Loss of other accessories: The alternator, water pump and AC compressor are usually driven by the same belt. Loss of these could mean a loss of electrical power, engine overheating and no air conditioning.
Crucially, you'll lose control of the vehicle if it happens at speed. The loss of power and the difficulty of steering require immediate and careful action to bring the vehicle to a safe stop.
In short: A broken timing belt in a 2000 Dodge Intrepid is a very serious event requiring immediate roadside assistance and likely a major engine repair. Regular timing belt replacement according to the manufacturer's recommended schedule is critical to prevent this.