I have a 92 Accord, and there are only 2 belts that he can be referring to, one is the drive belt, which spins (drives) the power steering pump, a/c compressor, water pump, etc. the other is probably the one he is referring to, that's the timing belt. Honda recommends it be changed every 90k miles. If this belt isn't changed every 90k, it may break, and the accord has what is called an 'interference-' engine. This means that if the belt breaks, the valves and the pistons will strike one another, causing extreme damage to the engine. Note that if it is time to change the timing belt, u should also change the water pump, as it is easy to do at this time, and will cost much more down the road if u have to change it later, paying someone to disassemble much of what was done to replace the belt. Let me know if u have any other questions, or if I didn't answer your question clearly.