1997 Acura Integra Timing Belt

The mileage is more important than the age, since mileage means the engine is running, and that's when wear takes place. I'd be pretty nervous though waiting for 90,000 miles. In the past, Honda recommended replacing the timing belt at 75,000 miles, and they typically broke at 65,000 miles. This is an "interference" engine. That means if the timing belt breaks, the open valves get hit and bent by the pistons as they coast to a stop. That turns an expensive repair into a real expensive repair.

For the cruise control, the fastest approach is to connect a scanner to view "inputs and outputs". That will show if pressed switches are being recognized. Some scanners also show the "reason for last cutout". If, for example, it shows "speed is too low", that's because the car is standing still, but if it still shows that during a test drive, you'd look at anything associated with the speed sensor circuit.

You can rent or borrow tools from a lot of auto parts stores. They might have a scanner you can use, otherwise you'll need to go to a mechanic for a diagnosis.

My opinion is I'm less worried about dry-rot with a timing belt because that's more to do with the sun beating on the rubber. My daily driver is a rusty trusty '88 Grand Caravan 272,000 miles. The timing belt was replaced only once due to a failed water pump that it drove. The difference is my engine is not an interference engine, (nor will I ever own one). At worst I'll be walking home, but I won't have to pull the engine apart to replace bent valves. (Are you listening you idiot engineers?)!

I also have a '93 Dynasty with 4,500 miles. That timing belt is over 22 years old, but I don't have any worries when I drive that car every other year.

You have to remember too that a rubber belt would snap as soon as you tried to run the engine. It's the cords inside that give it its strength, and those don't dry-rot.