It is crucial that the timing belt be replaced at or before the interval recommended by the vehicle manufacturer. Failure to do so can result in a broken timing belt, which can leave you stranded, and in some cases, it can cause severe damage to the engine.
A worn timing belt can result in trouble codes from the camshaft or crankshaft sensors, causing a dashboard warning light to be lit.
The engine can make slapping or scraping noises if the timing belt is loose or worn. Adjustment may take care of the noise, but replacement may also be necessary.
Best Practices
Timing belts have a mileage and time replacement interval. It’s important on low mileage vehicles that you follow the time interval as noted by the manufacturer.
It is often recommended that you replace items like the water pump, front engine seals, drive belt, idlers, and tensioners along with the timing belt.