How often should the engine timing belt be replaced?

[DeTessa]

Engine timing belts generally need to be replaced every 3 to 5 years or approximately every 80,000 to 100,000 kilometers. The specific replacement interval depends on the actual usage conditions of the vehicle. If the car is often driven with light loads, the belt can be inspected around 80,000 kilometers and may continue to be used if no issues are found, with replacement recommended between 100,000 to 130,000 kilometers. For vehicles frequently carrying heavy loads or subjected to strenuous driving conditions, the belt experiences greater wear and should be inspected around 60,000 to 80,000 kilometers, with replacement at 100,000 kilometers. As a rubber component, timing belts have a limited service life. Prolonged use leads to natural aging, surface hardening, and cracking. Additionally, since timing belts operate continuously at high speeds, they are prone to wear and potential failure.