Generally speaking, the replacement cycle of the timing belt is 60,000 to 100,000 kilometers. However, the specific replacement time should be determined according to the vehicle's maintenance manual and combined with the actual vehicle usage scenario. If the vehicle is often driven in harsh environments, such as high temperature, high load or frequent start and stop, the wear rate of the timing belt will be significantly accelerated. In this case, it is recommended to check the timing belt at 60,000 to 80,000 kilometers, and consider whether to replace it based on the inspection results. For vehicles with low mileage but long service time, even if the mileage does not reach the recommended replacement standard, you should go to a professional 4S shop regularly to check the aging of the timing belt. During the inspection, if cracks are found on the surface of the timing belt and a strong rubber smell is emitted, it should be replaced immediately to avoid potential safety hazards.
In addition, if the vehicle's maintenance manual mentions that the timing belt needs to be replaced regularly, then the vehicle uses a timing belt; if the manual does not mention the timing belt replacement cycle, then the vehicle is likely to use a timing chain. Although the timing chain is basically "maintenance-free" in design, car owners still need to pay attention to it, because during long-term use, the timing chain may become loose due to stretching, causing engine performance to decline and even triggering the engine fault light.
