What is the service life of seat belts?
2 Answers
The service life of seat belts is about 3 to 5 years, and they should be scrapped in advance if any abnormalities are found. Car seat belts are devices used in vehicles to ensure the safety of passengers and drivers by preventing airbags from causing harm when the vehicle body is subjected to severe impact. Their function is to absorb impact energy, counteract inertial forces, and prevent or reduce the severity of injuries to occupants. The steps for using seat belts are: 1. Pull out the seat belt and fasten the buckle tongue to the buckle to ensure the belt secures the body; 2. Adjust the position of the lap belt so that it sits across the hips; 3. Adjust the position of the shoulder belt so that it crosses over the collarbone; 4. Before driving, check that the seat belt is secure and functioning properly; 5. Hold the buckle tongue, press the release button to retract the seat belt into the retractor, and place the buckle tongue in the storage position.
Seat belts don't actually have a strict expiration date like smartphone batteries with fixed lifespans. They're designed to last the vehicle's lifetime, functioning properly until the car is scrapped. However, improper usage—such as frequent exposure to sunlight where UV rays can make the fabric brittle, or involvement in collision accidents that may deform or damage load-bearing components—requires immediate replacement. I've seen many vehicles with decade-old seat belts showing dangerous signs like loose buckles or jammed latches. It's recommended to inspect the seat belt system every five years: check for smooth retraction, secure locking, unusual noises, or color fading. Routine maintenance should avoid chemical cleaners; keeping them clean and dry extends longevity. Safety comes first—never cut corners. When replacement is needed, don't hesitate, as lives depend on it during critical moments. A quick DIY inspection takes little effort.
