What is the recommended action if a seat belt does not lock properly?

The recommended action when a seat belt does not lock properly is to inspect for damage and test retractibility. This is crucial because a seat belt that fails to lock could compromise passenger safety during a crash. By inspecting the seat belt, you can identify whether there is any visible damage or wear that could be affecting its function. Testing the retractibility allows you to ensure that the seat belt retracts back into its spool correctly, which is essential for the belt's proper operation and securing the occupant properly in the vehicle.

Taking this approach allows for a thorough assessment of the seat belt system before making any decisions about repair or replacement. In situations where the belt is found to be damaged or malfunctioning, further action such as replacement may be deemed necessary to ensure the safety of passengers.