Following a crash, it becomes essential to inspect every seat belt assembly element, which includes retractors together with height adjusters and buckles and pretensioning assemblies, as well as front seat belt slide bars and child safety seat securing parts and hardware components. Seat belt assemblies need replacement according to technician assessments of their condition, except when they demonstrate no damage and proper functionality. All seat belt assemblies which did not participate in the accident need a detailed check-up whose findings warrant replacement of components with noted issues. The correct operation of seat belt assemblies relies on regular checks that detect potential damage which occurs after severe stress. The attaching areas of new seat belt assemblies require an inspection which should reveal any damage or distortion beforehand; any detected damage calls for restoring sheet metal to its proper shape with intact structural quality. Perform the Seat Belt Functional Test only after checking that all attaching points are in proper condition, then set up the new seat belt assemblies.