As part of the inspection process after a collision, the seat belt systems require inspection of retractors and buckles as well as front seat belt buckle support assemblies (slide bar), shoulder belt height adjusters, child seat belt tether bracket assemblies, and their installing hardware. The installer must replace any seat belt assemblies, but a qualified technician can postpone new installation if the assembly remains undamaged and works correctly. Inspection of all seat belt assemblies which did not experience the collision needs to happen. The examination reveals the necessity of installing fresh seat belt assemblies when incorrect operation or damage occurs. When front air bags and seat belt pretensioners activate due to a collision, the vehicle must receive new driver and front passenger seat belt system components that include belt and retractor assembly and buckles and height adjusters. Inspection of seat belt attachment points should occur before installing a new assembly to check for damage or distortion of the metal structure, which needs to be remedied before reuse. Test the new seat belt functionality after the installation by performing the Functional Test to confirm normal operation.