The point of reviewing the underbody guard is to make the material, the physical vehicle, and the responsibility milestones line up. The closeout spot check should go back over the mounting holes, the heat dissipation, and the service access, and confirm that the corrected document has replaced the old file and reached every user. Where the guard blocks drainage or a service point, do not overwrite the earlier data; placing old and new records side by side shows where the problem came from. The full evidence scope for the underbody guard is in this vehicle-import FAQ. Close the guard installation checklist only after the supplementary documents are signed for.