Remove the headliner board from the vehicle
Peel off the old fabric and scrape away all loose foam and adhesive
Clean the board thoroughly with a dry brush or vacuum
Measure and cut new headliner fabric with extra allowance
Apply high-temperature spray adhesive evenly to the board and fabric backing
Wait for the adhesive to become tacky
Press the fabric onto the board from the center outward
Smooth out wrinkles and bubbles as you go
Trim excess fabric around edges, openings, and cutouts
Reinstall the headliner board in the vehicle
Replace trim pieces, visors, handles, lights, and other removed parts
Use headliner repair pins or adhesive for small sagging areas if full replacement is not needed
Avoid using low-temperature glue or regular household adhesive
Keep the vehicle interior cool and dry to help prevent future sagging