Front head restraints can be removed for cleaning or repair.
To remove a head restraint:
Pull the restraint up as far as it will go. Then push the release button, and pull the restraint up and out.
To reinstall a head restraint:
Insert the legs back in place, then adjust the head restraint to an appropriate height while pressing the release button. Pull up on the restraint to make sure it is locked in position.
WARNING
Failure to reinstall, or correctly reinstall, the head restraints can result in severe injury during a crash.
Always replace the head restraints before driving.
Honda Civic Service Manual. Rear Seat-Back Removal and Installation - Split Fold Down type (4-door)
Removal
1.
Right Rear Seat-Back - Split Fold Down
1.
Remove the right rear seat-back (A).
2.
Center Pivot ...