The Chair guides the pins from the head restraint pins. To remove the extraneous sound, it is necessary to remove the head restraint from the seat of the Hyundai Sonata NF seat completely, and force the guide pins to the opposite side by force. After this, the head restraint shall be inserted back in the direction of each other. The curvature of the pins will be firmly seated in the mounting holes and, accordingly, the head restraint shall cease to knock.
