Ford Motor Company (Ford) is recalling certain 2018-2020 F-150 and 2019-2020 F-250, F-350, F-450, and F-550 Super Duty pickup trucks, and 2018-2019 Ford Explorer, 2019-2020 Expedition, and 2020 Escape vehicles equipped with driver and/or passenger’s manual front seat back recliner mechanisms. Also included are certain 2020 Ford Explorer and Lincoln Aviator vehicles equipped with rear outboard seats and manual seat back recliner mechanisms. The recliner mechanisms may be missing the third pawl required for seat back strength, resulting in a loose seat back. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 202, “Head Restraints” and 207, “Seating Systems.”