For the 1973 model year, AMC strengthened bumpers able to withstand a impact in the front and a impact in the rear, without any damage to the engine, lights, and safety equipment according to new mandates by the U.S. National Highway Traffic Safety Administration (NHTSA). Optional was a Levi's interior trim package, which included spun nylon upholstery made to look like denim (fire safety regulations prohibited the use of real cotton denim). Details included removable map pockets, burnished copper denim rivets, and red Levi's logo tabs. Rear-seat legroom was increased. The X package received a new tape-striping pattern that kicked up over the Gremlin's rear-wheel flares.