The 1966 model year saw a change to an egg-crate grille. The glass headlight covers lost the etched lines but gained twin 24k gold bands around the perimeter. The trunk lid bulge became more squared off with a smaller Imperial script off to the side. The back-up lights were moved to the lower bumper, nearly doubling taillight size. The Claro Walnut trim that had been introduced the previous year was used more extensively and would be replaced the following year. The engine that had been standard since 1959 was replaced with a engine.