In 1974 the doors were revised and strengthened and the vent wings were eliminated due to the panel vents introduced in 1973, and the 164 became one of the earliest cars to offer heated seats. The instrument cluster changed slightly with the introduction of the bulb failure indicator and the fuel gauge received revised markings with the 1/2 mark moved to the centre of the gauge and the red reserve section shrinking significantly. Underneath, the floor pan was revised and the fuel tank was moved from the boot floor to closer to the rear axle for better protection in the case of an accident.