The 912E has the same chassis as the 911 and therefore handles much like the 911. But with less power and less weight behind the rear axle, the 912E is more forgiving and less prone to sudden oversteer than the 911. The E was the only 912 offered with a corrosion-resistant galvanized chassis, and is the most comfortable version of the 912. The interior is the same as the 911, though some pieces were extra cost options including two of the five gauges. 14-inch Fuchs alloy wheels was a popular option; "Cookie-Cutter" alloy wheels were also available (it was rare to see a 912E with the standard 15-inch steel wheels). Other options were electric sunroof, 923/02 anti-slip differential, electric antenna (located on the passenger side front fender), power door mirrors, power windows, headlight washers, H1 headlamps. Air conditioning was a popular dealer-installed option. As a stopgap, the 912E was the single instance of "planned obsolescence" in Porsche history. Only 2,092 were built, but this plus year-only status and the desirable qualities inherited from contemporary 911s have since made the 912E one of the more collectible four-cylinder Porsches.