[3] The need to carry four people required a longer frame, a different rear suspension, and a larger engine.

A new perimeter frame was designed, using box section side members and straight tube crossmembers.

[3] The rear suspension was an independent semi trailing arm design; this was the first time BMW had used this system.

This engine, which delivered 19.5 hp (14.3 kW) at 4,500 revolutions per minute, was mounted behind the rear wheels.

[4][3] United States market cars are equipped with larger, sealed-beam headlights, and large bumper overriders.

BMW decided to produce two versions, the coupe, and a 2-door sedan with a taller, longer roof.