The BMW 326 convertible was, in fact, a version of the respected open-top two-door sedan, but it contrasted with its brother BMW 327, which was faster, shorter and lighter.

In 1936, BMW dared to build its first four-door sedan, and it was also offered as a convertible, although at that time the German automaker already had plans for new open-top cars. The convertible version was based on the same chassis as the sedan, which was supposed to reduce the cost of production. But it was not a cheap car and, thanks to its quality and comfort, it sold well.

On the outside were flared large front fenders, and between them was another body for the engine compartment. A large long hood opened either backwards or through two side panels. An interesting feature was noticed on the windshield. It was divided into two parts, and the wipers were installed on top. Thanks to this system, the windshield opened from the bottom and leaned out.

The chassis was inspired by the Citroen Traction Avant with a torsion bar suspension at the rear and a hydraulic braking system, first used on a BMW car. The inline six-cylinder engine had an unusual design with an aluminum cylinder block and a cast-iron cylinder head. The double carburetor was an inverted system, and each fed three cylinders.