The Saab Sonnet was produced between 1955-1957 and 1966-1974. It used components from the   Saab 93, 95 and 96 models. It was mainly intended for the lucrative American market and was rare in the domestic (Swedish) market. The first prototype (Sonnet I) was a 2-seater lightweight roadster with an open roof, which later evolved into the commercially distributed Sonnet II, V4 and Sonnet III models.

Sonnet III was produced from 1970-1974. The first models were powered by a 1.5-litre V4 engine and after 1970 the engine capacity was increased to 1.7 litres.  However, due to emissions, the engine output remained the same at 65 hp (48 kW). The Sonnet III was able to accelerate from 0 to 100 km/h in 13 s and to reach a speed of 165 km/h. In total, only 8368 units were produced due to the oil crisis.