The E21 3 series was introduced in 1975. It replaced the 02 series. There were
three models available: 316, 318 and 320. All models had a four cylinder engine.
The 320 had double headlights and 109 HP. The 316 had 90 HP and the 318 98 HP.
At the end of 1975 a 320i came available. This model had mechanical fuel injection.
In 1977 the 320 and 320i where replaced by a new 320 with a six cylinder engine.
Also new was a 323i six cylinder with 143 HP. In 1977 Baur introduced their new
convertible based on the 3 series. In 1979 the 3 series received a small face lift.
The chrome mirrors where replaced by black plastic ones and all models received a
new dashboard. All six cylinders received a digital clock in the rev counter. In 1980
the 318i replaced the 318. It now had fuel injection and 105 HP. The 316 received
the 318 engine wich now had 90 HP. In 1981 the 315 was introduced. This model
had no chrome round the windows and only had 75 HP. At the end of 1982 a new
E30 3 series was introduced. This new model came available in 1983. This was also
the last year for most of the E21 3 series, only the 315 was available until 1984.