Initially, the models 728, 730 and 733i, whose engines were developed for the previous model were offered.

From 1979, all engines with electronic fuel injection L-Jetronic Bosch equipped. The BMW 728i replaced the 728 and 730 models from. The 732i with digital engine electronics dissolved from the 733i. The new BMW 735i was in the car program. Also new was the BMW 725i. This was only for the authorities and offered for export. As a top model came in January 1980 the 745i with a 3.2-liter engine from the 732i, equipped with turbocharger and charge cooling equipment on the market. Thus, the performance of the 732i from 145 kW to 185 kW increased.

1983 there was a larger model of care measure. This was in addition to other changes in the vehicle model of the 745i the 735i engine with turbocharging are used. The engine power is not changed, however, the response and the torque increases.