1979 - Introduction of 628 CSi

This was the second year in a row for BMW to introduce a new model. In July 1979 a new low-end model called 628 CSi was presented to the public. Since it was a low-end model it had less standard equipment than the 633 and 635 models, but it shared the same body, chassi and interior.

The engine (2788cc) was taken from the 528i and produced 184bhp. This engine was capable of giving the 628 CSi a top speed of 130mph.

630 CS R.I.P.

The introduction of the 628 CSi also meant that the carburated 630 CS was withdrawn from the model range, so from now on all 6 series models where fuel injected.

The total production number for the 630 CS up to the end of production in July 1979 was 3972, this last year only 249 where made.

New engine electronics in 633 CSi

The 3210cc engine in the 633 CSi got the Digital Motor Electronics (DME) that later was to be used in all 6 series models.

DME - Digital Motor Electronics DME control unit High voltage distributor Ignition coil Temperature time switch Coolant temperature sensor Speed sensor (reference mark sensor) TDC position transmitter Spark plug Intake air filter Idle speed control valve Battery Flywheel Fuel tank Electronic fuelpump Fuel filter Fuel pressure regulator Air valve Cold start valve Air flow meter Fuel injector Ignition key

New option - ABS brakes

New, even if it was an option, was a microcomputer controlled Anti-Blockier-System (ABS) for the breaks.

Interior changes

In the cockpit there was only minor changes, for example a LED clock instead of the analogue clock that had been used earlier.

Production numbers for 1979