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The introduction of the 628 CSi also meant that the carburated 630 CS was withdrawn from the model range, so from now on all 6 series models where fuel injected.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

  1. DME control unit
  2. High voltage distributor
  3. Ignition coil
  4. Temperature time switch
  5. Coolant temperature sensor
  6. Speed sensor (reference mark sensor)
  7. TDC position transmitter
  8. Spark plug
  9. Intake air filter
  10. Idle speed control valve
  11. Battery
  12. Flywheel
  13. Fuel tank
  14. Electronic fuelpump
  15. Fuel filter
  16. Fuel pressure regulator
  17. Air valve
  18. Cold start valve
  19. Air flow meter
  20. Fuel injector
  21. 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

 

Model Units Total for model Total all models
628 CSi 202 286 6729
628 CSi A 84
630 CS 166 249
630 CS A 83
633 CSi 277 1163
633 CSi A 452
633 CSi A RHD 434
633 CSi USA 487 975
633 CSi A USA 488
633 CSi A Japan 301 301
635 CSi 3030 3755
635 CSi A 319
635 CSi RHD 267
635 CSi A RHD 139

 

1978

1980