E30 series BMW 3

since 1983-1994 of release

Repair and car operation

- 1. Maintenance instruction
   1.1.2. Overall dimensions
   1.1.3. Place of the driver
   1.1.4. Dashboard
   1.1.5. Keys for the car equipped with an immobilizer
   1.1.6. Window regulators
   1.1.7. Safety cushions
   1.1.8. Board computer
   1.1.9. Indexes
   1.1.10. Voltmeter
   1.1.11. Tachometer
   1.1.12. Counter of the total passable way
   1.1.13. Sound signal
   1.1.14. 3-step automatic transmission
   1.1.15. 4-step automatic transmission
   1.1.16. Mechanical transmission
   1.1.17. Hand brake
   1.1.18. Period of a running in of the car
   1.1.19. Fuel
   1.1.20. Threefold catalytic converter
   1.1.21. Engine oil
   1.1.22. Brakes
   1.1.23. Ruled cargo placements in a luggage carrier
   1.1.24. Start-up of the engine and driving
   1.1.25. Driving receptions
   1.1.26. Trailer towage
   1.1.27. Actions at refusal of start-up of the engine
   1.1.28. A start order from the additional battery
   1.1.29. If the engine decayed during movement
   1.1.30. Actions at an engine overheat
   1.1.31. Actions at a wheel puncture
   1.1.32. Ruled towings
   1.1.33. Pressure check in tires
   1.1.34. Check of a condition and replacement of tires
   1.1.35. Shift of wheels
   1.1.36. Installation of winter tires and chains
   1.1.37. Check of an external condition of the battery
   1.1.38. Battery charging
   1.1.39. Specifications
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


1.1.22. Brakes


Brake system with the main cylinder of tandemny type

The car is equipped with double-circuit hydraulic system of brakes with the main cylinder of tandemny type. At refusal of one contour braking is carried out by means of other contour, but the way of braking thus increases and the effort which is necessary for putting to a brake pedal increases. The control lamp of refusal of brakes Besides, lights up.

Driving with one serviceable contour is forbidden. Immediately repair the refused hydraulic actuator.

Vacuum amplifier of brakes

It is intended for increase of effort to the piston of the main cylinder at the expense of depression created by the engine. If when driving the engine decays, brakes work from pressing a pedal. In the amplifier the vacuum which can suffice on 1–2 braking, but no more remains.


It is forbidden to press constantly a brake pedal at the decayed engine. By each pressing the depression reserve decreases.

Even at a total disappearance of depression of a brake keep working capacity, but the effort which is necessary for putting to a pedal thus increases and the brake way increases.

Anti-blocking system (together with a control lamp)

The anti-blocking system is intended for a rastormazhivaniye of wheels at sharp braking or when braking on a slippery paving, increasing controllability the car in so critical situation.

The system starts to work at achievement of speed of the car of 10 km/h. At speed less than 5 km/h the anti-blocking system ceases to operate.

At once after engine start-up, or after a start of motion, from a motor compartment clicks which mean the beginning of a mode of self-examination of anti-blocking system reach, but do not point to malfunction.

At work of anti-blocking system pulsations of a pedal of a brake can be felt and be listened noise. It is necessary to hold in this situation only a pedal, making a little bigger effort. It is forbidden to release and press a brake pedal. Pulsations of a pedal of a brake from anti-blocking system can indicate a dangerous condition of a paving. In spite of the fact that according to the destination the anti-blocking system increases controllability the car, all the same it is necessary to be careful at movement so overall performance of this system depends on a number of objective factors.

Efficiency of braking depends on coupling of tires with a paving.

At turn commission at great speed, or sharp maneuver, the driver not always can manage to drive on certain pavings, even at serviceable anti-blocking system.

Avoid movement with a high speed on the wet road. The anti-blocking system cannot eliminate sliding on a film of water and loss of coupling with a covering.

Always observe a distance to ahead going transport. The brake way of the car equipped with anti-blocking system can exceed a brake way of the car without anti-blocking system in the following cases:

  – at movement on rough, covered with gravel or snow to the road;
  – at movement with the chains established on wheels;
  – at movement on the bumpy road, or on an inclined track.

Control lamp

The control lamp of anti-blocking system lights up at key turn in the situation On and later 3 seconds dies away.

Existence of one of specified below indications testifies to malfunction of those details which condition is supervised by a lamp. In this case it is necessary to hand over the car immediately in car-care center service:

  – the lamp does not light up (as is described above) or does not die away;
  – the lamp lights up at movement.

Even at faulty anti-blocking system of a brake will keep working capacity.

Indicators of wear of brake shoes

When wear of overlays of disk brakes will exceed norm, the noise published by the indicator of wear is distributed.

If at movement squeal or a howling sound is distributed, immediately address in car-care center service for check or replacement of brake shoes.

Avoid a long trip when the indicator publishes a sound.

Long driving with the brake shoes worn out to a limit will result in the accelerated wear of an expensive brake disk and to increase of effort to a pedal for preservation of a brake way.