Audi A4

since 1994 release

Repair and operation of the car

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
- Brakes
   Independent work on brake system
   So the brake system works
   Check of brakes
   Brake fluid
   Check of level of brake fluid
   Check of brake system on tightness and existence of damages
   Replacement of brake fluid
   Disk brakes
   Measurement of thickness of overlays of forward disk brakes
   Check of a condition of brake disks
   Replacement of overlays of disk brakes
   Back disk brakes
   Measurement of overlays of back disk brakes
   Emergency brake
   Check of idling of the lever of the emergency brake
   Main brake cylinder
   Brake amplifier
   Check of the brake amplifier
   Works on hydraulics of brake system
   Pumping of brake system
   The help at malfunctions
   ABS and EDS
   What does ABS?
   Function of separate knots
   Electronic system of distribution of brake effort (EBV)
   Violations in work of ABS system
   Electronic blocking of differential (EDS)
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

Check of level of brake fluid

Constant control


  1. In Audi A4 too low level of brake fluid is shown by also control bulb on a control panel, but nevertheless you should not refuse visual control:
  2. Open a cowl and wipe a tank with brake fluid a rag.
  3. Level of brake fluid has to be in a transparent broad tank between marks "min." and "max.". In this case everything is all right.

Too low level of brake fluid?

If overlays of disk brakes are already a little erased, the tendency to lowering of the level of liquid up to the lower mark is looked through; if they new, liquid level again exceeds the top mark. This absolutely normal phenomenon as at the erased slips the moved forward are a little farther pistons of a disk brake leave the bigger volume which is filled with brake fluid in cylinders of brake supports. The situation becomes critical when in a tank the level of brake fluid falls below a mark of "mines". As it does not evaporate and is not spent, that is a leakage place. Quickly find out the reason, the brake pedal did not refuse yet! Having added will be eyewash!