Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car

Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
- Brake system
   Check of brake mechanisms
   Brake fluid
   Check of level of brake fluid
   Check of tightness of brake system
   Replacement of brake fluid
   Disk brake mechanisms
   Measurement of thickness of blocks of the disk mechanism
   Control of a condition of brake disks
   Replacement of blocks of disk brake mechanisms
   Drum brake mechanism
   Measurement of brake shoes of the drum mechanism
   Check of the course of a pedal of a brake
   Disk brake mechanism of back wheels
   Measurement of thickness of blocks of back disk brakes
   Check of a free wheeling of the lever of the parking brake
   Main brake cylinder
   Amplifier of brakes
   Check of the amplifier of brakes
   Regulator of brake forces
   Repair of the hydraulic drive of brakes
   Pumping of brake system
   List of malfunctions
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications

Check of level of brake fluid

Tank with brake fluid (2):

1 – level marks, are lower connection for a control bulb;
3 – cover.

Continuous check


  1. About too low level of brake fluid in Audi 80 you though will be warned by the indicator on a control panel, but nevertheless it is impossible to refuse visual control:
  2. To open a cowl and if necessary to clear a rag a receiver of brake fluid.
  3. Level of brake fluid has to be in a transparent tank between marks of "min" and "max". In this case everything is all right.

Too low level of liquid?

If overlays of the disk brake mechanism wore out already a little, the level of liquid is most likely near the lower mark; if they new, most likely it is above. It is absolutely normal because the pistons of the disk brake mechanism acting at worn-out slips already a little are farther, leave in cylinders of supports the bigger volume which is filled with brake fluid.

The critical moment comes if the level of brake fluid in a tank falls below the minimum mark. As brake fluid does not evaporate and is not spent, it means that in system somewhere there is not tight place. Therefore it is necessary to look for urgently the reason and a place of a leakage, without waiting until the pedal of a brake goes to emptiness. It is simple to add liquids in a tank is a self-deception!