Audi S4

since 2000 release

Repair and operation of the car

Audi S4
+ Introduction
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
+ Cooling systems, heating and air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
- Brake system
   Removal of air from the brake system
   Removal and installation of front brake shoes
   Removal and installation of blocks of brake mechanisms of back wheels
   Check of thickness of a brake disk
   Removal and installation of a brake disk / support
   Adjustment of the parking brake
   Removal and installation of the switch of a stoplight
   Removal and installation of a brake hose
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Removal and installation of blocks of brake mechanisms of back wheels

By means of an illustration find out execution of the support established on your car.

Brake mechanisms of back wheels C38

1 — the Bolt, 35 Nanometers
Self-stopped, surely replace. At an otvorachivaniye and an inhaling it is necessary to hold the directing fingers from a provorachivaniye.
2 — Brake shoes. All 4 blocks of one axis are surely replaced
3 — the Bolt with a gear fillet, 75 Nanometers. Surely replace
4 — the Guide complete with the directing fingers and a protective cover. It is delivered as the spare part with lubricant.

In the presence of damages of protective covers establish a repair kit. Use the enclosed package of lubricant for lubricant of the directing fingers
5 — the Bolt with a gear fillet, 75 Nanometers. Surely replace
6 — the Brake disk. Both brake disks of one axis are surely replaced. For removal previously remove a support
7 — the support Case. For replacement of a brake shoe the hose is not disconnected

C38 support

There are various executions of back brakes. Therefore previously, by means of an illustration, find out what execution is applied on your car.


Lifting operation and installations of the car on supports is connected with danger! Therefore before carrying out operation study Poddomkrachivaniye's Section and towage.


  1. Lift and install the car on supports.
  1. Mark the direction of its rotation on the tire. Turn off bolts of fastening of a wheel. Lift and establish a forward part of the car on supports and remove a wheel.

Surely observe indications of the Section In case of emergency.

If brake shoes are established again, then they need to be marked at removal. Change by places of external and internal brake shoes, and also their shift with right on the left wheel is not allowed. Replace all brake shoes of forward wheels even if the limit of wear was reached by a brake shoe of one party.

  1. Turn out bolts of fastening of the case of a support. At the same time hold the directing fingers from a provorachivaniye.
  1. Remove the case of a support and take out brake shoes.


At the removed brake shoes do not press a brake pedal, otherwise the piston can be squeezed out from the case. In this case it is necessary to remove a support and the piston in a set and to take them to repare on HUNDRED.


  1. Press the piston into the case.

You do not press on the piston by means of ordinary adaptation or the handle of the hammer at all, at the same time the mechanism of adjustment of the parking brake can be damaged.

  1. For an otvorachivaniye install special AUDI-3272 adaptation so that its fillet adjoined to a support. Turn the handle to the left against the stop. Turn a spindle to the right and turn out the piston.
  1. If special adaptation is unavailable, then you zapilit appropriately metal level and insert it into both grooves of the piston. Turn the piston with effort in the opposite direction.

At turn of the piston brake fluid is squeezed out from the brake cylinder in the tank. You watch liquid level in the tank, if necessary, suck away it.

Apply a plastic bottle which is intended only for this purpose to suction of brake fluid. Do not apply for this purpose a bottle to drinking liquid! Brake fluid is poisonous and should not be sucked away by a mouth through a hose at all. Apply for this purpose a siphon. When replacing brake shoes the level of brake fluid in the tank should not exceed the marks MAX since liquid when heating extends. The following liquid gets on the main brake cylinder, destroys its covering and brings corrosion.

Apply to cleaning of brakes only alcohol. Clear the directing surface and a seat of blocks in the mine of the case a rag. Do not use for this purpose the tool with sharp edges at all.

  1. Establish brake shoes into place.
  1. Install the case of a support and fix it by the new self-stopped bolts the moment of 35 Nanometers.

In a repair kit there are self-stopped bolts which need to be established.

  1. Observing the direction of rotation, fix wheels. Lower the car on wheels and only after that tighten fastening bolts cross-wise the moment of 120 Nanometers.

Several times, standing strongly press a brake pedal so that to feel resistance. Thus brake shoes adjoin to a disk and hold the working position.

  1. Check brake fluid in the tank, if necessary, add liquid to the mark MAX.
  2. Carefully let's be earned extra to new brake shoes. For this purpose several times slow down the car from speed 80 to 40 km/h, slightly pressing a brake pedal. Between braking let's brakes be cooled.

After installation of its new brake shoe it is necessary to earn extra. For this purpose the first 200 km of a way do not apply sharp braking without need.

C43 support with automatic installation

There are back brakes various executions. Therefore previously establish by means of an illustration what execution has your car.

In the present section only differences in relation to a back brake of C38 are considered. All instructions on security measures remain.



  1. Record a brake disk one bolt of fastening of a wheel.
  1. Turn off bolts from the support case, using a wrench for deduction.
  1. Release the lever of the parking brake. Take out a lock washer (1) of a cable of the drive of a brake on the holder and disconnect a cable at a support.
  1. Remove the case of a support and tie him a wire to a suspension bracket so that the brake hose was not tense or damaged.
  1. Take out brake shoes.
  1. Remove the directing brackets.



  1. Screw the piston rotation clockwise by means of special adaptation 3272. Operation demands application of effort.
  1. Establish into place lock springs of blocks.
  1. Establish into place brake shoes. You watch that brake shoes sat on the basic surfaces.
  1. Install into place the case of a support and tighten new bolts of fastening the moment of 35 Nanometers.

Establish 4 self-stopped bolts which are available in a repair kit. You watch that the brake hose was not twisted.

  1. Connect a cable of the parking brake to a support and record a lock washer.
  1. Adjust the parking brake, address the Section Adjustment of the Parking Brake.