Audi A4, S4

Since 2000 of release

Repair and car operation

Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
+ The engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
- Brake system
   Removal of air from brake system
   Removal and installation of lobbies brake колодок
   Removal and installation колодок brake mechanisms of back wheels
   Check of a thickness of a brake disk
   Removal and installation of a brake disk/support
   Adjustment of a lay 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 колодок 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 С38

1 — the Bolt, 35Нм
Self-stopped, necessarily replace. At отворачивании and an inhaling it is necessary to keep directing fingers from проворачивания.
2 — Brake Pads. Are necessarily replaced all 4 Pads one axis
3 — the Bolt with a gear fillet, 75Нм. Necessarily replace
4 — Directing complete with directing fingers and a protective cover. It is delivered as the spare part with greasing.

In the presence of damages of protective covers establish the repair complete set. Use an applied package with greasing for greasing of directing fingers
5 — the Bolt with a gear fillet, 75Нм. Necessarily replace
6 — the Brake disk. Both brake disks of one axis are necessarily replaced. For removal preliminary remove a support
7 — the support Case. For replacement brake Pads the hose is not disconnected

Support С38

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


Operation of lifting and car installation on supports is connected with danger! Therefore before operation carrying out familiarise with Razdelom Poddomkrachivanie and towage.


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

Necessarily observe instructions Has undressed In case of emergency.

If brake Pads will be established again it is necessary to mark them at removal. Change by places external and internal brake колодок, and also their shift with right on the left wheel is not supposed. Replace all brake Pads forward wheels even if a deterioration limit has reached brake колодка one party.

  1. Turn out bolts of fastening of the case of a support. Thus keep directing fingers from проворачивания.
  1. Remove the case of a support and take out brake Pads.


At removed brake колодках 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 the complete set and to hand over them in repair on HUNDRED.


  1. Press the piston into the case.

At all do not press on the piston by means of the usual adaptation or the hammer handle, the mechanism of adjustment of a lay brake can be thus damaged.

  1. For отворачивания establish special adaptation AUDI-3272 so that its fillet adjoined to a support. Turn the handle to the left against the stop. A spindle turn to the right and turn out the piston.
  1. If the special adaptation available is not present, запилите in appropriate way a metal lath and insert it into both grooves of the piston. Turn the piston with effort in the opposite direction.

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

For отсасывания a brake liquid apply a plastic bottle which is intended only for this purpose. Do not apply for this purpose a bottle for a drinking liquid! The brake liquid is poisonous and should not be sucked away by a mouth through a hose at all. Apply for this purpose a siphon. At replacement brake колодок level of a brake liquid in the tank should not exceed mark MAX since the liquid at heating extends. The following liquid gets on the main brake cylinder, destroys its covering and results corrosion.

To clearing of brakes apply only spirit. Directing surface and a seat колодок in case mine clear a rag. At all do not apply for this purpose the tool with sharp edges.

  1. Establish brake Pads into place.
  1. Establish the case of a support and fix its new self-stopped bolts the moment 35Нм.

In the repair complete set there are self-stopped bolts which are necessary for establishing.

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

Some times, standing strongly press a brake pedal so that to feel resistance. Thus brake Pads adjoin to a disk and occupy the working position.

  1. Check up a brake liquid in the tank, if necessary, add a liquid to mark MAX.
  2. Cautiously allow to be earned extra new brake колодкам. For this purpose some times brake the car since speed 80 to 40 km/hour, slightly pressing a brake pedal. Between braking allow to brakes to be cooled.

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

Support С43 with automatic installation

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

In the present section differences in relation to back brake С38 are considered only. All instructions on security measures remain.



  1. Fix a brake disk one bolt of fastening of a wheel.
  1. Turn away bolts from the support case, using for deduction a wrench.
  1. Release the lever of a lay brake. Take out on the holder a lock washer (1) cables of a drive of a brake and disconnect a cable at a support.
  1. Remove the case of a support and adhere its wire to a suspension bracket so that the brake hose has not been tense or damaged.
  1. Take out brake Pads.
  1. Remove directing скобы.



  1. Screw the piston rotation clockwise by means of the special adaptation 3272. Operation demands the effort appendix.
  1. Establish into place lock springs колодок.
  1. Establish into place brake Pads. Watch that brake Pads sat on the basic surfaces.
  1. Establish into place the case of a support and tighten new bolts of fastening by the moment 35Нм.

Establish 4 self-stopped bolts which are available in the repair complete set. Watch that the brake hose was not braided.

  1. Connect a cable of a lay brake to a support and fix a lock washer.
  1. Adjust a lay brake, address to Section Adjustment of a lay brake.