Audi A3

since 1997 of release

Repair and car operation

Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
- Automatic transmission and models with a full drive
   Adjustment of a cable of the selector of switching of automatic transmission
   Removal and installation of automatic transmission
   Diagnostics of electric components and reading of codes of malfunctions
   Full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema


Full drive


3–drive/differential of a forward axis
4–driving in bulk/lobby suspension bracket
6–Haldex coupling
7–conic gear wheels of a drive of a back axis
8–differential of a back axis
9–power shafts


Shooters specify in the movement direction.

The all-wheel drive model of the AUDI A3 car is equipped with a constant full drive. The following elements are in addition necessary for a drive of back wheels:

Knot of selection of capacity from RKPP of a forward axis to provide movement transfer on the driveshaft which connects RKPP to back differential. From differential of a back axis movement through power shafts is transferred to back wheels.

For possibility of placement of differential of a back axis the all-wheel drive AUDI A3 model has the double cross-section lever of a back suspension bracket and a fuel tank, two-piece.

For alignment of various turns of forward and back axes at a full drive of the car and for torque distribution depending on traffic conditions, between forward and back axes, the coupling of Haldex fixed on differential of a back axis is applied.

Coupling of Haldex represents disk coupling with electronic control and a hydraulic drive. Depending on the signals arriving from various sensors as, for example, from monitors the engine and ABS the monitor coupling of Haldex regulates process of connection of a back axis. The control system of a full drive distinguishes the reason of a probuksovyvaniye of separate wheels and various number of turns of wheels and according to it distributes a torque between lobbies and back wheels. The back axis can be disconnected from a power drive that removes restrictions at towage with the lifted lobbies or back axes completely. The all-wheel drive model can be besides equipped with all electronic and hydraulic systems, as, for example, ABS, EDS, ASR, EBV and ESP.

Towage of cars with a full drive

Cars with a full drive can be towed on distance no more than 50 km with a speed no more than 50 km/h. Otherwise towage should be made on the special conveyor by complete loading.

At towage it is not necessary to start the engine. The general instructions on towage are provided in Introduction.