Audi A3

Since 1997 of release

Repair and car operation

Audi A3
+ The maintenance instruction
+ Current leaving and service
+ The engine
+ Systems of cooling, heating
+ The power supply system and release of the fulfilled gases
+ Engine electric equipment
+ Manual box of a gear change
- 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
+ Electroschemes

Full drive


1 engine
2 – РКПП
3 – a drive/differential of a forward axis
4 – приводные shaft / a forward suspension bracket
5 – карданный a shaft
6 – coupling Haldex
7 – conic gear wheels of a drive of a back axis
8 – differential of a back axis
9 – power shafts


Arrows specify in a movement direction.

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

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

For possibility of placing of differential of a back axis all-wheel drive model AUDI A3 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 distribution of a twisting moment depending on traffic conditions, between forward and back axes, coupling Haldex fixed on differential of a back axis is applied.

Coupling Haldex represents disk coupling with electronic control and a hydraulic drive. Depending on the signals arriving from various gauges as, for example, from monitors the engine and ABS the monitor coupling Haldex regulates process of connection of a back axis. The control system of a full drive distinguishes the reason пробуксовывания separate wheels and various number of turns of wheels and according to it distributes a twisting moment between forward and back wheels. The back axis can be disconnected from a power drive that removes restrictions at towage with the lifted forward or back axes completely. The all-wheel drive model, besides, can be equipped by 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/hour. Otherwise towage should be made on the special conveyor by full loading.

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

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