Audi A3

Since 1997 of release

Repair and car operation

Audi A3
+ The maintenance instruction
- Current leaving and service
   The routine maintenance schedule
   The general information on adjustment
   Check of levels of liquids, the control of leaks
   Check of a condition of tyres and pressure in them
   Replacement of impellent oil and the oil filter
   Check of a gear belt of drive ГРМ on presence of damages, deterioration measurement
   Check of brake system
   Check of fuel system
   Rotation and replacement of wheels. Chains противоскольжения
   Check of a condition and replacement of hoses of an impellent compartment, localisation of leaks
   Check of functioning of system of cooling
   Check of a condition of system of release of the fulfilled gases
   Visual check of tightness of a box of a gear change
   Check of a condition of components of a suspension bracket and steering
   Check of a condition of protective covers of power shafts
   Greasing of clamps of doors and the lock cylinder
   Condition check, adjustment and replacement of brushes of screen wipers
   The visual control of a seat belt and the block of a pillow of safety
   Check of a condition of the battery, care it and gymnastics
   Level check трансмиссионного oils РКПП
   Replacement of the filter of air of salon
   Replacement of a filtering element of the air filter
   Replacement of a brake liquid
   Check and replacement of spark plugs
   Replacement of the fuel filter of the diesel engine
   Check of level of a liquid of system of hydrostrengthening of a wheel
   Check of level of a liquid of the main transfer of automatic transmission
   Oil replacement in coupling Haldex of models with a full drive
   Condition check drivers ridge belts
   Level check трансмиссионной liquids АТ
+ 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
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electroschemes

Check of brake system


Bend a brake hose to reveal damages

By calliper measure a thickness Pads and a forward brake together with the metal basis. It should be not less than 7 mm

The thickness Pads and a back brake together with the metal basis should be not less than 7 mm


The dust formed as a result of deterioration of overlays and accumulating on components of the brake mechanism, can contain hazardous to health asbestos. Do not blow this dust by means of compressed air and do not inhale it! Do not use solvents on the basis of gasoline for dust removal. The dust should be washed off a special cleaner of brake system or methyl spirit in drain capacity. After rubbing of components of brake system by a damp rag this rag and contents of drain capacity should be held in the closed and signed container. Further whenever possible try to use components not containing asbestos.

Except checks through the established intervals of time a condition of brake mechanisms it is necessary to spend each time at removal of wheels or at occurrence of signs of malfunction in system. For driving safety the checks of brake system described below procedure are most important of all procedures made by you on car service.

Signs of malfunctions in brake system

1. Disk brake mechanisms can have the built in indicators of deterioration of frictional overlays which signal that deterioration of overlays has reached critical size. Thus overlays should be changed immediately, differently brake disks will be damaged also by it expensive repair is required.
2. Any of listed below signs can specify in potential defect of brake system:

a) At squeezing of a pedal of a brake the car "withdraws" in one party
b) Brake mechanisms at braking publish scraping or squealing sounds
c) the brake Pedal has an excessive course
d) the brake Pedal pulses (it normally only at system ABS work)
e) leaks of a brake liquid (usually on a tyre or wheel inside) Are observed.
3. In case of detection at least one of these signs immediately examine brake system.
Brake lines and hoses


In brake system basically steel brake tubes, except for the flexible reinforced hoses at forward wheels and as connections at the back bridge are used. Regular survey of all these lines is very important.

4. Park the car on an equal platform and switch off the engine. Remove caps from wheels. Loosen the, but do not remove bolts of fastening of all four wheels.
5. Поддомкратьте the car and reliably establish it on support.
6. Remove wheels.
7. Check up all brake lines and hoses on presence of cracks and attritions in their external covering, leaks, swellings and deformations. Check up brake hoses in forward and back parts of the car on presence of signs of a softening, cracks, deformations or deterioration as a result of a friction about other components. Check up all штуцерные connections on presence of signs of leaks and make sure of reliability of fastening of all bolts and clips of brake hoses.
8. Bend hands in one and other parties a brake hose to reveal damages. To braid hoses does not follow. Watch a direction of the colour line put on a hose!
9. Turn a steering wheel to the right and to the left against the stop. Hoses should not touch elements of a design of the car thus.
10. At detection of leaks of a liquid or their damages it is necessary to eliminate immediately.
Check of a thickness brake колодок


The thickness external brake колодок can be checked up through an aperture in a disk of a wheel by means of a pocket small lamp. Internal колодку it is possible to check up by means of a pocket small lamp and a mirror. If it is necessary to estimate more precisely a thickness Pads, it is necessary to remove a wheel and to measure колодку by a calliper.

Disk brake of a forward wheel


Experience shows that deterioration brake Pads wheels from outside the forward passenger more than from outside the driver. Therefore for check of a thickness brake Pads it is recommended to remove a wheel from outside the forward passenger.

11. Mark a paint position of a forward wheel in relation to a nave. It will allow to establish отбалансированное a wheel in the working position. Loosen the bolts of fastening of a wheel. Thus the car should stand on the earth. Lift a forward part of the car and establish on supports. Remove a forward wheel.
12. Measure by a calliper a thickness Pads and with a metal lining on internal and external brake колодках.
13. A limit of deterioration of a lobby Pads the thickness is considered of 7 mm (with a bearing plate). In this case brake колодку it is necessary to replace, address to subsection Replacement of lobbies brake колодок.
14. Establish a forward wheel so that the marks put at removal have coincided. Bolts of fastening of wheels are not greased. Establish bolts of fastening of a wheel. Lower the car on wheels and tighten bolts cross-wise the moment 120 H·м.


By experience, 1 mm of deterioration brake Pads corresponds at least 1000 km of run of the car. This rule corresponds to adverse service conditions of the car. In normal conditions deterioration колодок is much less. At a thickness Pads 10.0 mm колодка can be maintained still not less than 3000 km.

Disk brake of a back wheel
15. Check up a thickness external brake Pads through an aperture in a wheel disk, having taken advantage if necessary of a pocket small lamp. It is not necessary to remove a wheel disk. If there is a wheel cap, it is necessary for removing.
16. Internal колодку check up by means of a lamp and a mirror.
17. A limit of deterioration brake Pads back and forward wheels the thickness is considered of 7 mm, including a basis plate.
Lay brake
18. The elementary, and it is possible, the most obvious way of check of work of a lay brake is car installation on an abrupt slope with the cocked brake and transmission in neutral position (at check you should be in the car). If the lay brake does not keep the car from скатывания, it is necessary to make its adjustment.

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