Contents Wiring diagrams Section: Anti-Lock/traction Control All sections

Brake System: Overview Audi TT 8N facelift

Anti-Lock/traction Control 3 illustrations ~334 words

Scheme 1

Scheme 1: Application of PR Nos./brakes

The PR No. on the vehicle data sticker indicates the type of brakes installed in the vehicle.

  1. Arrow 1 - Rear brake
  2. Arrow 2 - Front brake

The vehicle data sticker is located in the spare wheel recess and in service booklet.

The PR No. can be used to identify the proper brake caliper/brake disc/brake pad combination.

EnginePR No.Front brake
1.8 ltr. - 110 kW 1.8 ltr. - 132 kW 1.8 ltr. - 165 kW1LTFN 3 (16")
1.8 ltr. - 132 kWG1A, 1LVFN 3 (16")
3.2 l - 184 kW1ZT2 FN 42 (17")
EnginePR No.Rear brake
Front-wheel drive
1.8 ltr. - 110 kW 1.8 ltr. - 132 kW1KKC 38
1.8 ltr. - 132 kW2EKC 38
All wheel drive
1.8 ltr. - 132 kW1KEC 41
1.8 ltr. - 165 kW1KFC 38
3.2 ltr. - 184 kW1KFC 38

General information

Brake fluid is hygroscopic, which means it absorbs moisture from the ambient air and must always be stored in air tight containers.

Scheme 2

Scheme 2: General information

An increase in the water content in the brake fluid causes its boiling point to drop. A reduced boiling point can cause vapor bubbles to develop as the fluid heats up under intense braking. In this condition the brake is likely to fail completely.

Brake fluid will take on a darker color after some time. This discoloration is the result of chemical reactions, and is NOT an indication of the fluid losing its properties. The effect appears after a relatively short time (few weeks), on vehicles installed with ABS even faster.

WARNINGAvoid any contact of rubber components of the brake system (sleeves, sealing rings) with mineral oil, oils, greases and cleaning solvents!

Even very small amounts of the above substances will transform structure and dimension of a sealing ring or sleeve enough to adversely affect brake function. The effects of a polluted brake system will not be noticed for several months until they have caused damage that requires extensive servicing, especially on vehicles installed with ABS.

Scheme 3

Scheme 3

A = Sleeve - original size

B = Sleeve - swollen as a result of contact with mineral oil

The above mentioned points require special rules for handling

Always keep containers holding brake fluid tightly shut. Only this will safely keep oil, dirt or detergents as well as moisture in the atmosphere from entering and polluting the brake fluid.

Take extra care to store containers holding brake fluid separate from containers holding oil (including hydraulic fluid) or liquid detergents. This will prevent any chance of accidentally mixing these fluids or even filling the brake system with the wrong fluid.