Vehicle braking system Audi 100 C4

Brake operation
When the driver presses the brake pedal, a push rod (plunger) connected to the pedal presses on two pistons located one behind the other in the master cylinder...

Brake check (constant monitoring)
First brake at very low speed. Using the tire tracks on the road, check that the length of the tracks on cars without ABS is the same, which indicates that the...

Front disc brakes
Checking brake linings The brake pad wear indicator lamp signals that the thickness of the remaining brake pad material needs to be measured. Brake pads should...

Repair of front brake calipers
Girling Brake Caliper Parts 1 Brake hose 2 Mounting bracket 3 Brake pipe, 5 Nm 4 Self-locking bolt, 30 Nm 5 Ribbed bolt, 125 Nm 6 Carrying support 7 Brake disc...

Removal and installation the front brake caliper
Both calipers are reinforced with so-called ribbed bolts. This bolt has a surface with small splines behind the hexagonal head, which holds the bolt in place...

Rear disc brakes
Checking the thickness of brake linings As a rule, a change in the thickness of the brake pads by 1 mm corresponds to a vehicle mileage of at least 1,000 km....

Brake disc treatment
Brake discs can be reground if necessary to make them ready for use again. You also need to pay attention to the flatness of the brake disc, i.e. when...

Rear drum brakes
Audi models with low-power engines are equipped with drum brakes on the rear wheels. On this version of the brakes, two brake shoes are pressed by pistons of...

Measuring drum brake shoes
Since the active pad wears out faster than the passive rear pad, only the thickness of the front brake pad is measured. Support the car from behind. On the...

Removal the brake drum
The brake drum can be removed after the wheel has been removed. Unscrew the wheel bolts. Support the car from behind. Turn the wheel rim or brake drum so that...

Main brake cylinder
All the cars of the described models are equipped with a dual-cavity master brake cylinder, equipped with a dual reservoir for brake fluid. So both circuits of...

Brake booster
The brake booster cannot be repaired. If damage is found, it must be replaced. A failure of the brake booster does not mean a loss of braking efficiency, it...

Removal air from the brake system («bleeding»)
Bleeding is necessary if the brake pipes have become disconnected at some point or if air has entered the system in some other way. The brake system must be...

Parking (hand) brake
Removal and installation the parking brake cable When removing the parking brake cable, there are differences between 2WD and 4WD (Quattro) vehicles. Support...

Anti-lock braking system (ABS)
Precautionary measures When working with the anti-lock braking system (ABS), the following precautions must be observed: Electrical circuits should be checked...

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100(C4, 1990-1994)

100(C4, 1990-1994, petrol)

100(C3, 1982-1990)

100(C3, 1982-1990, petrol)

100(C3, 1982-1990, diesel)