Vehicle braking system Audi A6 C4
All models are equipped with a dual-circuit hydraulic brake system with vacuum boost. On most models, all brakes are disc, on some models rear drum brakes are installed. This section contains instructions for repairing the hydraulics of the brake system, brake mechanisms, handbrake and ABS system.
Technical characteristics of the brake system
Front brakes Type Disc, with single-piston sliding caliper Brake disc diameter 288 mm Disc thickness: - solid discs: • new 15 mm • wear limit 13 mm –...
Front brakes Type Disc, with single-piston sliding caliper Brake disc diameter 288 mm Disc thickness: - solid discs: • new 15 mm • wear limit 13 mm –...
Bleeding the hydraulic system
Warning: Brake fluid is poisonous. Some types of brake fluid are flammable. Brake fluid is hygroscopic. Any hydraulic system can only work effectively after...
Warning: Brake fluid is poisonous. Some types of brake fluid are flammable. Brake fluid is hygroscopic. Any hydraulic system can only work effectively after...
Hydraulic tubes and hoses
Warning: On models with ABS, disconnect the battery before starting work to prevent air from entering the ABS module. Replacement 1. To reduce brake fluid...
Warning: On models with ABS, disconnect the battery before starting work to prevent air from entering the ABS module. Replacement 1. To reduce brake fluid...
Front brake linings
Warning: Always replace brake pads on both wheels at the same time. Replacement 1. Raise the car and place it on supports. Remove the front wheels. 2....
Warning: Always replace brake pads on both wheels at the same time. Replacement 1. Raise the car and place it on supports. Remove the front wheels. 2....
Rear wheel brake pads
Replacement 1. Remove the rear wheels. 2. Loosen the handbrake cable and remove the caliper pins. 3. Remove the caliper from the mounting bracket and remove...
Replacement 1. Remove the rear wheels. 2. Loosen the handbrake cable and remove the caliper pins. 3. Remove the caliper from the mounting bracket and remove...
Rear brake pads
Rear drum brake components 1. Wedge 2. Pusher 3. Front brake shoe 4. Spring 5. Upper return spring 6. Cap 7. Hand brake lever 8. Lower return spring 9. Wheel...
Rear drum brake components 1. Wedge 2. Pusher 3. Front brake shoe 4. Spring 5. Upper return spring 6. Cap 7. Hand brake lever 8. Lower return spring 9. Wheel...
Front wheel brake disc
Inspection 1. Remove the front wheel. Remove the brake pads if necessary. 2. Tighten a few wheel bolts to secure the brake disc. Rotate the disc and inspect...
Inspection 1. Remove the front wheel. Remove the brake pads if necessary. 2. Tighten a few wheel bolts to secure the brake disc. Rotate the disc and inspect...
Rear wheel brake disc
Inspection 1. Remove the rear wheel. Tighten a few wheel mounting bolts to secure the brake disc. 2. Check the disk status. See. subsection 10.8. Removal 1....
Inspection 1. Remove the rear wheel. Tighten a few wheel mounting bolts to secure the brake disc. 2. Check the disk status. See. subsection 10.8. Removal 1....
Rear brake drum
Removal 1. Remove the rear wheel. 2. Remove the cap from the center of the brake drum. 3. Remove the pin and retaining cap. 4. Unscrew the hub mounting nut,...
Removal 1. Remove the rear wheel. 2. Remove the cap from the center of the brake drum. 3. Remove the pin and retaining cap. 4. Unscrew the hub mounting nut,...
Front brake caliper
Warning: On models with ABS, disconnect the battery before starting work to prevent air from entering the ABS module. Removal 1. Remove the front wheels. 2. To...
Warning: On models with ABS, disconnect the battery before starting work to prevent air from entering the ABS module. Removal 1. Remove the front wheels. 2. To...
Rear brake caliper
Warning: On models with ABS, disconnect the battery before starting work to prevent air from entering the ABS module. Removal 1. Remove the rear wheel. 2....
Warning: On models with ABS, disconnect the battery before starting work to prevent air from entering the ABS module. Removal 1. Remove the rear wheel. 2....
Rear brake wheel cylinder
Removal 1. Remove the brake drum. 2. To reduce brake fluid loss, remove the brake fluid reservoir cap and seal the neck tightly with plastic wrap or clamp the...
Removal 1. Remove the brake drum. 2. To reduce brake fluid loss, remove the brake fluid reservoir cap and seal the neck tightly with plastic wrap or clamp the...
Master brake cylinder
Warning: On models with ABS, disconnect the battery before starting work to prevent air from entering the ABS module. Removal 1. Remove the brake fluid...
Warning: On models with ABS, disconnect the battery before starting work to prevent air from entering the ABS module. Removal 1. Remove the brake fluid...
Brake pedal
Removal 1. Remove the shelf under the instrument panel and the relay panel. 2. Disconnect the return spring from the pushrod. 3. Remove the clamp and take out...
Removal 1. Remove the shelf under the instrument panel and the relay panel. 2. Disconnect the return spring from the pushrod. 3. Remove the clamp and take out...
Vacuum booster
Examination 1. Press the brake pedal several times and start the engine. The pedal should drop slightly. Let the engine run for a few minutes and turn it off....
Examination 1. Press the brake pedal several times and start the engine. The pedal should drop slightly. Let the engine run for a few minutes and turn it off....
Vacuum valve of servo amplifier
Removal 1. The valve is installed in the vacuum hose and is not replaced separately. Disconnect the vacuum hose from the vacuum booster. 2. Remove the hose...
Removal 1. The valve is installed in the vacuum hose and is not replaced separately. Disconnect the vacuum hose from the vacuum booster. 2. Remove the hose...
Handbrake cable
Removal 1. Disconnect the cable from the balancer and remove the cable sheath from the mount. 2. Remove the cable sheath from the fasteners. Unscrew the...
Removal 1. Disconnect the cable from the balancer and remove the cable sheath from the mount. 2. Remove the cable sheath from the fasteners. Unscrew the...
Handbrake lever
Removal 1. Remove the rear section of the center console. 2. Remove the exhaust pipe heat shield. 3. Loosen the adjusting nut and remove the balancer. 4....
Removal 1. Remove the rear section of the center console. 2. Remove the exhaust pipe heat shield. 3. Loosen the adjusting nut and remove the balancer. 4....
Rear brake pressure control valve (before 1996)
Warning: On ABS models, disconnect the battery before starting work to prevent air from entering the ABS module. Examination Models not equipped with automatic...
Warning: On ABS models, disconnect the battery before starting work to prevent air from entering the ABS module. Examination Models not equipped with automatic...
Brake light switch
Removal 1. The switch is mounted on the brake pedal bracket. The brake light switch (1) is the upper switch on the bracket. The lower switch (2) is the cruise...
Removal 1. The switch is mounted on the brake pedal bracket. The brake light switch (1) is the upper switch on the bracket. The lower switch (2) is the cruise...
General description of the anti-lock braking system (ABS)
The anti-lock brake system (ABS) is controlled by an electronic control unit that monitors the status of all system components. If the electronic control unit...
The anti-lock brake system (ABS) is controlled by an electronic control unit that monitors the status of all system components. If the electronic control unit...
Elements of the ABS system
Hydraulic module Warning: On ABS models, disconnect the battery before starting work to prevent air from entering the ABS module. Removal 1. Disconnect the...
Hydraulic module Warning: On ABS models, disconnect the battery before starting work to prevent air from entering the ABS module. Removal 1. Disconnect the...
Vacuum pump (diesel and petrol engines with a capacity of 2.3 l)
4-cylinder engines Removal 1. The vacuum pump is mounted on the left side at the rear of the cylinder block. 2. Disconnect the vacuum hose from the pump. 3....
4-cylinder engines Removal 1. The vacuum pump is mounted on the left side at the rear of the cylinder block. 2. Disconnect the vacuum hose from the pump. 3....
This section is available on russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
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