Leak Test
WARNING: This page is about a different car, the 2022 Audi S3, 2022 Audi RS 3, 2022 Audi A3 Quattro, and 2022 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
Special tools and workshop equipment required
- Brake Pressure Gauge :VAG1310A
- Brake Pedal Actuator :VAG1869/2 .
High Pressure Test:
- Brake system (brake master cylinder, brake hoses, brake lines and brake calipers) tested for function and leaks.
-- Remove the bleed screw at one of the front brake calipers. Connect the :VAG1310 A and bleed.
-- Insert the :VAG1869/2 between the brake pedal and driver seat. Apply pressure to the brake pedal until the pressure gauge indicates a pressure of 50 bar.
- The pressure must not drop more than 4 bar during the test period of 45 seconds.
- Replace the brake master cylinder if the pressure decrease is too high.
Low Pressure Testing:
-- Set the brake pedal actuator back far enough that the pressure gauge indicates 6 bar positive pressure.
- The pressure must not drop by more than 1 bar during a test period of 3 minutes.
- Replace the brake master cylinder if the pressure decrease is too high.