Since most of the brake hardware was replaced or rebuilt and the fluid looked a bit old, a full flush was in order. I bought the Motive Pressure Bleeder for $50 from ECS Tuning. After doing the A4 I highly recommend this tool! It takes literally minutes to flush / bleed the brakes (assuming the wheels are already off).
- Motive Pressure Bleeder
- Catch can for the old fluid
- 1L of new Brake Fluid
- Turkey baster to remove old fluid from the reservoir
- 11mm wrench for the rear brakes
- 3/8" wrench for the front brakes
Brief description of the procedure:
1) Remove as much of the old brake fluid from the reservoir with the Turkey Baster as possible.
2) Fill the reservoir with new fluid. (alternatively, you can fill the Motive Bleeder with fluid. This requires more clean up)
3) Connect the Motive Bleeder the reservoir and build up some pressure (about 10psi works).
4) Connect the catch can to the Right Rear brake caliper bleeder and open it. Continue to let fluid flow out of the caliper until you see new fluid and the bubbles stop.
5) Repeat step 4) for the Left Rear, Right Front, and then Left Front
6) Start the car and pump the brakes with the pedal until it feels firm.
7) Repeat steps 4) and 5) to make sure there it no more air in the system.
8) Go for a drive and see how they feel.
I replaced my ABS Module and therefore had to cycle the pump with VAGCOM.
[03 - ABS Brakes]
[Basic Settings - 04]
This will trigger the ABS pump to turn on for about 10 seconds. You should hear the fairly loud pump clicking during this time.
Click the [Done, Go Back] button and you're all set.