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Home >> Audi >> 2017 >> A4 Prestige >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Hydraulic Brake Components [CYMC,DFVA,CWGD,DBPA,DECA] >> Hydraulic Components >> Hydraulic System >> Hydraulic System, Bleeding >> Hydraulic System, Bleeding Without Brake Charger/Bleeding Unit >> Bleeding Sequence

Bleeding Sequence

  1. Left Front Brake Caliper
  2. Right Front Brake Caliper
  3. Left Rear Brake Caliper
  4. Right Rear Brake Caliper

-- Build pressure up in brake system by pumping brake pedal.

NOTE:

Bleed the brake caliper at each bleed screw. If the brake caliper has two bleed screws, bleed the outer screw first.

-- Build pressure up in brake system by pumping brake pedal.

NOTE:

Press the brake pedal slowly to prevent bubbles from building up.

-- As soon as pressure is built up, hold the brake pedal in depressed position.

-- Open the bleeder screw with bleeder bottle hose connected, until the pressure is reduced (pedal drops).

-- Hold the pedal in the depressed position and close the bleeder screw.

-- Release brake pedal and wait approximately two seconds so that brake fluid can flow out of the brake fluid reservoir.

-- Repeat the procedure until the brake fluid flows out clear and without bubbles.

-- Tighten the bleeder screw, remove the bleeder hose and place the protective cap on the bleeder screw.

-- Repeat the bleeding procedure in the specified sequence for the remaining brake calipers.

-- Fill the brake fluid reservoir with brake fluid up to the "MAX" mark.

Fig 1: Brake Fluid Reservoir
GWWA47-10258Courtesy of AUDI OF AMERICA, LLC

-- Screw down the reservoir.

NOTE:

Do not add brake fluid above the "MAX" mark otherwise it will leak out of the reservoir.

-- Start the engine and check the brake pedal travel and pressure.

-- If the pedal travel is too long, check the brake system for leaks or repeat the bleeding procedure.

WARNING:

Risk of accident!

  • Make sure the brakes are working correctly before driving the vehicle for the first time.

Changing the Brake Fluid

Refer to Maintenance Intervals