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Home >> Audi >> 2017 >> S3 Premium Plus >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Antilock Brake System -- (Sedan) >> 45 Antilock Brake System >> Control Module And Hydraulic Unit >> Abs Control Module -J104- /Abs Hydraulic Unit -N55-, Removing And Installing >> Abs Control Module -J104- And Abs Hydraulic Unit -N55-, Removing And Installing, Vehicles With Fwd >> Removing
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Abs Control Module -J104- And Abs Hydraulic Unit -N55-, Removing And Installing, Vehicles With Fwd: Removing

GWWA44-0020Courtesy of AUDI OF AMERICA, LLC

-- Insert the :VAG1869/2  between the brake pedal and driver seat. Press the brake pedal 60 mm.

NOTE:

By doing this, the valves in the brake master cylinder are closed and the brake fluid reservoir does not run empty.

WARNING:

Risk of skin irritation.

  • To prevent skin contact with brake fluid, wear chemical resistant protective gloves.

-- Remove the protective cap -3- from the bleeder screw -1- on the left front caliper.

GWWA46-10203Courtesy of AUDI OF AMERICA, LLC

-- Connect the bleeder bottle hose -2- as shown in the illustration.

-- Open the bleeder screw to reduce the pressure in the brake system.

-- Close the bleeder screw and remove the bleeder bottle.

-- Repeat the procedure on the rear left brake caliper.

NOTE:

Do not remove the :VAG1869/2  .

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING [For engine(s) CRUA, DEJA] or ENGINE COVER, REMOVING AND INSTALLING [For engine(s) CNSB, CNTC] .

-- If installed, release the retainer in direction of -arrow-, pull the cover -1- off to the left and remove it.

GWWA45-10236Courtesy of AUDI OF AMERICA, LLC

-- Remove the wiring guide.

-- Press the securing clip down in direction of -arrow A-.

GWWA45-10178Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector in direction of -arrow B-.

-- Remove the connector -1-.

NOTE:

Make sure that no brake fluid enters control module connector housing. This could lead to corrosion of the contacts and thereby cause the system to fail.

Clean a dirty connector housing thoroughly with compressed air.

-- To protect against escaping brake fluid, place enough lint-free cloths in the area below the hydraulic control unit.

GWWN45-10263Courtesy of AUDI OF AMERICA, LLC
CAUTION:

Danger of damaging the brake lines.

  • Do not change bend shape.

-- Mark the brake lines on the hydraulic control unit.

-- Remove the union bolts for the brake lines in the sequence -6 through 1- and push the brake lines slightly to the side.

-- Immediately seal the open connection points with clean plugs from the Assembly Part Set:5Q0 698 311  .

-- Remove the hydraulic control unit -1- upward in direction of -arrow-.

GWWN45-10247Courtesy of AUDI OF AMERICA, LLC

-- Place the hydraulic control unit at the bottom of the engine compartment and secure it from falling down.

-- Remove the noise insulation. Refer to NOISE INSULATION .

-- If installed, remove the bolts -arrows- and remove the drive axle heat shield.

GWWN34-11369Courtesy of AUDI OF AMERICA, LLC

Vehicles with Parking/Auxiliary Heater

-- Remove the front exhaust pipe. Refer to EXHAUST PIPES/MUFFLERS [For engine(s) CNSB, CNTC] or EXHAUST PIPES/MUFFLERS [For engine(s) CNSB, CNTC] .

Continuation for all Vehicles

GWWN45-10261Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows- and remove the bracket from the hydraulic control unit.

-- Turn the hydraulic control unit and guide it out downward.

CAUTION:

Risk of destroying the hydraulic control unit.

  • Do not remove the pump motor from the hydraulic control unit.