ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING, VEHICLES WITH A GASOLINE ENGINE: Removing

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-- Insert the : VAG1869/2 between the brake pedal and driver seat. Press the brake pedal down at least 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:

Brake fluid is caustic risk of skin injury.

Do not extract brake fluid by mouth.

Brake fluid is poisonous and must never be swallowed.

Due to its corrosive nature, brake fluid must also never contact paint. Rinse off any leaking brake fluid immediately using plenty of water.

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

Fig 1: Identifying Protective Cap, Bleed Screw And Container Bleeder Hose

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

-- 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 left rear brake caliper.

NOTE:

Do not remove the : VAG1869/2 .

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

Vehicles with 2.5L TFSI Engine

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-- Drain the coolant. Refer to COOLANT, DRAINING AND FILLING .

-- Remove the air filter housing. Refer to the appropriate Service Information .

-- Press the release buttons on both sides and disconnect the hose -3- for the crankcase ventilation on the air duct pipe.

-- Remove the bolt -arrow-.

-- Loosen the hose clamp -1- and remove the air duct pipe.

NOTE:

Place a cloth under the heater core for the heater, to catch escaping coolant.

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-- Loosen the hose clamp -1- and remove the coolant hose.

-- Lift the clips -2-, remove the coolant hose from the heater core for the heater and move it to the side.

Equipment Versions with Heat Shield Version 1:

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-- Release the retainer in direction of -arrow-, pull the heat shield -1- off to the left side and remove it.

Equipment Versions with Heat Shield Version 2:

Fig 2: Heat Shield - Threaded Version

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-- Remove the nut -1-, and remove the bracket with the lock washer -3-.

-- Remove the heat shield -2-.

All:

-- Unclip the wiring guide.

-- Press the locking mechanism downward in direction of -arrow A-.

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

-- Remove the connector -1-.

NOTE:

Make sure that no brake fluid enters the control module connector housing. This could lead to contact corrosion 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 module.

Fig 3: Brake Lines, Attaching To Hydraulic Unit Sequence

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WARNING:

Do not damage the brake hose and brake line.
Do not bend the brake line past the specified form.
A damaged brake hose or a damaged or bent brake line must be replaced.

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

-- Remove the union bolts for the brake lines in the sequence -1 through 6- 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 .

-- Pull the hydraulic control unit -1- upward in direction of -arrow- and remove it.

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CAUTION:

Risk of destroying the hydraulic control module.

Do not remove the pump motor from the hydraulic control module.

-- Should the hydraulic control module be replaced, remove the bolts -arrows- and remove the mounting bracket -1-.

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