Electromechanical parking brake actuator, removing and installing

Special tools, testers and auxiliary items required

Fig 1: Torque Wrench V.A.G 1331

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Torque wrench V.A.G 1331/

Fig 2: VAS 5051 Vehicle Diagnosis, Testing and Information System

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Vehicle Diagnosis, Testing and Information System VAS 5051

Removing

NOTE:

Ignition on
Release parking brake
Coding check and reported if necessary.
DTC memory interrogated, errors shown corrected and DTC memory erased.

Ignition off

Set vehicle to vehicle lift mode. → 43 - Self Leveling Suspension
Raise vehicle.
Remove wheels.

NOTE:

Ignition must be switched off for at least 30 seconds when disconnecting connector!
Clean entire area around connector and actuator/brake caliper.

Fig 3: Pressing Retainer On Top Side Of Connector (Vehicle Side) Down (Magnified Area) And Disconnect Actuator Connector

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Press retainer on top side of connector (vehicle side) down (magnified area) and disconnect actuator connector - arrow -.

Fig 4: Removing Connector (Actuator Side) From Bracket

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Remove connector (actuator side) from bracket.

Fig 5: Removing Both Actuator Securing Bolts

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Remove both actuator securing bolts (Torx TX25).

Fig 6: Removing Actuator

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Remove actuator - arrow -

Fig 7: Removing Sealing Ring With Suitable Tool

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Remove sealing ring with a suitable tool.

Ensure ring groove of seal and contact surface of parking brake actuator do not become damaged.

NOTE:

Do not use any tools with sharp edges.

Clean ring groove and contact surfaces if dirty. Only use brake cleaner

Installing

Install new seal

Fig 8: Positioning Actuator

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Pull brake caliper adjusting screw back a bit to make it easier to install actuator.

NOTE:

This makes it easier to install the actuator.

Fig 9: Actuator Postion

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Position actuator - arrow 1 - as shown

NOTE:

Ensure seal is seated correctly

Then rotate actuator - arrow 2 - so bolt hole - a - and threads in brake caliper housing - b - are brought into alignment.

Fig 10: Ensuring Parking Brake Actuator Is Seated Flush Against Brake Housing

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Ensure parking brake actuator is seated flush against brake housing.

Attach both actuator bolts (Torx TX25). Torque specification 12 Nm.

Position bolts by hand and screw in a few turns. If threads are damaged, entire brake caliper must be replaced!

Fig 11: Sliding Actuator Connector Into Bracket

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Slide actuator connector - arrow - into bracket.

NOTE:

Only insert connector by hand to avoid damaging it.

Connect connector (vehicle side).
Install wheels → 44 - Wheels, Tires and Wheel Alignment

After replacing actuator, basic setting 10 must be performed with vehicle diagnostic tester in EPB function.

Use Vehicle Diagnosis, Testing and Information System VAS 5051 for this.

Then select basic section 10 under "Function" → Connecting VAS 5051 and selecting functions or
Under chassis (Rep. Gr. 01:34-65)
Brake system (Rep. Gr. 01:45-46)
01- On Board Diagnostic (OBD) capable systems

53 - Parking brake
J540 - Electro-Mechanical Parking Brake Control Module
J540 - Basic setting (3 Electromechanical parking brake function test)