34 41 280 Removing and installing actuator unit with control unit for parking brake (EMF)

WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks

Remove BOTH REAR WHEELS .

IMPORTANT: The following work must only be carried out with the ISID diagnosis system with software version 02.21 or later.

Delete fault memory.

Check function of actuator unit.

If actuator unit is defective, set diagnosis system to workshop mode.

Operating procedure:

Perform vehicle identification.
Carry out vehicle test.
Open menu item Actions.

Open Service Function.

Level 1:
Select menu item:

02 Chassis and Suspension
Level 2:
Select menu item:

Parking Brake
Level 3:
Select menu item:

Workshop Mode
- List of matches:
  Activate "AS 3440_L6_EMF" workshop mode file
- Procedure/Option:
  Select menu item:
  
  1 Set Workshop Mode
- Procedure:
  The message Workshop mode has been set is displayed

Open tailgate.

Fold back luggage compartment floor trim panel (1) as pictured.

Release plastic nuts (2).

Remove luggage compartment floor trim panel (1) in direction of arrow.

Fig 1: Removing Luggage Compartment Floor Trim Panel

Courtesy of BMW OF NORTH AMERICA, INC.

Cable for emergency release (1) must be removed with actuating unit.

Press both detent lugs together and press cable for emergency release (1) downwards.

Fig 2: Pressing Detent Lugs

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) and remove spring clip (2) on left and right.

Installation note:

Tightening torque 34 41 1AZ .

Fig 3: Identifying Spring Clip And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Disengage parking brake Bowden cable (1) from holder (2) on right and left.

Replace holder (2).

Fig 4: Identifying Parking Brake Bowden Cable And Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 5: Disengaging Parking Brake Bowden Cable From Holder

Courtesy of BMW OF NORTH AMERICA, INC.

F01/F02/F03/F04 only

Turn brake disc into position as illustrated (arrow).

Position screwdriver (1) on brake shoe expander (2) as illustrated.

NOTE: For greater clarity, illustration does not show brake disc.

Pull up parking brake cable behind hub carrier towards brake shoe expander (2) as far as it will go and hold in position.

At the same time, use a standard screwdriver (3) to press nipple (1) in brake shoe expander (2) downwards as far as possible.

Fig 6: Pressing Brake Shoe Expander Nipple Using Screwdriver

Courtesy of BMW OF NORTH AMERICA, INC.

Screwdriver: shank length 40 mm, blade width 4 mm

Pull handbrake cable out of wheel carrier.

NOTE: Bowden cable must not be pulled out before the nipple (1) is pushed down.

Fig 7: Disengaging Parking Brake Bowden Cable From Nipple

Courtesy of BMW OF NORTH AMERICA, INC.

F07 only

Turn brake disc into position as illustrated (arrow).

Position screwdriver (1) on brake shoe expander (2) as illustrated.

NOTE: For greater clarity, illustration does not show brake disc.

Pull up parking brake cable behind hub carrier towards brake shoe expander (2) as far as it will go and hold in position.

At the same time, use a standard screwdriver (3) to press nipple (1) in brake shoe expander (2) to the left as far as possible.

Fig 8: Pressing Brake Shoe Expander Nipple Using Screwdriver

Courtesy of BMW OF NORTH AMERICA, INC.

Screwdriver: shank length 40 mm, blade width 4 mm

Pull handbrake cable out of wheel carrier.

NOTE: Bowden cable must not be pulled out before the nipple (1) is pushed away.

Installation note:

Grease nipple of parking brake cable with fitting paste (part number 81 22 9 407 171).

Obtainable from BMW Parts Department.

Feed parking brake cable horizontally into brake anchor plate/brake guard plate. Sleeve must be inserted up to stop.

Nipple of handbrake cable must audibly snap into place in expander lock.

Disconnect plug connection (1).

Release screw (2).

Installation note:

Tightening torque 34 41 3AZ .

Disengage actuator unit (3) in direction of arrow and remove.

Fig 9: Disengaging Actuator Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles with HSR and Dynamic Drive:

RELEASE DYNAMIC DRIVE STABILISER on rear axle support (removal not necessary).

Slide holder with parking brake actuator unit (2) to the point where screws (1) can be released.

Installation note:

Tightening torque 34 41 4AZ .

Detach actuator unit from holder (2).

Fig 10: Identifying Parking Brake Actuator Unit And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not kink parking Bowden cable.

Feed through left parking Bowden cable (1) between left rear silencer and rear axle support.

Fig 11: Identifying Parking Bowdwen Cable

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, release bracket from left rear silencer and gently pull rear silencer downwards.

Feed out parking brake actuator unit (1) between left rear silencer and rear axle support.

Fig 12: Identifying Parking Brake Actuator Unit

Courtesy of BMW OF NORTH AMERICA, INC.

After installation

Carry out initial operation/function test in BMW diagnosis system.

Path
- Activities
- Service functions
- Chassis and suspension
- Parking brake
- Initial operation/function test

Replacement

Carry out programming/coding of control units
Carry out parking brake startup/functional check