51 23... Adjusting/replacing bump stops

The illustrations are schematic representations and are to be applied to the relevant vehicle type.

Version 1: 

Following parts must not be damaged:

• (1) Bump stop
  Fig 1: Identifying Bump Stop

  Courtesy of BMW OF NORTH AMERICA, INC.

Adjust bump stop (1) to correct height by turning left or right.

Fig 2: Adjusting Bump Stop

Courtesy of BMW OF NORTH AMERICA, INC.

Version 2: 

Replace damaged bump stops

• (1) Bump stop with ejector
  Fig 3: Identifying Bump Stop With Ejector

  Courtesy of BMW OF NORTH AMERICA, INC.

Press ejector (1) into bump stop and, in this position, twist approx. 90° counterclockwise with a Phillips screwdriver.

This locks the ejectors (1) in the bump stops.

Adjust bump stop (2) to correct height by turning left or right.

Unlock the ejector (1) again after completing adjustment.

Fig 4: Identifying Bump Stop And Ejector

Courtesy of BMW OF NORTH AMERICA, INC.

Version 3: 

Replace damaged bump stops

• (1) Bump stop
  Fig 5: Identifying Bump Stop

  Courtesy of BMW OF NORTH AMERICA, INC.

Turn lock (1) 45° counterclockwise.

Pull bump stop (2) upwards.

Close lid slowly until it is at the same height as the side panel.

Open lid and turn lock (1) clockwise.

Installation: 

Press bump stop into panel and drive in expanding pins (3).

Fig 6: Turning Bump Stop Lock

Courtesy of BMW OF NORTH AMERICA, INC.

The graphics are schematic representations and are to be applied to the relevant vehicle type.

Prerequisite: Lid must be correctly adjusted.

Following parts must not be damaged:

• (1) Bump stop
• (2) Catches

Remove adjusting buffer by pressing latch mechanisms back.

Fig 1: Identifying Bump Stop And Catches

Courtesy of BMW OF NORTH AMERICA, INC.

Screw in adjusting buffer (1) to create distance to engine compartment lid.

Place a cone (2) of modeling or sealing compound on adjusting buffer.

Slowly close engine compartment lid.

Fig 2: Identifying Engine Compartment Lid Buffer And Cone

Courtesy of BMW OF NORTH AMERICA, INC.

Raise engine compartment lid.

Compressed cone (1) determines distance between adjusting buffer and engine compartment lid.

Fig 3: Identifying Engine Compartment Lid Cone

Courtesy of BMW OF NORTH AMERICA, INC.

Measure dimension a between compressed cone and edge (1) of adjusting buffer.

Fig 4: Identifying Compressed Cone And Adjusting Buffer Edge Dimension

Courtesy of BMW OF NORTH AMERICA, INC.

Adjust measured dimension a + 0.5 mm by unscrewing adjusting buffer (1).

Fig 5: Identifying Compressed Cone And Adjusting Buffer Edge Dimension

Courtesy of BMW OF NORTH AMERICA, INC.

The graphics are schematic representations and are to be applied to the relevant vehicle type.

Prerequisite: Lid must be correctly adjusted.

Version 1: 

Following parts must not be damaged:

• (1) Bump stop
  Fig 1: Identifying Bump Stop

  Courtesy of BMW OF NORTH AMERICA, INC.

Adjust stop pad (1) to correct height by turning left or right.

Fig 2: Adjusting Bump Stop

Courtesy of BMW OF NORTH AMERICA, INC.

Version 2: 

Replace damaged stop pads

• (1) Bump stop
  Fig 3: Identifying Bump Stop

  Courtesy of BMW OF NORTH AMERICA, INC.

Adjusting version 2:

Stop (1) 45° anticlockwise.

Pull stop pad (2) upwards.

Close lid slowly until it is at the same height as the side wall.

Open flap and turn stop (1) clockwise.

Installation note: 

Press stop pad into panel and drive in expanding pins (3).

Fig 4: Turning Bump Stop Lock

Courtesy of BMW OF NORTH AMERICA, INC.

Version 3: 

Lever out expanding rivets (1).

Remove stop pad (2).

Fig 5: Identifying Bump Stop Pad And Rivets

Courtesy of BMW OF NORTH AMERICA, INC.

Adjusting version 3:

Checking correct adjustment:

• Insert a strip of paper (normal writing paper) between stop pad and limit position on body.
• Close flap. Make sure that the paper strip remains between stop pad and limit position.
• The stop pad is correctly adjusted when the paper strip can be pulled out "with slight resistance".

Adjustment procedures: 

Fig 6: Adjusting Bump Stop

Courtesy of BMW OF NORTH AMERICA, INC.

Screw in stop pad until the paper strip can be easily pulled out.

Then unscrew stop pad until the paper strip cannot be pulled out any more.

Screw in stop pad until the paper strip can be pulled out with "slight" resistance.

Version 4: 

Lever out expanding rivets (1).

Remove stop pad (2).

Adjusting version 4:

Set stop pad to the correct height by turning to the left or right.

Fig 7: Adjusting Stop Pad

Courtesy of BMW OF NORTH AMERICA, INC.

Version 5: 

Release screws (1) and remove stop pad (2).

Adjusting version 5:

Set stop pad to the correct height by turning to the left or right.

Fig 8: Adjusting Stop Pad

Courtesy of BMW OF NORTH AMERICA, INC.