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Home >> BMW >> 2012 >> 740Li >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Equipment - Repair - F01/F02 >> Hood Latch, Locks >> 51 23... Adjusting/replacing bump stops >> Overview

51 23... Adjusting/replacing bump stops: Overview

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

Version 1: 

Following parts must not be damaged:

Fig 1: Identifying Bump Stop
G06885596Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Adjusting Bump Stop
G06885597Courtesy of BMW OF NORTH AMERICA, INC.

Version 2: 

Replace damaged bump stops:

Fig 3: Identifying Bump Stop With Ejector
G06885598Courtesy 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 Ejector And Bump Stop
G06885599Courtesy of BMW OF NORTH AMERICA, INC.

Version 3: 

Replace damaged bump stops:

Fig 5: Identifying Bump Stop
G06885600Courtesy 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 note: 

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

Fig 6: Turning Lock
G06885601Courtesy of BMW OF NORTH AMERICA, INC.


The illustrations 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:

Remove adjusting buffer by pressing catches back.

Fig 1: Identifying Bump Stop And Catches
G06885609Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Slowly close engine compartment lid.

Fig 2: Identifying Adjusting Buffer And Cone
G06885610Courtesy of BMW OF NORTH AMERICA, INC.

Raise engine compartment lid.

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

Fig 3: Identifying Cone
G06885611Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 4: Identifying Cone And Edge Dimension
G06885612Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 5: Identifying Adjusting Buffer Dimension
G06885613Courtesy of BMW OF NORTH AMERICA, INC.