52 17 385 Replacing Gas Cartridge For Active Head Restraint On Left or Right Front Seat

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW 750i, 2008 BMW 750Li, 2007 BMW 750i, 2007 BMW 750Li, and 2006 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

Read and comply with safety regulations for handling airbag modules and pyrotechnical belt tensioners. See 72 SAFETY PRECAUTIONS AND GENERAL INFORMATION

Improper handling can lead to triggering of the pyrotechnical seat belt tensioner or side airbag, resulting in injuries.

Switch off ignition!

Necessary preliminary tasks:

Remove head restraint . See 52 17 390 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT HEAD RESTRAINT (COMFORT)
Remove rear panel on front seat backrest. See 52 17 205 REMOVING AND INSTALLING/REPLACING BOTH REAR PANELS ON LEFT OR RIGHT FRONT SEAT BACKREST (COMFORT)

Disconnect plug connection on gas cartridge.

Detach retaining points (1).

Slide active head restraint carrier downwards.

Fig 1: Identifying Retaining Points

G04742885

Courtesy of BMW OF NORTH AMERICA, INC.

Release spring clips (1) and (2).

Fig 2: Identifying Spring Clips

G04742886

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove gas cartridge complete with holder (2).

Fig 3: Identifying Holder & Screws

G04742887

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) on left and right.

Installation:

Insert screws (1) with Loctite.

Tightening torque 52 12 18AZ.

Slide top rail (3) off bottom rail (2).

Remove gas cartridge (4).

Fig 4: Identifying Top Rail, Bottom Rail & Gas Cartridge

G04742888

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Gas cartridge (1) is secured in holder by guide lug (2).

Fig 5: Identifying Gas Cartridge & Guide Lug

G04742889

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure after triggered active head restraint:

Push head restraint back into original position.
Insert new gas cartridge with spring clips.

NOTE:

The gas cartridge may be replaced up to 5 times.

Then the backrest must be replaced.

Number of triggerings are stored in the control unit.