52 14 385 Replacing Gas Cartridge For Active Head Restraint On Left Or Right Front Seat

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. 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 14 390 REMOVING AND INSTALLING OR REPLACING FRONT LEFT OR RIGHT HEAD RESTRAINTS (NORMAL/ELECTRIC) .
Remove rear panel on front seat backrest. See 52 14 198 REMOVING AND INSTALLING / REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL / ELECTRIC) .

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 springs (1) and (2).

Fig 2: Identifying Springs

G04742886

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove gas cartridge complete with holder (2).

Fig 3: Identifying Gas Cartridge With Holder

G04742887

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) on left and right.

Installation:

Insert screws (1) with Loctite.

Tightening torque. See SEATS - TIGHTENING TORQUES - ALPINA .

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

Remove gas cartridge (4).

Fig 4: Identifying Top Rail Off Bottom

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

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.

NOTE: The gas cartridge may be replaced up to 5 times.