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

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 14 198 REMOVING AND INSTALLING/REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL/ELECTRIC)  and/or 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

Courtesy of BMW OF NORTH AMERICA, INC.

Release springs (1) and (2).

Fig 2: Identifying Springs

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Release screws (1).

Remove gas cartridge complete with holder (2).

Fig 3: Identifying Screws & Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) on left and right.

Installation: 

Insert screws (1) with Loctite.

Tightening torque 52 10 18AZ.  See 52 10 FRONT SEATS

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

Remove gas cartridge (4).

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

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

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure after triggered active head restraint: 

• Push head restraint back into original position.
• Insert new gas cartridge.