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Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 546 (Seats - Repair) >> 14 Front Seat, Normal, Electric >> 52 14 385 Replacing Gas Cartridge For Active Head Restraint On Left Or Right Front Seat

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

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WARNING: Read and comply with safety regulations for handling airbag modules and pyrotechnical belt tensioners.

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

Switch off ignition!

Necessary Preliminary Tasks: 

Disconnect plug connection on gas cartridge.

Detach retaining points (1).

Slide active head restraint carrier downwards.

Fig 1: Gas Cartridge Retaining Points
G03293543Courtesy of BMW OF NORTH AMERICA, INC.

Release springs (1) and (2).

Fig 2: Gas Cartridge Springs
G03293544Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove gas cartridge complete with holder (2).

Fig 3: Retaining Screws And Gas Cartridge Holder
G03293545Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) on left and right.

Installation: 

Insert screws (1) with Loctite.

Tightening torque, refer to 52 10 18AZ in SEATS - TIGHTENING TORQUES .

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

Remove gas cartridge (4).

Fig 4: Screws, Top Rail, Bottom Rail And Gas Cartridge
G03293546Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

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

Fig 5: Gas Cartridge And Guide Lug
G03293547Courtesy of BMW OF NORTH AMERICA, INC.

Procedure After Triggered Active Head Restraint: 

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