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

WARNING: This page is about a different car, the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2007 BMW M5, and 2006 BMW M5. 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.

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 BATTERY NEGATIVE LEAD
Remove HEAD RESTRAINT
Remove REAR PANEL on front seat backrest

Disconnect plug connection on gas cartridge.

Detach retaining points (1).

Slide active head restraint carrier downwards.

Fig 1: Identifying Retaining Points

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Release spring clips (1) and (2).

Fig 2: Identifying Spring Clips

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Release screws (1).

Remove gas cartridge complete with holder (2).

Fig 3: Identifying Screws And Holder

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Release screws (1) on left and right.

Installation:

Insert screws (1) with Loctite.

Tightening torque: see 18AZ in 52 10 FRONT SEATS .

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

Remove gas cartridge (4).

Fig 4: Identifying Screws, Top/Bottom Rail And Gas Cartridge

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Installation:

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

Fig 5: Identifying Gas Cartridge And Guide Lug

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Procedure after triggered active head restraint:

Slide back head restraint into original position.
Insert new gas cartridge with spring clamps.

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.