52 17 385 Replacing gas cartridge for active head restraint on left or right front seat (up to 09/2007)

WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. 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 the ignition!

Necessary preliminary work

Disconnect BATTERY EARTH LEAD .
Remove HEAD RESTRAINT .
Remove REAR PANEL on front seat backrest.

Disconnect plug connection on gas cartridge.

Release attachment points (1).

Slide active head restraint carrier towards bottom.

Fig 1: Identifying Attachment Points

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Release spring clamps (1) and (2).

Fig 2: Identifying Spring Clamps

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Release screws (1).

Remove complete gas cartridge with holder (2).

Fig 3: Identifying Gas Cartridge With Holder And Screws

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Release screws (1) on left and right.

Installation note:

Insert screws (1) with Loctite.

Tightening torque 52 10 03AZ.

Move top rail (3) from bottom rail (2).

Remove gas cartridge (4).

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

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Installation note:

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

Fig 5: Identifying Gas Cartridge And Guide Lug

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Procedure after activated 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.
After this the backrest must be replaced.
Number of activations is stored in control unit.