BMW 7 Series: Replacing Gas Cartridge For Crash-Active Headrest On Left Or Right (UP TO 09/2010)

WARNING: Read and comply with SAFETY REGULATIONS for handling airbag modules and pyrotechnical belt tensioners.

Incorrect handling may result in activation of the crash-active head restraint and thereby cause injuries.

Switch off ignition!

Necessary preliminary work

• Clamp off BATTERY NEGATIVE LEAD
• Remove CRASH-ACTIVE HEADREST

IMPORTANT: The pyrotechnical device may be replaced up to 5 times.

Triggering frequency is denoted on the label on the head restraint carrier.

Labels are available as spare parts.

Starting situation

Head restraint is in the crash position after activation.

NOTE: Pyroactivator can only be removed in the triggered state.

The complete crash-active head restraint must be replaced if the event of a head restraint fault message and an untriggered pyroactivator.

Fig. 50: Identifying Crash-Active Head Restraint

Removing cover

Raise cover (1) and pull towards rear.

Fig. 51: Pulling Headrest Cover

Removing pyrotechnical device

Press together bracket (1) for pyrotechnical device at tabs.

Feed out pyrotechnical device.

Fig. 52: Pressing Bracket For Pyrotechnical Device At Tabs

Removing pyroactivator

Pull pyroactivator (2) out of mounting (1) for pyrotechnical device.

Unlock PLUG CONNECTION (3) and disconnect.

IMPORTANT: Dispose of plastic element and pyroactivator.

Fig. 53: Identifying Mounting Pyroactivator And Plug Connection

Procedure for installing pyrotechnical device:

Bringing head restraint together - version without button (MFS)

Pull spring catches apart and push head restraint together.

Maintain position.

Fig. 54: Pulling Spring Catches Apart And Push Head

Bringing head restraint together - version with button (Basic)

Press button (1) and push head restraint together.

Maintain position.

Fig. 55: Pressing Button And Push Head Restraint

Locking release plate

Hold pushed-together head restraint in position and push release plate (1) upwards up to stop.

Release plate (1) must audibly snap into place.

Fig. 56: Pushing Release Plate

Checking head restraint lock

Check end position of release plate (1).

All four springs must be engaged (snapped into place).

Fig. 57: Checking Head Restraint Lock

Replacing pyrotechnical device

Connect connector (1) to new pyroactivator (2) and LOCK.

Clip pyroactivator (2) into new mounting (3).

Fig. 58: Identifying Connector, Pyroactivator And Mounting

Installing pyrotechnical device

Press together bracket for pyrotechnical device at tabs.

Insert bracket for pyrotechnical device into release plate and tilt in upward direction.

Bracket for pyrotechnical device must audibly snap into place.

NOTE: Check seating of retaining lugs in bracket.

Fig. 59: Pressing Bracket For Pyrotechnical Device

Laying wiring harness

Secure wiring harness in carrier section with strain relief.

Fig. 60: Identifying Wiring Harness On Carrier

Mounting cover

Clip cover onto carrier section.

Cover must audibly snap into place.

Fig. 61: Mounting Cover Onto Carrier Section

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