52 13 886 Replacing gas cartridge for crash-active headrest on left or right (up to 06/2010)

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WARNING: Read and comply with safety regulations for handling airbag modules and pyrotechnical belt pretensioners, see 72 00... SAFETY REGULATIONS FOR HANDLING COMPONENTS WITH GAS GENERATORS .
Incorrect handling may result in triggering of the crash-active head restraint and thereby cause injury.

Switch off ignition!

Necessary preliminary tasks:

Adjust head restraint towards top to maximum extent.
Disconnect battery negative lead , see 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .

IMPORTANT: Renewal of pyrotechnics may be carried out up to 5 times. Triggering frequency is denoted on the sticker 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 in the event of a head restraint fault message and an untriggered pyroactivator.

Fig 1: Identifying Head Restraint Is In Crash Position

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Courtesy of BMW OF NORTH AMERICA, INC.

Removing cover: Raise cover (1) and pull rearwards.

Fig 2: Raising Cover

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Courtesy of BMW OF NORTH AMERICA, INC.

Removing pyrotechnics: Press together mounting (1) for pyrotechnics at tabs. Feed out pyrotechnics.

Fig 3: Pressing Retainer

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Courtesy of BMW OF NORTH AMERICA, INC.

Removing pyroactivator : Pull pyroactivator (2) out of mount (1) for pyrotechnics. Unlock plug connection (3) and disconnect.

IMPORTANT: Dispose of plastic element and pyroactivator.

Fig 4: Identifying Pyroactivator And Mounting With Plug Connection

G04957979

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure for installing pyrotechnics:

Bringing head restraint together - version without button (multifunction seat): Pull apart spring catches and push together head restraint. Maintain position.

Fig 5: Pulling Spring Catches Apart And Pushing Head Restraint

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Courtesy of BMW OF NORTH AMERICA, INC.

Bringing head restraint together - version with button (basic version): Press button (1) and push head restraint together. Maintain position.

Fig 6: Pressing Button

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Courtesy of BMW OF NORTH AMERICA, INC.

Locking release plate: Hold pushed-together head restraint in position and push release plate (1) upwards up to limit position. Release plate (1) must audibly snap into place.

Fig 7: Pushing Release Plate

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Courtesy of BMW OF NORTH AMERICA, INC.

Checking head restraint lock: Check end position of release plate (1). All four springs must be engaged (snapped into place).

Fig 8: Identifying Release Plate Position

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Courtesy of BMW OF NORTH AMERICA, INC.

Replacing pyrotechnics: Connect connector (1) to new pyroactivator (2) and lock. Clip pyroactivator (2) into new mount (3).

Fig 9: Identifying Plug, Pyroactivator And Mounting

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Courtesy of BMW OF NORTH AMERICA, INC.

Installing pyrotechnics: Press together mounting for pyrotechnics at tabs. Insert mounting for pyrotechnics into release plate and tilt in upward direction. Mounting for pyrotechnics must audibly snap into place.

Fig 10: Inserting Retainer For Pyrotechnical Device Into Release Plate And Tilt In Upward

G04957985

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check seating of retaining lugs in mounting.

Laying wiring harness: Secure wiring harness in support section with strain relief.

Fig 11: Identifying Wiring Harness In Carrier Section With Strain Relief

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Courtesy of BMW OF NORTH AMERICA, INC.

Mounting cover: Clip cover onto support section. Cover must audibly snap into place.

Fig 12: Clipping Cover Onto Carrier Section

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Courtesy of BMW OF NORTH AMERICA, INC.