51 16 992 Disassembling and assembling lock barrel (lock barrel removed)

WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2017 BMW M6, 2017 BMW 650i xDrive, 2017 BMW 650i, 2017 BMW 640i xDrive, and 2017 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

If necessary, remove LOCK BARREL

Sort supplied retainers (1) according to graphic.

(X) Embossed number on retainer (1)

(Y) Installation position in lock barrel

Fig 1: Identifying Retainer Numbers And Installation Positions

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Insert spring (1) into first position of lock barrel (2).

NOTE: Lock barrel version (2) differs according to vehicle.

Fig 2: Identifying Spring And Lock Barrel

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Insert retainer (1) with lowest stamped number (X) in first position (Y) in lock barrel (2) so that it snaps into place audibly.

NOTE: Number of retainers (1) differs according to vehicle.

Refer to Fig 1 for retainer numbers/positions.

Fig 3: Inserting Retainer In Lock Barrel

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Insert ignition key (1) in lock barrel (3) and check whether retainer (2) is flush with housing.

OK
not OK

Fig 4: Checking Whether Retainer Is Flush With Housing
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If retainer (2) is not OK, press retainer (2) out of lock barrel (3) with a suitable tool (1).

Repeat work operations with retainer (2) with next higher number (X) until correct retainer (2) has been found.

Carry out all further positions in lock barrel as described in the process above.

Fig 5: Pressing Retainer Out Of Lock Barrel

Courtesy of BMW OF NORTH AMERICA, INC.