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

WARNING: This page does not describe the selected car, but rather 50 other vehicles, including the 2016 BMW M5, 2016 BMW ActiveHybrid 5, 2016 BMW 550i xDrive, 2016 BMW 550i, and 2016 BMW 535i xDrive. 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: Retainers Stamped Numerical Sequence Chart
Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 2: Identifying Cylinder Position And Spring

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 3: Identifying Lock Barrel Retainer

Courtesy of BMW OF NORTH AMERICA, INC.

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

OK
not OK

Fig 4: Identifying Ignition Key, Lock Barrel And Retainer
Courtesy of BMW OF NORTH AMERICA, INC.

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 Lock Retainer Using Tool

Courtesy of BMW OF NORTH AMERICA, INC.