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

Necessary preliminary work: 

Sort supplied retainers (1) according to graphic.

(X) Embossed number on retainer (1)

(Y) Installation position in lock barrel

Fig 1: Identifying Retainers With Numerical Sequence
G08511364Courtesy 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 Spring And Barrel Version
G08511365Courtesy of BMW OF NORTH AMERICA, INC.

Insert retainer (1) with lowest embossed number (X) of first position (Y) in lock barrel (2) and engage audibly.

NOTE: Number of retainers (1) differs according to vehicle.
Fig 3: Identifying Retainer And Lock Barrel
G08511366Courtesy of BMW OF NORTH AMERICA, INC.

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

  1. OK
  2. not OK
    Fig 4: Checking Retainer Flush
    G08511367Courtesy 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 Retainer From Lock Cylinder Using Suitable Tool
G08511368Courtesy of BMW OF NORTH AMERICA, INC.