Engine number at the marked surface.

Replacement drives are already assigned a number containing the identification and engine number at the factory.

The old drive number must be imprinted for replacement crankcases.

Magnesium crank cases feature a label, the engine number does not need to be embossed.

M47/M47TU/M47T2

Fig 1: Identifying Engine Identification Mark (M47/M47TU/M47T2)

Courtesy of BMW OF NORTH AMERICA, INC.

M57/M57TU/M57T2

Fig 2: Identifying Engine Identification Mark (M57/M57TU/M57T2)

Courtesy of BMW OF NORTH AMERICA, INC.

M67/M67TU

Fig 3: Identifying Engine Identification Mark (M67/M67TU)

Courtesy of BMW OF NORTH AMERICA, INC.

N47/N47S/N47C/N47T/N57/N57S/N57T

Fig 4: Identifying Engine Identification Mark (N47/N47S/N47C/N47T/N57/N57S/N57T)

Courtesy of BMW OF NORTH AMERICA, INC.

M52/M52TU

Fig 5: Identifying Engine Identification Mark (M52/M52TU)

Courtesy of BMW OF NORTH AMERICA, INC.

M54

Fig 6: Identifying Engine Identification Mark (M54)

Courtesy of BMW OF NORTH AMERICA, INC.

M56

Fig 7: Identifying Engine Identification Mark (M56)

Courtesy of BMW OF NORTH AMERICA, INC.

N20/N26

Fig 8: Identifying Engine Identification Mark (N20/N26)

Courtesy of BMW OF NORTH AMERICA, INC.

N40/N45/N45T/N43

Fig 9: Identifying Engine Identification Mark (N40/N45/N45T/N43)

Courtesy of BMW OF NORTH AMERICA, INC.

N42/N46/N46T

Fig 10: Identifying Engine Identification Mark (N42/N46/N46T)

Courtesy of BMW OF NORTH AMERICA, INC.

N51/N52/N52K/N52T/N53/N54/N55

Fig 11: Identifying Engine Identification Mark (N51/N52/N52K/N52T/N53/N54/N55)

Courtesy of BMW OF NORTH AMERICA, INC.

N62/N62TU

Fig 12: Identifying Engine Identification Mark (N62/N62TU)

Courtesy of BMW OF NORTH AMERICA, INC.

Position (1) engine number.

Position (2) engine code letters.

N63, N63TU.

S63

N74

S63T0 to engine number 2001 0052 on right side cyl. 1-4.

S63T0 from engine number 2001 0053 on left side cyl. 1 5-8.

E72 Vehicles must be imprinted on the left side cyl. 5-8.

N73

Fig 13: Identifying Engine Number And Engine Code Letters

Courtesy of BMW OF NORTH AMERICA, INC.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Engine identification

Use the Manual With the Right Hardware

When to See a Mechanic

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