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: Engine Identification Label (M47/M47TU/M47T2)

Courtesy of BMW OF NORTH AMERICA, INC.

M57/M57TU/M57T2

Fig 2: Engine Identification Label (M57/M57TU/M57T2)

Courtesy of BMW OF NORTH AMERICA, INC.

M67/M67TU

Fig 3: Engine Identification Label (M67/M67TU)

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Courtesy of BMW OF NORTH AMERICA, INC.

M52/M52TU

Fig 5: Engine Identification Label (M52/M52TU)

Courtesy of BMW OF NORTH AMERICA, INC.

M54

Fig 6: Engine Identification Label (M54)

Courtesy of BMW OF NORTH AMERICA, INC.

M56

Fig 7: Engine Identification Label (M56)

Courtesy of BMW OF NORTH AMERICA, INC.

N20/N26

Fig 8: Engine Identification Label (N20/N26)

Courtesy of BMW OF NORTH AMERICA, INC.

N40/N45/N45T/N43

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

Courtesy of BMW OF NORTH AMERICA, INC.

N42/N46/N46T

Fig 10: Engine Identification Label (N42/N46/N46T)

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Courtesy of BMW OF NORTH AMERICA, INC.

N62/N62TU

Fig 12: Engine Identification Label (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.l 5-8.

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

Fig 13: Identifying Engine Number And Codes

Courtesy of BMW OF NORTH AMERICA, INC.

N73

Fig 14: Identifying Engine Identification Mark (N73)

Courtesy of BMW OF NORTH AMERICA, INC.

S54

Fig 15: Engine Identification Label (S54)

Courtesy of BMW OF NORTH AMERICA, INC.

S85/S65

Fig 16: Engine Identification Label (S85/S65)

Courtesy of BMW OF NORTH AMERICA, INC.

S55

Fig 17: Engine Identification Label (S55)

Courtesy of BMW OF NORTH AMERICA, INC.

W10/W11

Fig 18: Engine Identification Label (W10/W11)

Courtesy of BMW OF NORTH AMERICA, INC.

W16

Fig 19: Engine Identification Label (W16)

Courtesy of BMW OF NORTH AMERICA, INC.

W17

Fig 20: Engine Identification Label (W17)

Courtesy of BMW OF NORTH AMERICA, INC.

W20

Fig 21: Engine Identification Label (W20)

Courtesy of BMW OF NORTH AMERICA, INC.

N12/N13/N14/N16/N18

Fig 22: Engine Identification Label (N12/N13/N14/N16/N18)

Courtesy of BMW OF NORTH AMERICA, INC.

B37/B38/B47/B48/B57/B58

Fig 23: Engine Identification Label (B37/B38/B47/B48/B57/B58)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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

Rather have a pro handle this?