Punch engine numbers at marked surface with number punch.

Magnesium crankcase with sticker

M47/M47TU/M47T2

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

Courtesy of BMW OF NORTH AMERICA, INC.

M57/M57TU/M57T2

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

Courtesy of BMW OF NORTH AMERICA, INC.

M67/M67TU

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

Courtesy of BMW OF NORTH AMERICA, INC.

N47/N47S/N47C/N57 N57S

Fig 4: Identifying Engine Identification Number (N47/N47S/N47C/N57 N57S)

Courtesy of BMW OF NORTH AMERICA, INC.

M52/M52TU

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

Courtesy of BMW OF NORTH AMERICA, INC.

M54

Fig 6: Identifying Engine Identification Number (M54)

Courtesy of BMW OF NORTH AMERICA, INC.

M56

Fig 7: Identifying Engine Identification Number (M56)

Courtesy of BMW OF NORTH AMERICA, INC.

N40/N45/N45T/N43

Fig 8: Identifying Engine Identification Number (N40/N45/N45T/N43)

Courtesy of BMW OF NORTH AMERICA, INC.

N42/N46/N46T

Fig 9: Identifying Engine Identification Number (N42/N46/N46T)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 10: Identifying Engine Identification Number (N51/N52/N52K/N52T/N53/N54/N55)

Courtesy of BMW OF NORTH AMERICA, INC.

N62/N62TU

Fig 11: Identifying Engine Identification Number (N62/N62TU)

Courtesy of BMW OF NORTH AMERICA, INC.

N73

Fig 12: Identifying Engine Identification Number (N73)

Courtesy of BMW OF NORTH AMERICA, INC.

S54

Fig 13: Identifying Engine Identification Number (S54)

Courtesy of BMW OF NORTH AMERICA, INC.

S85/S65

Fig 14: Identifying Engine Identification Number (S85/S65)

Courtesy of BMW OF NORTH AMERICA, INC.

W10/W11

Fig 15: Identifying Engine Identification Number (N42/N46/N46T)

Courtesy of BMW OF NORTH AMERICA, INC.

N12/N14/N16/N18

Fig 16: Identifying Engine Identification Number (N12/N14/N16/N18)

Courtesy of BMW OF NORTH AMERICA, INC.

W17

Fig 17: Identifying Engine Identification Number (W17)

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