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.

N20/N26

Fig 8: Identifying Engine Identification Number - N20/N26

Courtesy of BMW OF NORTH AMERICA, INC.

N40/N45/N45T/N43

Fig 9: Identifying Engine Identification Number - N40/N45/N45T/N43

Courtesy of BMW OF NORTH AMERICA, INC.

N42/N46/N46T

Fig 10: Identifying Engine Identification Number - N42/N46/N46T

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 11: Identifying Engine Identification Number - N51/N52/N52K/N52T/N53/N54/N55

Courtesy of BMW OF NORTH AMERICA, INC.

N62/N62TU

Fig 12: Identifying Engine Identification Number - N62/N62TU

Courtesy of BMW OF NORTH AMERICA, INC.

N73

Fig 13: Identifying Engine Identification Number - N73

Courtesy of BMW OF NORTH AMERICA, INC.

S54

Fig 14: Identifying Engine Identification Number - S54

Courtesy of BMW OF NORTH AMERICA, INC.

S85/S65

Fig 15: Identifying Engine Identification Number - S85/S65

Courtesy of BMW OF NORTH AMERICA, INC.

W10/W11

Fig 16: Identifying Engine Identification Number - W10/W11

Courtesy of BMW OF NORTH AMERICA, INC.

N12/N14/N16/N18

Fig 17: Identifying Engine Identification Number - N12/N14/N16/N18

Courtesy of BMW OF NORTH AMERICA, INC.

W17

Fig 18: 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

Rather have a pro handle this?