Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine identification
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
M57/M57TU/M57T2
M67/M67TU
N47/N47S/N47C/N47T/N57/N57S/N57T
M52/M52TU
M54
M56
N20/N26
N40/N45/N45T/N43
N42/N46/N46T
N51/N52/N52K/N52T/N53/N54/N55
N62/N62TU
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.
N73
S54
S85/S65
S55
W10/W11
W16
W17
W20
N12/N13/N14/N16/N18
B37/B38/B47/B48/B57/B58
Assemble engine.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.