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. 5-8.
E72 Vehicles must be imprinted on the left side cyl. 5-8.
N73
S54
S85 / S65
W10 / W11
N12 / N13 / N14 / N16 / N18 / W16
W17
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.