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
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.