Mercedes-Benz
Mercedes-Benz OM 401
OM 400 Series
Mercedes-Benz OM 401 OM 400 Series diesel engine. First-generation OM 400 V-engine for heavy vocational and industrial applications.
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- Manufacturer files
- No datasheet
- Last updated
- 2026-08-04
- Package route
- diesel generator sets
- Maximum Mechanical Power
- 141 kW
- Cylinders
- V6
- Displacement
- 9.572 L
- Rated Speed
- 2,500 RPM
Mercedes-Benz OM 401 industrial power context
The Mercedes-Benz OM 401 is a high-speed industrial diesel engine rated at 141 kW mechanical output at 2,500 RPM. It is used in off-road equipment and can support engineered variable-speed power systems, but its maximum power is not a direct 50/60 Hz alternator rating. Verify the drivetrain, power electronics, cooling, and emissions installation with Volvo Penta before specifying a generator package.
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Technical Specifications
| Brand | Mercedes-Benz |
| Model | OM 401 |
| Series | OM 400 Series |
| Configuration | V6, turbocharged |
| Cylinders | 6 |
| Displacement | 9.572 L |
| Compression Ratio | 16.9:1 |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Euro Stage II |
| Country of Origin | Germany |
Frequently asked questions
What is the maximum power output of the Mercedes-Benz OM 401?
The Mercedes-Benz OM 401 has a maximum mechanical output of 141 kW at 2,500 rpm. This is a variable-speed off-road rating, not a fixed-speed generator-set rating.
What fuel does the Mercedes-Benz OM 401 use?
The Mercedes-Benz OM 401 is a diesel variable-speed industrial engine.
What is the displacement and cylinder configuration of the OM 401?
The Mercedes-Benz OM 401 is a V6 (6-cylinder) engine with a displacement of 9.572 L.
What emissions standard does the OM 401 meet?
The Mercedes-Benz OM 401 is certified to Euro Stage II emissions standards.
Is the OM 401 still in production?
No — the Mercedes-Benz OM 401 is discontinued. Its specifications and datasheets remain archived here for reference.