Engine Mercedes OM457LA

Engine Mercedes OM457LA

The 12-liter OM 457 engine series includes 3 powerful and economical engines – 315 kW (428 HP), 295 kW (401 HP) and 260 kW (354 HP) The OM457LA engine complies with the EURO emission class -five. It has an excellent balance of high power, fuel efficiency and motor life, reaching 1 million km.

Maximum torque is achieved at low revs, corresponding to low specific engine consumption, which results in high fuel efficiency. Electronically controlled injectors allow fuel to be injected at a higher pressure, which has a positive effect on the combustion efficiency.


Manufacturer Daimler Chrysler
Also called OM 457
Start of production 2003
Cylinder block alloy cast iron
Fuel system direct injection
Configuration inline
Number of cylinders 6
Piston stroke, mm 155
Cylinder bore, mm 128
Compression ratio 18.5
Displacement, cc 11967
Power output, hp 354/2000
Torque output, Nm / rpm 1600/1100

Fuel type diesel
Euro standards Euro 5
Weight, kg 1045 (dry)
Dimensions, mm
— length
— width
— height
Firing order  1-5-3-6-2-4
Max normal engine operating temperature, °C 100
Engine lifespan, km
— official information
1 000

Engine Mercedes OM457LAAll Mercedes-Benz Axor powertrains, thanks to BlueTec technology and the Telligent service system, comply with the strictest emission standards – including Euro 5. The Telligent engine management system with injection pressures up to 2300 bar ensures optimized fuel combustion.

Features of the Daimler OM-457LA motor:

  • outlet gas aftertreatment system – reduces emissions and improves fuel efficiency;
  • an electronic fuel delivery system that includes electronically controlled injectors that inject fuel at high pressure for more complete combustion. This system has a positive effect on economy and productivity;
  • Blue Tec fuel economy technology;
  • direct injection system with PLD fuel equipment;
  • turbocharged with intercooling.

Explanation of OM457LA marking

OM Heavy Fuel Oil (Diesel) ICE
457 Engine type: 6-cylinder in-line.
L Charge air cooling.
A outlet turbocharger.

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