On Road Engines
Engines widely used in heavy commercial vehicles such as trucks, trailers and buses, built to the standards defined by the German Daimler company.
- Engine families
- OM 457 · OM 355 · OM 364
Half a century of diesel, built to a Daimler-Benz licence.
Light, semi-heavy and heavy-duty engines out of Tabriz — the OM 355, OM 364 and OM 457 families — manufactured under IATF 16949 and run in one of Iran's reference diesel engine laboratories.
OM 457 Euro 5 EEV
The newest OM 457, at the highest emission level the company produces.
View product
Product
Join the IDEM team in Tabriz
See the open positions at the works and send your application and documents online.
OM 457 with the Euro 5 EEV emission standard
The new generation of 400 series engines in the OM 457 type, upgraded to Euro 5 EEV.
Read more
Project
Iran Khodro Diesel CEO reviews production and development plans at IDEM
A report on production status, development projects and productivity plans was presented at IDEM.
Read more
NewsJuly 13, 2026
- OM 355
- OM 364
- OM 457
- IATF 16949
Tabriz, Iran — since 1971
Slide 1 of 5
Industries We Power
Engineered Solutions for Every Industrial Sector
- Heavy Commercial Transport
- Buses & Minibuses
- Power Generation
- Drilling Rigs
- Agriculture & Combines
- Marine Applications
- Oil & Gas
- Irrigation Pumps & Compressors
- Engine Spare Parts
Our SOLUTIONS
Engineering Solutions to Power Your Industry
Providing the technical capacities and capabilities of IDEM to the business environment of the industry.
Off Road Engines
Engines widely used in non-road industries such as high-power generators, drilling rigs and combines, performing above expectation in harsh conditions.
- Engine families
- OM 457 · OM 355 · OM 364 · OM 314
Spare Parts
Standard spare parts guarantee the correct operation of the engine for a long time, supplied through trusted representatives throughout the country.
- Engine families
- OM 457 · OM 355 · OM 352 · OM 314
Industrial Services
Providing the technical capacities and capabilities of IDEM — the result of 50 years of experience in the automotive industry — to the business environment.
- Behind it
- 50 years in the automotive industry
Engine Test Laboratory
One of the best diesel engine quality control laboratories in the country, with an engine test cell and reference measuring equipment.
- Equipment
- Engine test cell · reference measurement
Engine Parts Export
Supply and export of engine spare parts under a grade A certificate from Daimler of Germany, to countries in the Middle East and Europe.
- Export markets
- Middle East · Europe
Technical data
The engine families, at a glance
Figures are read straight from the catalogue; a range is the real spread across that family’s variants.
| Family | Cylinders | Bore × stroke | Displacement | Power | Torque |
|---|---|---|---|---|---|
| OM 314 | 4 | 97 × 128 mm | 3780 cm³ | 62–81 kW | 235–350 N.m |
| OM 355 | 6 | 128 × 150 mm | 11581 cm³ | 166–210 kW | 820–1059 N.m |
| OM 364 | 4 | 97.5 × 133 mm | 3972 cm³ | 95–103 kW | 455–480 N.m |
| OM 457 | 6 | 128 × 155 mm | 11967 cm³ | 220–260 kW | 1250–1600 N.m |
- Cylinders
- 4
- Bore × stroke
- 97 × 128 mm
- Displacement
- 3780 cm³
- Power
- 62–81 kW
- Torque
- 235–350 N.m
- Cylinders
- 6
- Bore × stroke
- 128 × 150 mm
- Displacement
- 11581 cm³
- Power
- 166–210 kW
- Torque
- 820–1059 N.m
- Cylinders
- 4
- Bore × stroke
- 97.5 × 133 mm
- Displacement
- 3972 cm³
- Power
- 95–103 kW
- Torque
- 455–480 N.m
- Cylinders
- 6
- Bore × stroke
- 128 × 155 mm
- Displacement
- 11967 cm³
- Power
- 220–260 kW
- Torque
- 1250–1600 N.m
Bore, stroke and displacement are the geometry of the licensed Daimler-Benz design each family is built to. An empty cell means no figure is published — not a number worth guessing.
Engine anatomy
What an IDEM engine is made of
Eight assemblies do the work, from the cast block to the belt drive at the front. Pick one to see it on its own.
1
Cylinder block
The cast-iron backbone: six cylinder bores, the main bearing seats and the coolant and oil galleries in one casting.
2
Cylinder heads
Carry the valves, the valve train and the injectors, and close off the top of every cylinder.
3
Crankshaft and pistons
Six pistons on their connecting rods turn combustion pressure into rotation at a forged crankshaft.
4
Turbocharger
Exhaust gas spins the turbine, and the compressor on the same shaft forces more air into the cylinders.
5
Fuel injection
An electronically governed in-line injection pump meters fuel to the six injectors through steel high-pressure lines.
6
Flywheel and housing
Smooths the pulses between firing strokes and carries the ring gear the starter engages; the gearbox or generator mounts on the housing.
7
Front drive
The crankshaft pulley and vibration damper drive the water pump and the alternator through the belts.
8
Oil pan
The oil pan holds the oil, the filter cleans it and the cooler holds its temperature before it returns to the bearings.
Renders of the production engine, for orientation; details can differ between variants.
Choose the Best
What stands behind every IDEM engine.
01.Daimler Licence
IDEM was established in 1969 as a joint Iranian-German venture under licence from Daimler-Benz of Germany, and was put into operation in 1971. The engines are built to standards defined by Daimler, and the company holds a grade A supplier certificate from Daimler in Germany.
02.Nationwide Support
IDEM supplies standard spare parts through accredited representatives across the country. The same parts, under the Daimler grade A certificate, are exported to the Middle East and Europe — Germany in particular.
03.Engine Test Laboratory
One of the leading diesel engine quality-control laboratories in the country, with an engine test cell and reference measuring equipment. Production runs under the IATF 16949 quality system.
04.Euro 5 EEV
The 364, 314 and 355 types are produced at Euro 2, Euro 3, Euro 4 and Euro 5 EEV. New-generation OM 457 production at Euro 5 EEV, and the conversion of the fuel system to common rail, are on the company plan.
Engine Types
13
Years of Experience
55
Exports and international partnerships
IDEM is a respected name across the Middle East and beyond. Alongside supplying the domestic market, the company exports its engines and spare parts to a range of countries.
- GermanyHome of the technology
- Turkey
- United Arab Emirates
- Singapore
- Saudi Arabia
- Syria
- Iraq
- South Africa
- Sudan
That export record has made IDEM one of the exemplary exporters at provincial and national level.
Contact export salesOur Industrial Partners
Certifications
Audited management systems
For a tender these are documents, not decoration. Beyond these four certificates IDEM holds the EFQM crystal statue for organisational excellence and a consumers’ rights compliance certificate, and has been named a provincial and national exemplary exporter over the years.
IATF 16949
Automotive quality management system
ISO 9001
Quality management system
ISO 14001
Environmental management system
ISO 45001
Occupational health and safety management
Our Project
Explore Large-Scale Projects
IDEM 5 MW power plant
A 5 MW plant on the factory site supplying stable power to the production lines.
OM 457 with the Euro 5 EEV emission standard
The new generation of 400 series engines in the OM 457 type, upgraded to Euro 5 EEV.
Common rail fuel system conversion
Upgrading the OM 355 and OM 364 and converting their fuel system to common rail to cut fuel consumption.
Engine parts export to Europe and the Middle East
Supplying and exporting engine spare parts under a grade A certificate from Daimler, Germany.
FAQ’s
The questions buyers ask before they order
Licence, engine types, emission class and spare-part supply — answered from IDEM’s own documentation.
Our production complex was established in 1348 with the joint investment of Iran and Germany, licensee of Daimler Benz of Germany, and the products are built to the standards defined by Daimler.
300 series engines in the OM 314, OM 352, OM 355 and OM 364 types, and the new 400 series in the OM 457 type, in both on-road and industrial versions.
The 364, 314 and 355 types are produced with Euro 2, Euro 3, Euro 4 and Euro 5 EEV emission levels.
IDEM appoints trusted and reliable representatives throughout the country to supply standard spare parts to customers.
One Daimler design, four steps to Euro 5 EEV
IDEM has built engines under Daimler Benz licence since 1348 (1969), and has carried the same families forward one standard at a time.
Euro 4
Euro 5 EEV
The OM 355 is the only family to have taken all four steps.
Engine catalogueNews and media
Our latest news and notes
News
News
By IDEM Public Relations
Iran Khodro Diesel CEO reviews production and development plans at IDEM
News