The Mercedes OM 601 diesel engine series, with a capacity ranging from 2.0 to 2.3 liters, was produced from 1983 to 2000 and installed in both passenger cars, such as the W201 and W202 models, as well as in commercial microbuses. In total, there were three naturally aspirated versions of this engine and one with turbocharging. The R4 series includes: OM615 OM604 OM611 OM640 OM646 OM651 OM668
| Exact capacity | 1997 cm³ |
| Power system | komora widłowa |
| Engine power | 72 - 75 HP |
| Torque | 123 - 130 nm |
| Engine block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 87 mm |
| Piston stroke. | 84 mm |
| Compression ratio | 22 |
| Engine features | there is no |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | there is no |
| What oils to use | 6.0 liters 5W-40 |
| Fuel type | diesel |
| Environmental class | EURO 0/1 |
| Approximate life expectancy | 450 000 HP |
| Exact capacity | 2197 cm³ |
| Power system | komora widłowa |
| Engine power | 73 HP |
| Torque | 130 nm |
| Engine block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 87 mm |
| Piston stroke. | 92.4 mm |
| Compression ratio | 22 |
| Engine features | there is no |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | there is no |
| What oils to use | 6.0 liters 5W-40 |
| Fuel type | diesel |
| Environmental class | EURO 0/1 |
| Approximate life expectancy | 475 000 HP |
| Exact capacity | 2299 cm³ |
| Power system | komora widłowa |
| Engine power | 79 - 82 HP |
| Torque | 152 - 157 nm |
| Engine block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 89 mm |
| Piston stroke. | 92.4 mm |
| Compression ratio | 22 |
| Engine features | there is no |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | there is no |
| What oils to use | 6.0 liters 5W-40 |
| Fuel type | diesel |
| Environmental class | EURO 0/1 |
| Approximate life expectancy | 500 000 HP |
| Exact capacity | 2299 cm³ |
| Power system | komora widłowa |
| Engine power | 98 HP |
| Torque | 230 nm |
| Engine block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 89 mm |
| Piston stroke. | 92.4 mm |
| Compression ratio | 22 |
| Engine features | there is no |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | tak |
| What oils to use | 6.0 liters 5W-40 |
| Fuel type | diesel |
| Environmental class | EURO 0/1 |
| Approximate life expectancy | 400 000 HP |
| City | 12.1 litry |
| Route | 6.8 litry |
| Mixed | 8.8 litry |
The weight of the OM601 engine according to the catalog is 175 kg. The OM601 engine number is located at the front, at the junction with the cylinder head. These diesel engines are highly reliable when using high-quality fuel and oil. Cheap lubricants quickly wear out the pump parts, as well as the hydraulic compensators. Contaminated coolant often leads to engine overheating and cylinder head gasket failure. The weak point in the fuel system is the centrifugal clutch of the injection advance angle. The timing chain lasts for 200-250 thousand km, but if it breaks, the cylinder head may crack.
| C-Class W201 | 1983 - 1993 |
| C-Class W202 | 1993 - 1995 |
| E-Class W124 | 1984 - 1995 |
| V-Class W 638 | 1996 - 1999 |
| TN/T1 VAN | 1988 - 1995 |
| Sprinter W901 | 1995 - 2000 |
The 2.0-liter diesel engine Mercedes OM 654 was introduced by the company only in 2016 and is characterized by an aluminum cylinder block with plasma-sprayed Nanoslide iron coating. There is a version of the transverse OM 654q layout as well as an updated modification OM 654M. The R4 series includes: OM616 OM601 OM604 OM611 OM640 OM646 OM651 OM668
The 1.7-liter engine of the Mercedes OM668 or Vaneo 1.7 CDI was produced from 1998 to 2005 and only installed in the first generation A-Class model or similar compact vaneo. For the diesel engine, there were two versions: standard DE 17 LA and reduced DE 17 LA red, without an intercooler. The R4 engines include: OM615 OM601 OM604 OM611 OM640 OM646 OM651 OM654
The 2.5-liter, 5-cylinder inline engine Mercedes OM 605 was produced from 1993 to 2001 and was installed in several popular models of the company, such as the W124, W202, W210. This powertrain was offered in a naturally aspirated version with 113 HP and a turbocharged version with 150 HP. The inline R5 engine lineup also includes diesel engines: OM617, OM602, OM612, and OM647.
The 3.2-liter inline 6-cylinder engine Mercedes OM613 was produced from 1999-2003 and installed only in two models: the E-Class (W210) and the S-Class (W220). This engine was available only in one version, the 320 CDI with a power of 197 HP and a torque of 470 Nm. The inline R6 engine family also includes diesel engines: OM603, OM606, OM648, and OM656.
The 2.7-liter Toyota 3RZ-FE engine was manufactured in Japan for pickup trucks and SUVs from 1994 to 2004. It is one of the largest four-cylinder engines in the model range, and its design was made more complex by the presence of two balance shafts in the crankcase. The RZ family also includes the following engines: 1RZ-E, 2RZ-E, and 2RZ-FE.
The 3.0-liter diesel engine Renault P9X or 3.0 dci was supplied by Isuzu from 2002 to 2010 and installed in the largest models of the company at that time, such as Espace and Vel Satis. This diesel engine is called Isuzu 6DE1 and is also known as Saab D308L, Opel Y30DT or Z30DT. Currently, there is only one engine in the P series engine lineup.