The range of Mercedes OM651 diesel engines with a capacity of 1.8 and 2.2 liters has been produced since 2008 and installed in many modern models of the German company, including commercial vehicles. This powertrain is available in a huge number of different versions and modifications. The R4 family includes: OM616 OM601 OM604 OM611 OM640 OM646 OM654 OM668
| Typ | row |
| Number of cylinders | 4 |
| number of valves | 16 |
| Exact capacity | 1796 cm³ |
| Cylinder diameter | 83 mm |
| Piston stroke. | 83 mm |
| Power system | Common Rail |
| Power | 109 HP |
| Torque | 250 nm |
| Compression ratio | 16.2 |
| Fuel type | diesel |
| Environmental class | EURO 5/6 |
| Typ | row |
| Number of cylinders | 4 |
| number of valves | 16 |
| Exact capacity | 1796 cm³ |
| Cylinder diameter | 83 mm |
| Piston stroke. | 83 mm |
| Power system | Common Rail |
| Power | 136 HP |
| Torque | 300 nm |
| Compression ratio | 16.2 |
| Fuel type | diesel |
| Environmental class | EURO 5/6 |
| Typ | row |
| Number of cylinders | 4 |
| number of valves | 16 |
| Exact capacity | 2143 cm³ |
| Cylinder diameter | 83 mm |
| Piston stroke. | 99 mm |
| Power system | Common Rail |
| Power | 95 - 143 HP |
| Torque | 250 - 360 nm |
| Compression ratio | 16.2 |
| Fuel type | diesel |
| Environmental class | EURO 5/6 |
| Typ | row |
| Number of cylinders | 4 |
| number of valves | 16 |
| Exact capacity | 2143 cm³ |
| Cylinder diameter | 83 mm |
| Piston stroke. | 99 mm |
| Power system | Common Rail |
| Power | 163 - 204 HP |
| Torque | 350 - 500 nm |
| Compression ratio | 16.2 |
| Fuel type | diesel |
| Environmental class | EURO 5/6 |
| City | 6.9 litry |
| Route | 4.4 litry |
| Mixed | 5.3 litry |
The weight of the OM651 engine according to the catalog is 203.8 kg. The engine number of the OM651 is located at the junction of the block and the oil pan. Fuel system: Until 2011, the main versions were equipped with a Delphi fuel system with piezo injectors, which were prone to leaks, often leading to hydraulic shocks and piston burnout. There was even a recall campaign for their replacement with simpler electromagnetic ones. Engine modifications with the Bosch fuel system have no reliability issues. Bearing rotation: Many owners of vehicles with this diesel engine have experienced bearing rotation. The cause of this is the thinning of overheated oil due to heat exchanger clogging or a drop in lubrication pressure due to variable-capacity oil pump failure. It is possible to insert a plug into the control valve of the pump, and it will work at maximum capacity. Timing belt failure: The combined timing drive consists of a roller chain and several gears. The chain can serve up to 300,000 km, but its hydraulic tensioner often fails much earlier, and replacing this tensioner is quite labor-intensive and expensive. Other breakdowns: This diesel engine also causes trouble with cracks in the plastic intake manifold, which attach to the cylinder head, as well as an everlasting oil cup leak through the gasket. Weak points of the engine also include the bi-turbo version's turbines and the plastic oil pan.
| A-Class W176 | 2012 - 2018 |
| B-Class W246 | 2011 - 2018 |
| C-Class W204 | 2008 - 2015 |
| C-Class W205 | 2014 - 2018 |
| CLA-Class C117 | 2013 - 2018 |
| CLS-Class C218 | 2011 - 2018 |
| SLK-Class R172 | 2012 - 2017 |
| E-Class W212 | 2009 - 2016 |
| S-Class W221 | 2011 - 2013 |
| S-Class W222 | 2014 - 2017 |
| GLA-Class X156 | 2013 - 2019 |
| GLK-Class X204 | 2009 - 2015 |
| GLC-Class X253 | 2015 - 2019 |
| M-Class W166 | 2011 - 2018 |
| V-Class W639 | 2010 - 2014 |
| V-Class W447 | 2014 - 2019 |
| Sprinter W906 | 2009 - 2018 |
| Sprinter W907 | 2018 - CE |
| Q30 1 (H15) | 2015 - 2019 |
| QX30 1 (H15) | 2016 - 2019 |
| Q50 1 (V37) | 2013 - 2020 |
| Q70 1 (Y51) | 2015 - 2018 |
2.0 and 2.2-liter Mercedes OM 615 diesel engine was produced from 1968 to 1986 and installed in passenger cars such as the W115 and W123 models, as well as in microbuses like the N1300 or MB100. This engine served as the basis for the entire series of popular power units in our market. The R4 family includes: OM616 OM601 OM604 OM611 OM640 OM646 OM651 OM668
The 2.2-liter diesel engine Mercedes OM 646 was produced from 2002 to 2010 and installed in the C-Class, CLK-Class, E-Class models, as well as in Vito and Sprinter minibuses. There was a version of this engine with a transverse arrangement, the OM 644, for the Chrysler PT Cruiser. The R4 engine lineup includes: OM616 OM601 OM604 OM611 OM640 OM651 OM654 OM668
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 4.5-liter V8 engine Nissan VK45DD was produced at the factory in Yokohama from 2001 to 2003 and was only installed in the fourth generation of the Cima model until the first facelift. In our country, this engine is often used for conversions in Infiniti cars. The VK family also includes the engines: VK45DE, VK50VE, VK56DE, and VK56VD.
The 2.9-liter gasoline engine Volkswagen ABV 2.9 VR6 was produced from 1991 to 1997 and installed in powerful versions of the third generation Golf, Corrado, and Passat wagon models. This powertrain was essentially an expanded version of the well-known engine designated AAA. The EA360 line also includes engines: AAA, AQP, and BUB.