The 2.5-liter BMW M51 diesel engine was produced at the factory in Austria from 1991 to 2001 and was installed in popular models such as the E36 body style of the 3 Series and the E34 and E39 body styles of the 5 Series. This power unit was modernized in 1996 and received a new index, M51TU. The inline-6 engine lineup also includes: M21, M57, N57, and B57.
| Exact capacity | 2497 cm³ |
| Power system | swirl chamber |
| Engine power | 115 HP |
| Torque | 222 nm |
| Engine block | cast iron R6 |
| Block head | aluminum 12v |
| Cylinder diameter | 80 mm |
| Piston stroke. | 82.8 mm |
| Compression ratio | 22 |
| Engine features | there is no |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | MHI TD04-11G-5 |
| What oils to use | 6.5 liters 5W-40 |
| Fuel type | diesel |
| Environmental class | EURO 1/2 |
| Approximate life expectancy | 350 000 HP |
| Exact capacity | 2497 cm³ |
| Power system | swirl chamber |
| Engine power | 143 HP |
| Torque | 260 nm |
| Engine block | cast iron R6 |
| Block head | aluminum 12v |
| Cylinder diameter | 80 mm |
| Piston stroke. | 82.8 mm |
| Compression ratio | 22 |
| Engine features | intercooler |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | MHI TD04-11G-5 |
| What oils to use | 6.5 liters 5W-40 |
| Fuel type | diesel |
| Environmental class | EURO 1/2 |
| Approximate life expectancy | 300 000 HP |
| Exact capacity | 2497 cm³ |
| Power system | swirl chamber |
| Engine power | 115 HP |
| Torque | 230 nm |
| Engine block | cast iron R6 |
| Block head | aluminum 12v |
| Cylinder diameter | 80 mm |
| Piston stroke. | 82.8 mm |
| Compression ratio | 22 |
| Engine features | there is no |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | Garrett TB2514 |
| What oils to use | 7.0 liters 5W-40 |
| Fuel type | diesel |
| Environmental class | EURO 2/3 |
| Approximate life expectancy | 350 000 HP |
| Exact capacity | 2497 cm³ |
| Power system | swirl chamber |
| Engine power | 143 HP |
| Torque | 280 nm |
| Engine block | cast iron R6 |
| Block head | aluminum 12v |
| Cylinder diameter | 80 mm |
| Piston stroke. | 82.8 mm |
| Compression ratio | 22 |
| Engine features | intercooler |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | MHI TD04-13T-4 |
| What oils to use | 7.0 liters 5W-40 |
| Fuel type | diesel |
| Environmental class | EURO 2/3 |
| Approximate life expectancy | 300 000 HP |
| City | 11.3 litry |
| Route | 6.1 litry |
| Mixed | 8.0 litry |
The weight of the M51 engine according to the catalog is 210 kg. The engine number M51 is located at the junction of the block with the oil pan. The main problem of this diesel engine is the cracking of the cylinder head due to overheating. The timing chain often stretches, causing the phases of gas distribution to be thrown off. Cheap or old oil quickly affects the condition of the plunger pair of the fuel pump. Difficult cold start indicates a failure of the priming pump. Turbocharger often needs replacement after mileage of over 150,000 kilometers.
| 3-Series E36 | 1991 - 1999 |
| 5-Series E34 | 1991 - 1996 |
| 5-Series E39 | 1996 - 2000 |
| 7-Series E38 | 1996 - 2000 |
| Omega B (V94) | 1994 - 2001 |
| Range Rover 2 (P38A) | 1994 - 2002 |
The three-cylinder BMW B37 diesel engine with a displacement of 1.5 liters has been fitted since 2014 and installed in front-wheel drive models as B37C15 and rear-wheel drive models as B37D15. In Mini cars, this diesel engine is known by its own index, B37C15A. Currently, the inline 3 engine line only consists of one family of engines.
The 1.7-liter diesel engine BMW M41 or M41D17 was produced from 1994 to 2000 and installed only in one model: the E36 3 Series, but in all its numerous body versions. This power unit has 86% common parts with the popular 6-cylinder diesel M51. The lineup of four-cylinder engines also includes: M47, N47, and B47.
The BMW N47 diesel engine series, with a displacement of 1.6 or 2.0 liters, has been produced since 2007 and installed in all compact and mid-size models of the group, including Mini cars. For a period of time, these engines were also installed in many Toyota minivans and crossovers. The inline-four engine lineup also includes: - M41, - M47, and - B47.
The BMW B47 engine series, with a capacity of 2.0 liters and consisting of four cylinders, running on diesel fuel, has been produced since 2014. This engine is installed in front-wheel drive vehicles as B47C20, in rear-wheel drive vehicles as B47D20, and in Mini models as B47C20A. These engines come in two different generations, and their updated versions are called B47TU1. The R4 engine lineup also includes the following engines: M41, M47, and N47.
3.0-liter petrol engine Audi CGWB 3.0 TFSI was produced at the factory from 2010 to 2012 and installed in all-wheel drive versions of popular models A6 and A7 in the C7 body before the facelift. There was also a more powerful version of this engine with a different index CGWD. The EA837 line also includes engines: BDX, BDW, CAJA, CGWA, CREC, and AUK.
The 2.7-liter V6 Jaguar AJD diesel engine was produced by the company from 2003 to 2009 and installed in many well-known models of the British firm, such as XJ, XF, and S-Type. A similar power unit was used in Land Rover SUVs under the name 276DT. This engine is a variant of the 2.7 HDi diesel engine.