
BMW M30B25
Even after brief overheating the cylinder head can warp.
The BMW 7 Series is a series of German luxury sedan cars produced by BMW AG since 1977. Since 2015, the 6th generation of models has been released. The latest generation machines are based on the OKL platform. The chassis of this modular platform is created using the carbon fiber reinforcement technology used in modern BMW i electric vehicles. About 50 thousand 7-series cars are produced annually, most of which are sold in the USA and China.

In 1980, a version appeared with the only turbo engine in the line – 745i. The volume of this engine was 3.2 liters, and the maximum power was 252 hp. But this is not the limit – for the South African market there was a special version of the 745i with a 286-horsepower naturally aspirated engine, however, only a little more than two hundred such cars were produced. In addition to the engine, the buyer had to choose a transmission – a three- or four-speed automatic or a four- or five-speed manual.

1987 was the date when an executive car for the first time combined comfort and enviable speed characteristics. We are talking about the appearance of a version of the 750i, in which a 300-horsepower V12 raged under the hood, and which accelerated to 100 km/h in just 6.6 seconds. This sedan was the first BMW to feature an electronic speed limiter at around 250 km/h.
In 1992, the model was restyled, giving the “thirty-second” two new V8 engines with volumes of 3 and 4 liters for the 730i and 740i versions, respectively.

The car looked much fresher and even more dynamic, and, by the way, it not only looked more dynamic, but also was. Comfort was also taken care of in the 7 series – many innovative electronic systems were introduced that made the work of power units, transmission and suspension more measured. Buyers were offered gasoline versions of the 728i, 730i, 735i, 740i and 750i with engines from 2.8 to 5.4 liters and power from 193 to 326 hp, as well as for the first time in the history of the 7-series diesel 725tds, 730d and 740d, whose engines produced 143, 193 and 245 hp, respectively.

In 2005, there was a restyling that brought changes not only to the interior and exterior, but also to the engine range. The same six-liter giant remained the top one, but almost all of its younger brothers were replaced with more technologically advanced engines.

The car was equipped with petrol and diesel engines 3.0, 4.4, 6.0. Drive – rear or full. The car is offered in both regular and extended versions. The gearbox is only an eight-speed automatic.

The cars are equipped with petrol and diesel turbo engines, all versions have an eight-speed automatic transmission. The drive can be rear or full. In 2019, the model was restyled.
The BMW 7-Series was offered with 34 engines since 1977 (28 petrol, 6 diesel). Displacement ranges from 2.0 to 6.6 liters, power output from 115 to 635 hp. All of them use a timing chain. 15 are turbocharged. The longest rated lifespan belongs to the BMW M30B30 (about 400,000 km).
| Engine | Years | Volume | Power | Fuel | Timing | Oil | Lifespan |
|---|---|---|---|---|---|---|---|
| BMW 7-Series E23 1977–1987 | |||||||
| BMW M30B30 | 1977–1979 | 3.0 L R6 | 184–197 hp | petrol | chain | 5.75 L | ~400,000 km |
| BMW M30B28 | 1977–1986 | 2.8 L R6 | 165–184 hp | petrol | chain | 5.5 L | |
| BMW M30B35LE | 1978–1982 | 3.5 L R6 | 218 hp | petrol | chain | 5.75 L | |
| BMW M30B25 | 1981–1986 | 2.5 L R6 | 145–150 hp | petrol | chain | 5.5 L | |
| BMW M30B35 / M30B34 | 1982–1987 | 3.4 L R6 | 185 hp | petrol | chain | 5.75 L | ~400,000 km |
| BMW 7-Series E32 1987–1994 | |||||||
| BMW M70B50 | 1987–1994 | 5.0 L V12 | petrol | chain | 7.5 L | ~340,000 km | |
| BMW M60B30 | 1992–1994 | 3.0 L V8 | 218 hp | petrol | chain | 7.5 L | ~300,000 km |
| BMW M60B40 | 1992–1994 | 4.0 L V8 | 286 hp | petrol | chain | 7.5 L | ~350,000 km |
| BMW 7-Series E38 1994–2001 | |||||||
| BMW M73B54 | 1994–2001 | 5.4 L V12 | 326 hp | petrol | chain | 8.5 L | ~350,000 km |
| BMW M52B28 / M52TUB28 | 1995–2001 | 2.8 L R6 | 193 hp | petrol | chain | 6.5 L | ~350,000 km |
| BMW M62B44 | 1996–2001 | 4.4 L V8 | 286 hp | petrol | chain | 7.5 L | ~330,000 km |
| BMW M62B35 | 1996–2001 | 3.5 L V8 | 235–245 hp | petrol | chain | 7.5 L | ~320,000 km |
| BMW M51D25 | 1996–2000 | 2.5 L R6 | 115–143 hp | diesel, turbo | chain | 6.5–7 L | ~350,000 km |
| BMW M57D30 | 1998–2001 | 2.9–3.0 L R6 | 184–286 hp | diesel, turbo | chain | 6.75–8 L | ~400,000 km |
| BMW M67D40 | 1999–2001 | 3.9 L V8 | 238–258 hp | diesel, turbo | chain | 8.75 L | ~350,000 km |
| BMW 7-Series E65 2001–2008 | |||||||
| BMW N62B44 | 2001–2005 | 4.4 L V8 | 320–333 hp | petrol | chain | 8 L | ~320,000 km |
| BMW N62B36 | 2001–2005 | 3.6 L V8 | 272 hp | petrol | chain | 8 L | ~300,000 km |
| BMW M54B30 | 2002–2005 | 3.0 L R6 | 231 hp | petrol | chain | 6.5 L | ~330,000 km |
| BMW N73B60 | 2002–2008 | 6.0 L V12 | 445 hp | petrol | chain | 8.5 L | ~320,000 km |
| BMW N62B48 | 2005–2008 | 4.8 L V8 | 360–367 hp | petrol | chain | 8 L | |
| BMW N62B40 | 2005–2008 | 4.0 L V8 | 306 hp | petrol | chain | 8 L | ~310,000 km |
| BMW N52B30 | 2005–2008 | 3.0 L R6 | 218–272 hp | petrol | chain | 6.5 L | ~275,000 km |
| BMW M67D44 | 2005–2008 | 4.4 L V8 | 299–329 hp | diesel, turbo | chain | 9.25 L | ~350,000 km |
| BMW 7-Series F01 2008–2015 | |||||||
| BMW N63B44 | 2008–2015 | 4.4 L V8 | 408–530 hp | petrol, turbo | chain | 8.5 L | ~250,000 km |
| BMW N54B30 | 2008–2012 | 3.0 L R6 | 306–340 hp | petrol, turbo | chain | 6.5 L | ~250,000 km |
| BMW N57D30 | 2008–2015 | 3.0 L R6 | 204–381 hp | diesel, turbo | chain | 6.5–7.2 L | ~300,000 km |
| BMW N74B60 | 2009–2015 | 6.0 L V12 | 544 hp | petrol, turbo | chain | 10.5 L | ~300,000 km |
| BMW N55B30 | 2012–2015 | 3.0 L R6 | 306–370 hp | petrol, turbo | chain | 6.5 L | ~300,000 km |
| BMW N63B40 | 2012–2015 | 4.0 L V8 | 408–449 hp | petrol, turbo | chain | 8.5 L | ~250,000 km |
| BMW 7-Series G11 2015–present | |||||||
| BMW B57D30 | 3.0 L R6 | 265–400 hp | diesel, turbo | chain | ~350,000 km | ||
| BMW B58B30 | 2015–2018 | 3.0 L R6 | 326–388 hp | petrol, turbo | chain | ~300,000 km | |
| BMW N74B66 | 2016–present | 6.6 L V12 | 570–632 hp | petrol, turbo | chain | 10.5 L | ~320,000 km |
| BMW B48B20 / B48A20 | 2019–present | 2.0 L R4 | 156–306 hp | petrol, turbo | chain | 5.25 L | ~250,000 km |
| BMW 7-Series G70 2022–2026 | |||||||
| BMW S68 | 2022–2026 | 4.4 L V8 | 489–635 hp | petrol, turbo | chain | 10.75 L | ~250,000 km |
BMW 7-Series E23 (1977–1987): BMW M30B30, BMW M30B28, BMW M30B35LE, BMW M30B25 and BMW M30B35 / M30B34; BMW 7-Series E32 (1987–1994): BMW M70B50, BMW M60B30 and BMW M60B40; BMW 7-Series E38 (1994–2001): BMW M73B54, BMW M52B28 / M52TUB28, BMW M62B44, BMW M62B35, BMW M51D25, BMW M57D30 and BMW M67D40; BMW 7-Series E65 (2001–2008): BMW N62B44, BMW N62B36, BMW M54B30, BMW N73B60, BMW N62B48, BMW N62B40, BMW N52B30 and BMW M67D44; BMW 7-Series F01 (2008–2015): BMW N63B44, BMW N54B30, BMW N57D30, BMW N74B60, BMW N55B30 and BMW N63B40; BMW 7-Series G11 (2015–present): BMW B57D30, BMW B58B30, BMW N74B66 and BMW B48B20 / B48A20; BMW 7-Series G70 (2022–2026): BMW S68.
By rated service life the most durable BMW 7-Series engines are: BMW M30B30 — about 400,000 km; BMW M30B35 / M30B34 — about 400,000 km; BMW M57D30 — about 400,000 km. Actual lifespan depends heavily on maintenance and oil change intervals.
Engine oil capacity with filter: BMW B48B20 / B48A20 — 5.25 L (0W-30, 0W-40, 5W-30, 5W-40); BMW M30B25 — 5.5 L (5W-30); BMW M30B28 — 5.5 L (5W-30); BMW M30B30 — 5.75 L (5W-30 / 5W-40 / 10W-40/ 15W-40); BMW M30B35 / M30B34 — 5.75 L (5W-30 / 5W-40 / 10W-40/ 15W-40); BMW M30B35LE — 5.75 L (5W-30); BMW M51D25 — 6.5–7 L (5W-40); BMW M52B28 / M52TUB28 — 6.5 L (5W-30); BMW M54B30 — 6.5 L (5W-30); BMW M57D30 — 6.75–8 L (5W-40); BMW M60B30 — 7.5 L (5W-30); BMW M60B40 — 7.5 L (5W-30); BMW M62B35 — 7.5 L (5W-30); BMW M62B44 — 7.5 L (5W-30); BMW M67D40 — 8.75 L (5W-30); BMW M67D44 — 9.25 L (5W-30); BMW M70B50 — 7.5 L (5W-40); BMW M73B54 — 8.5 L (5W-40); BMW N52B30 — 6.5 L (5W-30); BMW N54B30 — 6.5 L (5W-30); BMW N55B30 — 6.5 L (5W-30); BMW N57D30 — 6.5–7.2 L (5W-30); BMW N62B36 — 8 L (5W-30); BMW N62B40 — 8 L (5W-30); BMW N62B44 — 8 L (5W-30); BMW N62B48 — 8 L (5W-30); BMW N63B40 — 8.5 L (5W-30); BMW N63B44 — 8.5 L (5W-30); BMW N73B60 — 8.5 L (5W-40); BMW N74B60 — 10.5 L (5W-30); BMW N74B66 — 10.5 L (5W-30); BMW S68 — 10.75 L (0W-30).
Timing chain: BMW B48B20 / B48A20, BMW B57D30, BMW B58B30, BMW M30B25, BMW M30B28, BMW M30B30, BMW M30B35 / M30B34, BMW M30B35LE, BMW M51D25, BMW M52B28 / M52TUB28, BMW M54B30, BMW M57D30, BMW M60B30, BMW M60B40, BMW M62B35, BMW M62B44, BMW M67D40, BMW M67D44, BMW M70B50, BMW M73B54, BMW N52B30, BMW N54B30, BMW N55B30, BMW N57D30, BMW N62B36, BMW N62B40, BMW N62B44, BMW N62B48, BMW N63B40, BMW N63B44, BMW N73B60, BMW N74B60, BMW N74B66 and BMW S68.
Yes: BMW B57D30, BMW M51D25, BMW M57D30, BMW M67D40, BMW M67D44 and BMW N57D30.

Even after brief overheating the cylinder head can warp.

Even after brief overheating the cylinder head can warp.




First of all, you should know that the BMW 750 usually consumes about 25 liters per hundred.

The main problem with this diesel engine is cylinder head cracking due to overheating.



First of all, owners should not be embarrassed by fuel consumption of 20 liters per 100 km.




The intake manifold flaps here can suddenly come off and fall into the cylinders.

This motor is very reliable, but it is difficult to find a service station that will undertake its repair.


The main problems of the motor are associated with malfunctions of the Valvetronic and VANOS systems.

The main problems of the motor are associated with malfunctions of the Valvetronic and VANOS systems.

The main problems are associated with rapid coking due to the direct injection system.


This motor is very reliable, but it is difficult to find a service station that will undertake its repair.

The main problems of the motor are associated with malfunctions of the Valvetronic and VANOS systems.

The main problems of the engine are associated with the direct fuel injection system.

The service life of this diesel engine is highly dependent on the quality of the fuel and oil used.

This engine has so many problems it would take forever to list them all.

This unit does not tolerate non-original oil and instantly cokes.

The main problems of the motor are associated with rapid coking at idle.

The main problems of the motor are associated with rapid coking at idle.

First of all, this is an oil burner due to the wear of the valve stem seals and the occurrence of rings.

Compared to their predecessors, the B48 series engines are no longer so prone to oil consumption, however, closer to 100,000 km, valve…

The most famous problem of this diesel engine is the contamination of the intake manifold and its swirl flaps, which results in…

Most of the complaints on the specialized forums are related to a decrease in the coolant level. The exact cause is unknown,…

The engine is new and detailed failure statistics have not been collected yet.
