BMW N53B25UL engine

N53 series engines were installed on cars from Bavaria Motors in 2005-2010. These power units have serious advantages over their predecessors. N53 has a serious competition in the engine market and have the advantages that are inherent in German engines: namely, reliability, life and maintainability. The first engine, which came out under the index N 53 was n53 BE30. It was released in 2004. On its basis, the motorists of Bavaria Motors produced N52 B30 engine, which replaced it

Engine specifications N53B25UL

Advantages

It is worth highlighting several significant features that distinguish the N52 from the N53. Motorists applied a direct fuel injection system. The innovative system that changed the valve lift height was replaced by a simpler and more straightforward one. The main solution that both mechanics and drivers were waiting for was the problem of ambiguous behavior of the powertrain at high speeds. The cylinder head and piston system was almost completely changed. Also, the old engine control system was replaced by a new version – Siemens MSD81.  Our modification differed from the basic version rather insignificantly. Removed this power unit of production in 2013. After that, they were replaced with new motors. But they – next time

Disadvantages

The first thing to look at is the high-pressure pump. It is very sensitive to fuel quality. If you change gas stations, it can quickly become clogged with debris and fail. Ignition coils are another vulnerable point of this power unit. Therefore, refuel only at a trusted gas station and use the recommended fuels and lubricants from the BMW manual.

There are no serious problems with the repair of these engines. Due to the fact that these are quite modern power units, the necessary parts can be found on sale. In order to repair this power unit you do not need to have additional tools for repair, as it was the case with the engine generation M30 and M41. But Bavaria Motors engineers did not specify the size for connecting rod mounting, which in 100% of cases requires replacement of the crankshaft, in case of a major overhaul of the entire unit. As for oil, the engine contains about 6.5 liters of grease. BMW motorists recommend using only synthetic oils. This allows to increase the service life of the power plant by 45%. As for practice, drivers also talk about the fastidiousness of the engine to the quality of oil.

Technical specifications

Let’s talk about the technical specifications. The exact volume of the engine is 2497 cubic centimeters. The maximum power that this powertrain can develop is equal to 190 horsepower. The exact value of the maximum torque is equal to 240 Newtons per meter at 5000 rpm. The maximum output of 190 horsepower, 140 kW, is developed by the engine at 6,100 rpm. These were high revving powerplants. In the technical documentation for the engine, the manufacturer recommends gasoline with an octane number of at least 95. The average fuel consumption in the city is about 9 liters for every 100 km of mileage, on the highway consumption is significantly reduced to 5.5 liters, which leads to average values in the mixed cycle of 7.9. According to the design of the engine – it is an in-line installation, has six cylinders. Of the innovations that have been applied, it is worth noting the digital system that controls the engine and has the name DME. Among the innovations should also be noted an advanced system for adjusting the gas distribution phases Double Vanos. Rounding out the technical updates is the electronic stuffing, which is responsible for controlling the operation of Valvetronic valves. The powertrain has 4 valves per cylinder and is not equipped with a supercharger. The powertrain also did not get a start-stop system. On mileage, from the factory is laid down about 350 thousand kilometers, but in practice these power units go up to 450 thousand.

Tuning

As for tuning, one chipovka will be quite enough.To the favorite of many types of tuning, which consists in boring cylinders here categorically does not apply. All to blame for the special design of cylinders, combustion chamber and cylinder head. But on these models is very popular swap engines. In practice, motorists most often install units from the N54 series. And this choice is based on the advantages of the motor of the next generation.

The powertrain is more modern and meets environmental requirements. But it is worth paying attention to the high cost of this pleasure. Together with the motor, it is necessary to replace or deeply modify the gearbox and gearbox. Tuning ateliers, in most cases, recommend installing a new engine control unit, but, as practice shows, you can do without downloading the firmware. As for the advantages of this powertrain, you should also notice the new piston system, the main cylinder block and the direct fuel injection system.

This engine is installed on the following models:

BMW 5-Series (E61)

BMW 5-Series (E60)