The Most Common BMW N20B20B 2.0 Engine Problems

The N20B20B engine have successfully replaced their predecessors in the general market. They usually have 4 cylinders and began production in 2011. They are used in many modern versions of cars from a well-known manufacturer.

The N20B20B engine received a turbocharged supercharging, Vanos and Valvetronic systems. Popular publications even recognized the engine as the best in 2012. Consider the technical characteristics of this N20B20B engine.

The volume of this apparatus is 2 liters, and the cylinder block is made of aluminum. An injector was used as a power system, it had 4 cylinders. But for each cylinder there were 4 valves. The piston stroke here is 90.1 millimeters, but the compression ratio varies from 10.2 to 11.

The maximum power in this version is 245 horsepower at 5000 rpm. The maximum torque was 350 N * m in the range from 1250 to 4800 rpm. It is best to use 95 or 98 grade gasoline as fuel.

In urban conditions, gasoline consumption is 8 liters per 62 miles, while on the highway this figure drops to 5.7 liters per 62 miles.

The viscosity of the oil should be at the level of 5W-40 or 5W-30. The volume of oil in the engine is approximately 5 liters, and its consumption is less than 700 grams per 620 miles. Replacement is carried out once every 6,200 miles.

The resource of the power apparatus is more than 155,340 miles. Tuning will help improve power to more than 300 horsepower.

BMW N20B20B engines were installed on light sedans, sports coupes or large SUVs. The installation is versatile and reliable.

2 balancing shafts are combined with steel-plated cylinders, a forged crankshaft with 4 counterweights. Direct injection and good power are provided by a solid compressor that blows 1.2 bar.

N20B20B engine specifications

Power, hp 184
Fuel type Gasoline AI-95
Volume, cm*3 1998
Maximum torque, N * m (kg * m) at rpm. 270 (28) / 4600
Fuel consumption, l/62 miles 5.9
engine’s type Inline, 4-cylinder
Add. engine information direct fuel injection
CO2 emissions, g/mil 135
Cylinder diameter, mm 82
Number of valves per cylinder four
Maximum power, hp (kW) at rpm 184 (135) / 5000
Supercharger Turbine
Start-stop system Yes
Compression ratio 11
Piston stroke, mm 94.6

Modifications Of The N20B20B engine

The usual native modification is the first and began to be produced in 2011. Here we used a pressure of 1.15 bar, compression ratio of 10, maximum power of 245 horsepower at 5000 rpm. The maximum torque here is 350 N * m is obtained at 1250-4800 rpm.

  • O0 are more produced for machines with the index 25i. The developers reduced its power to 238 horsepower at 5000 rpm. The maximum torque remained at the level of 350 N * m at 1250-4800 rpm.
  • The M0 was launched in 2012, and the compression ratio here was 10. The power was at the level of 218 horsepower at 5000 rpm. The maximum torque is 310 N * m at 1350-4800 rpm.
  • U0 has a compression ratio of up to 11, and the pressure here is blown to 0.55 bar. There is a small exhaust, and the power is equal to 184 horsepower at 5000 rpm. The maximum torque is 270 N * m. All of the listed modifications are produced today.

This engine is installed on the following models:

  • BMW 1 Series (F20)

Advantages And Reliability of The N20B20B engine

The powertrain uses Valvetronic, which has helped manufacturers reduce gas mileage by 10 percent. Here, an unusual throttle valve was used in order to supply air to all cylinders.

Air is supplied to the chambers when using an editable intake. The inlet valve is applied with editable height for proper operation. This whole described mechanism is called Valvetronic.

A turbocharged supercharger and a twin-scroll system were used here. The turbine was equipped with 2 volutes of the required size. This allows good torque at different speeds. The engine is easy to drive and responsive.

Double Vanos helps to change the phases of gas distribution. The system uses two camshafts on the exhaust and intake valves. This helps to reduce consumption and reduce the release of gas into the air. At idle, the operation of the engine stabilized, and at all speed levels, the power improved.

But the reliability and problems of the device are not limited to this. Seal rings constantly degrade their work, backlash appears and the engine wears out. Double Vanos reduces consumption, but becomes more reliable because it uses a node.

Disadvantages And Most Common Problems Of The N20B20B engine

RPMs sometimes fluctuate at idle. This problem most often occurs due to a dirty idle valve. It is standard, but you need to apply a little effort to solve it. This destabilizes the valves.

The N20B20B engine vibrates due to old fuel injectors. This error is very common. The resource of the nozzle often ends at the wrong time, which worsens the process of injecting the air or fuel mixture. They enter the cylinder with the wrong ratio and disturb the dynamics and parameters.

A broken air flow meter causes ignition delays. This enriches the air and fuel mixtures. Because of this, fuel consumption will increase, because the composition will contain more than you need fuel and less than you need air.

Electronics may fail under long maximum load. Therefore, the use of the engine at maximum capabilities is not required.

Very frequent oil and gasoline changes will not show the full efficiency of the N20B20B engine. It is most correct to fill in 98 brand of gasoline and use the oil that is recommended by the developers.

Some motorists claim that the oil supply is poorly implemented. Until 2013, this problem arose after 62,130 miles. At this time, the earbuds rotate, but the problem is not detected during driving.

Only during jamming can you feel it. But after restyling, the manufacturers removed this malfunction. The N20B20B connecting rod does not correspond to the declared parameters and very quickly fails.

Chip tuning Of The N20B20B engine

The easiest way to increase the power of the model from 245 to 280 horsepower is to apply the classic tuning of the first stage. The second stage involves the replacement of the intercooler, cold intake and exhaust.

All these changes will help to achieve a power of 300 horsepower. N20B20A and N20B20B, the difference is that the resource decreases after a while.

On this model, tuning is not strongly recommended, because it leads to rapid wear of the N20B20B engine. The resource of the internal combustion engine in its initial form is 250 horsepower.

Therefore, tuning will only help to significantly reduce these figures. Most likely, it is worth buying another engine that will not lose its resource when tuning.

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