Engine BMW N43B16

The N43B16 engine is a modification of the N43 with a capacity of 1599 cc, produced since 2007. The small 1.6-liter 4-cylinder BMW N43B16 engine replaced its predecessor N42B18 with some delay and was developed on the basis of the older N43B20. The engine was installed on BMW cars with an index of 16i. A feature of the motor is the use of the well-proven Valvetronic valve lift system. The engine has a direct fuel injection system.


Production years 2007-2011
Displacement, cc 1599
Fuel system direct injection
Power output, hp 122 /6000 rpm
Torque output, Nm 160 /4250 rpm
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 82
Piston stroke, mm 75.7
Compression ratio 12.0
Features no
Hydraulic lifters yes
Timing drive chain
Phase regulator double VANOS
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 4.25
Fuel type petrol
Euro standards EURO 4/5
Fuel consumption, L/100 km (for 116i E87)
— city
— highway
— combined
Engine lifespan, km ~240 000

Disadvantages of the N43B16 engine

When operating the BMW N43B16 engine, there are problems with floating rpm and vibration.

If the injectors need to be replaced, vibration occurs in the motor. It is necessary to check the condition of the injectors and replace them in a timely manner. If the engine vibrates and floating speed is noticeable, the problem may be in the failed ignition coils. They should be checked and replaced.

After about 80 thousand kilometers, the vacuum pump becomes unusable, the part needs to be replaced. It is also recommended to regularly check the condition of the cooling system to prevent overheating of the power unit.

Owners of a car with a BMW N43B16 engine should take into account that the unit works well on high-quality working fluids. If you save on oil, you can face the problem of engine overhaul. Better to use the oil recommended by BMW. If the motor is provided with timely maintenance with the replacement of worn parts, it will serve a long time without problems.

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