Engine BMW N20B20

The 4-cylinder N20B20 turbo engine began to be installed on BMW cars in 2011. The engine replaced the N53B25 and N53B30 units. The block of the new motor is made of aluminum alloy and contains two balance shafts. Steel-coated engine cylinders, forged crankshaft with four offset counterweights, 144.35mm long cranks.

The cylinder head of the engine is similar to the N55, with composite camshafts and TVDI direct fuel injection, contains the Valvetronic 3 and Double-Vanos system.


Production years 2011-2018
Displacement, cc 1997
Fuel system direct injection
Power output, hp 156/5000
Torque output, Nm 240
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 84
Piston stroke, mm 90.1
Compression ratio 10 – 11
Features Valvetronic III
Hydraulic lifters yes
Timing drive chain
Phase regulator double VANOS
Turbocharging twin-scroll
Recommended engine oil 5W-30
Engine oil capacity, liter 5.0
Fuel type petrol
Euro standards EURO 5/6
Fuel consumption, L/100 km (for 320i F30)
— city
— highway
— combined
Engine lifespan, km ~220 000

Disadvantages of the N20B20 engine

Malfunctions in the BMW N20B20 engine are the appearance of vibrations, increased fuel consumption and floating speed.

  • The main cause of unit vibrations is dirty injectors. In most cases, the problem is resolved quickly.
  • If the speed is floating, the condition of the idle valve and throttle valve should be inspected – they can become very dirty and cause a malfunction in the operation of the power unit.
  • When there is an increase in fuel consumption, the problem may be hidden in a malfunction of the air mass meter. This is one of the main reasons to be ruled out in the first place.

It should be borne in mind that when operating the BMW N20B20 engine, it is better not to save on working fluids. It is advisable to fill up with high-quality gasoline and oil recommended by BMW. With regular diagnostics and maintenance, the BMW N20B20 engine will work reliably.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top