In 2011, BMW vehicles started to come equipped with the 4-cylinder N20B20 turbo engine. The N53B25 and N53B30 engines were swapped out for this one. The new motor’s aluminum alloy block has two balance shafts. engine cylinders with a steel coating, a forged crankshaft with four offset counterweights, and cranks that are 144.35 mm long.
With composite camshafts, TVDI direct fuel injection, and the Valvetronic 3 and Double-Vanos systems, the engine’s cylinder head resembles the N55.
Specifications
| Production years | 2011-2018 |
| Displacement, cc | 1997 |
| Fuel system | direct injection |
| Power output, hp | 156/5000 184/5000 218/5500 245/5000 |
| Torque output, Nm | 240 270 310 350 |
| 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 |
8.8 5.6 6.8 |
| Engine lifespan, km | ~220 000 |
Disadvantages of the N20B20 engine
Vibrations, higher fuel consumption, and floating speed are signs of BMW N20B20 engine malfunctions.
Unclean injectors are the primary source of unit vibrations. Most of the time, the issue is swiftly fixed.
The throttle and idle valves should be examined if the speed is floating because they can get extremely dirty and interfere with the power unit’s ability to function.
An air mass meter malfunction could be the cause of an increase in fuel consumption. One of the primary justifications for being initially ruled out is this.
When using the BMW N20B20 engine, it is not advisable to use less working fluid. Filling up with premium oil and gasoline that BMW recommends is advised. The BMW N20B20 engine will operate dependably with routine maintenance and diagnostics.