The dynamic N20B16 petrol 4-cylinder turbo engine has been in production since 2013, representing a driving force in select BMW 3- and 5-series vehicles specifically tailored for the Turkish, Greek, and Vietnamese markets with the 20i index.
Engine Installation in BMW Models
This robust engine found its place in several BMW models:
- BMW F10 520i: Installed in models from 2013 to 2016.
- BMW G30 520i: Continues to power models since 2017.
- BMW G20 320i: Has been the engine of choice since 2018.
|Power output, hp
|143 – 170
|Torque output, Nm
|220 – 250
|Cylinder bore, mm
|Piston stroke, mm
|Recommended engine oil
|Engine oil capacity, liter
|Fuel consumption, L/100 km (for BMW 320i 2012)
|Engine lifespan, km
Most Common N20B16 Engine Problems
While the N20B16 engine offers commendable performance, several persistent issues have been noted by owners:
Oil Pump Performance and Engine Wedging
One prevalent concern involves the insufficient performance of the oil pump, resulting in frequent instances of engine wedging. The loss of elasticity in the oil pump circuit often emerges as a primary cause of engine jamming.
Oil Filter Cup Cracks and Leakage
Another notable issue is the susceptibility of the plastic cup of the oil filter, often paired with the heat exchanger, to crack and cause leakage, potentially impacting engine operation and reliability.
Rapid Fuel Injector Contamination and Vibrations
Fuel injectors are prone to rapid contamination, leading to the accumulation of dirt and subsequent vibrations, affecting the engine’s smooth operation and performance.
Limited Lifespan of Components like Flow Meter and Idle Control Valve
Components such as the flow meter and idle control valve are known for their relatively limited lifespan, posing concerns regarding their durability and consistent functionality.
The N20B16 petrol 4-cylinder turbo engine stands as a hallmark of BMW’s commitment to delivering power, efficiency, and performance in select models designed for specific markets. Its continued integration across BMW’s lineup underscores its reliability and contribution to the driving experience in the esteemed 3- and 5-series cars.
While the N20B16 engine delivers notable performance, persistent issues such as oil pump performance, oil filter cup vulnerability, fuel injector contamination, and limited component lifespan necessitate meticulous attention and maintenance. Owners are advised to undertake timely checks and maintenance to ensure optimal engine performance and reliability.