The small 1.6-liter BMW N45B16 engine was developed in 2004 based on the predecessor N42B18. The new engine has a different crankshaft with a shorter piston stroke (it was 81, now 72 mm), different connecting rods and a modified piston. In addition, the Valvetronic valve lift system is not used on the N45B16. The cylinder head is covered with another cover, a new generator and candles are used. Engine management system Bosch ME 9.2. Since 2007, the engine has been updated, received a new Bosch ME17.4.5 control unit, and the letter N has been added to the name – N45NB16. This engine was used on BMW cars with an index of 16i. Along with this engine in the limited edition N45 series, a 2-liter sports version was also produced – the N45B20S.
Specifications
| Manufacturer | BMW Plant Hams Hall |
| Also called | N45 |
| Production years | 2004-2011 |
| Cylinder block alloy | aluminum |
| Fuel system | injector |
| Configuration | inline |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 72 |
| Cylinder bore, mm | 84 |
| Compression ratio | 10.2 |
| Displacement, cc | 1596 |
| Power output, hp | 116/6000 |
| Torque output, Nm / rpm | 150/4300 |
| Fuel type | 95 |
| Euro standards | Euro 4-5 |
| Weight, kg | — |
| Fuel consumption, L/100 km (for 116i E87) — city — highway — combined |
8.8 4.9 6.2 |
| Oil consumption, gr/1000 km | up to 700 |
| Recommended engine oil | 5W-30 / 5W-40 |
| Engine oil capacity, liter | 4.5 |
| Amount of engine oil for replacement, liter | 4 |
| Oil change interval, km | 10000 |
| Normal engine operating temperature, °C | — |
| Engine lifespan, km — official information — real |
— 250+ |
Frequent problems
- Knocking in the motor. Most often, problems are hidden in a faulty timing chain tensioner. At the same time, the chains, in principle, have a low service life and after the car has passed about 100 thousand km, they can easily stretch. Replacement required.
- Vibration at idle speed. The breakdown may be in the malfunction of the Vanos system. Therefore, it will need to be checked and cleaned. Complete replacement possible.
It should also be added that the power unit of this series can exhibit a detonation of the fuel mixture. The reason is the poor quality of fuel or oil. The latter should only be of the brand and series that the manufacturer himself advises to use – the BMW plant. Otherwise, the likelihood of developing big troubles is high – even a major overhaul is possible.
i want to know more about BMW N45.
my BMW N45 fuel consumption is 7.3km per 1 petrol litre . is that normal according to you experience. advice what to do if it is not normal place assist me on this.
sorry it N45B16 bmw.
I’d say it’s high fuel consumption, but it could be due to your driving style or operating conditions.
Even if this is a consequence of a malfunctioning engine, there can be many reasons for this.