N43B16
BMW N43B16 Engine
N43B16 Specs
| Manufacturer | BMW Plant Hams Hall |
| Also called | BMW N43 |
| Production | 2007-2011 |
| Cylinder block alloy | Aluminum |
| Configuration | Straight-4 |
| Valvetrain | DOHC 4 valves per cylinder |
| Piston stroke, mm (inch) | 75.7 (2.98) |
| Cylinder bore, mm (inch) | 82 (3.23) |
| Compression ratio | 12 |
| Displacement | 1599 cc (97.6 cu in) |
| Power output | 90 kW (122 HP) at 6,000 rpm |
| Torque output | 160 Nm (118 lb·ft) at 4,250 rpm |
| Redline | 7,300 rpm |
| HP per liter | 76.3 |
| Fuel type | Gasoline |
| Fuel system | Siemens MSD 81.2 |
| Weight, kg (lbs) | – |
| Fuel consumption, L/100 km (mpg) -City -Highway -Combined |
for E87 116i 7.5 (31.4) 4.8 (49) 5.8 (40.6) |
| Turbocharger | Naturally aspirated |
| Oil consumption , L/1000 km (qt. per miles) |
up to 0.7 (1 qt. per 850 miles) |
| Recommended engine oil | 5W-30 5W-40 |
| Engine oil capacity, L (qt.) | 4.25 (4.5) |
| Oil change interval, km (miles) | 7,000-10,000 (4,500-6,000) |
| Normal engine operating temperature, °C (F) | – |
| Engine lifespan, km (miles) -Official information -Real |
– 250+ (155) |
| Tuning, HP -Max HP -No life span loss |
130+ – |
| The engine is installed in | BMW 116i E87 BMW 316i E90 |
BMW N43B16 engine reliability, problems and repair
BMW N43B16 engines were produced to replace N42B18. However they showed up a bit late and were constructed on base of N43B20. This motor had cylinders with smaller diameter which was 82 mm in comparison with 2-liter N43B16 engine. It has shorter crankshaft which is 75.7 mm stroke. Displacement was decreased to 1.6 liters.
If compared with its predecessor N42B18 new engine has pistons with higher compression ratio (12). At the same time direct injection system was installed while Valvetronic was removed.
Siemens MSD 81.2 engine control unit is used in new motor.
This engine was produced for BMW 16i models.
N45B16 and N46B18 versions were also produced along with new engine for cheaper BMW modifications.
1.6-liter turbocharged 4-cylinder N13B16 engine turned out to be a new gen motor which replaced N43 in 2011.
BMW N43B16 disadvantages and problems
This engine is nothing but a smaller version of N43B20. It means that it has actually the same problems. HERE you can find out detailed information on possible BMW N43 malfunctions.
BMW N43B16 engine tuning
N43B16 Chiptuning
You will hardly find any performance parts and details to complete your upgrading ideas. This is due to the fact that N43 is designed for a city driving but not for racing. If you want to get additional 10-15 HP, you need to buy cold air intake, performance exhaust and complete engine management tuning
However the best solution is to buy more powerful BMW model.
