The BMW N43 is a naturally aspirated four-cylinder petrol engine which was sold from 2006 to 2013. It replaced both the BMW N46 and BMW N45 engines.[1] However the N43 was not sold in countries with high sulfur fuel,[2] therefore the N45/N46 engines remained in production alongside the N43.
| BMW N43 engine | |
|---|---|
| Overview | |
| Production | 2007-2011 |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 1.6 L (1,599 cc) 2.0 L (1,995 cc) |
| Cylinder bore | 82 mm (3.23 in) 84 mm (3.31 in) |
| Piston stroke | 75.7 mm (2.98 in) 90 mm (3.54 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC, with VVT |
| Combustion | |
| Fuel type | Petrol |
| Chronology | |
| Predecessor | BMW N46/N45 |
| Successor | BMW N13 |
Compared with its N46 predecessor, the N43 features direct injection.[3]
In 2011, as part of BMW's shift to turbocharging, the N43 was replaced by the BMW N13 turbocharged four-cylinder engine. The N43 suffered various problems in service - breakage of the cam chain plastic guides leading to oil starvation as the debris blocked the oil strainer, and problems with the injectors, coil packs and the NOx sensor.
Versions
edit| Version | Displacement | Power | Torque | Year |
|---|---|---|---|---|
| N43B16 | 1,599 cc (97.6 cu in) | 90 kW (121 bhp) at 6,000 rpm |
160 N⋅m (118 lb⋅ft) at 4,250 rpm |
2008-2011 |
| N43B20 | 1,995 cc (121.7 cu in) | 185 N⋅m (136 lb⋅ft) at 3,000 rpm |
2007-2011 | |
| 105 kW (141 bhp) at 6,000 rpm |
190 N⋅m (140 lb⋅ft) at 4,500 rpm | |||
| 125 kW (168 bhp) at 6,700 rpm |
210 N⋅m (155 lb⋅ft) at 4,250 rpm |
N43B16
editThe N43B16 has a displacement of 1,599 cc (97.6 cu in) and produces 90 kW (121 bhp) and 160 N⋅m (118 lb⋅ft).[3] It is the successor to the BMW N45 engine and, as per the N45, does not have Valvetronic.[4]
Applications:
N43B20
editThe N43B20 has a displacement of 1,995 cc (121.7 cu in) and produces up to 125 kW (168 bhp) and 210 N⋅m (155 lb⋅ft).[3][4]
In 2009, the 1,995 cc (121.7 cu in) N43B20 replaced the 1,599 cc (97.6 cu in) N43B16 in the 116i. Power remained at 90 kW (121 bhp), however torque was increased.
Applications: 90 kW (121 bhp) version
- 2007-2011 E81/E87 116i
105 kW (141 bhp) version
- 2007-2011 E90/E91/E92/E93 318i
- 2008-2011 E81/E87/E88 118i
125 kW (168 bhp) version
- 2007-2011 E81/E82/E87/E88 120i
- 2007-2011 E90/E91/E92/E93 320i
- 2007-2009 E60/E61 520i
See also
editReferences
edit- ^ "BMW 116i now powered by 2.0L N46 Valvetronic". www.paultan.org. Retrieved 3 June 2012.
- ^ "BMW N43, N45 and N46 Four Cylinder Valvetronic Engines". www.unixnerd.demon.co.uk. Archived from the original on 17 February 2020. Retrieved 1 April 2017.
- ^ a b c "Engine specifications for N43 engines". www.bmwheaven.com. Retrieved 3 June 2012.
- ^ a b "BMW N43B16 Engine". www.mywikimotors.com. 11 April 2015. Retrieved 1 April 2017.