BMW N43

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BMW N43 engine
Overview
Production2007-2011
Layout
ConfigurationInline-4
Displacement1.6–2.0 L (98–122 cu in)
Block materialAluminium
Head materialAluminium
ValvetrainDOHC, with VVT
Combustion
Fuel typePetrol
Chronology
PredecessorBMW N46/N45
SuccessorBMW N13

The BMW N43 is a naturally aspirated four-cylinder petrol engine which was sold from 2006-2013. 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.

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[]

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[]

The 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:

  • 2007-2009 E87 116i
  • 2008 E90 316i

N43B20[]

The 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:mariefren 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[]

References[]

  1. ^ "BMW 116i now powered by 2.0L N46 Valvetronic". www.paultan.org. Retrieved 3 June 2012.
  2. ^ "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.
  3. ^ a b c "Engine specifications for N43 engines". www.bmwheaven.com. Retrieved 3 June 2012.
  4. ^ a b "BMW N43B16 Engine". www.mywikimotors.com. Retrieved 1 April 2017.
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