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BMW N43

FieldValue
nameBMW N43 engine
imageMotorraum eines BMW E88.jpg
production2007-2011
configurationInline-4
headAluminium
blockAluminium
valvetrainDOHC, with VVT
fueltypePetrol
displacement1599 cc
1995 cc
bore82 mm
84 mm
stroke75.7 mm
90 mm
predecessorBMW N46/N45
successorBMW N13

1995 cc 84 mm 90 mm

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. However the N43 was not sold in countries with high sulfur fuel, therefore the N45/N46 engines remained in production alongside the N43.

Compared with its N46 predecessor, the N43 features direct injection.

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

VersionDisplacementPowerTorqueYear
N43B161599 cc90 kW
at 6,000 rpm160 Nm
at 4,250 rpm2008-2011
N43B201995 cc185 Nm
at 3,000 rpm2007-2011
105 kW
at 6,000 rpm190 Nm
at 4,500 rpm
125 kW
at 6,700 rpm210 Nm
at 4,250 rpm

N43B16

The N43B16 has a displacement of 1599 cc and produces 90 kW and 160 Nm. It is the successor to the BMW N45 engine and, as per the N45, does not have Valvetronic.

Applications:

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

N43B20

The N43B20 has a displacement of 1995 cc and produces up to 125 kW and 210 Nm.

In 2009, the 1995 cc N43B20 replaced the 1599 cc N43B16 in the 116i and 316i. Power remained at 90 kW, however torque was increased.

Applications: 90 kW version

  • 2007-2011 E81/E87 116i
  • 2009-2011 E90/E91 316i

105 kW version

  • 2007-2011 E90/E91/E92/E93 318i
  • 2008-2011 E81/E87/E88 118i

125 kW version

  • 2007-2011 E81/E82/E87/E88 120i
  • 2007-2011 E90/E91/E92/E93 320i
  • 2007-2009 E60/E61 520i

References

References

  1. "BMW 116i now powered by 2.0L N46 Valvetronic".
  2. "BMW N43, N45 and N46 Four Cylinder Valvetronic Engines".
  3. "Engine specifications for N43 engines".
  4. (11 April 2015). "BMW N43B16 Engine".
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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