BMW N43

BMW N43 engine
Overview
Production2007-2011
Layout
ConfigurationInline-4
Displacement1.6 L (1,599 cc)
2.0 L (1,995 cc)
Cylinder bore82 mm (3.23 in)
84 mm (3.31 in)
Piston stroke75.7 mm (2.98 in)
90 mm (3.54 in)
Cylinder block materialAluminium
Cylinder 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 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.

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.

  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. ^ Cite error: The named reference bmwheaven was invoked but never defined (see the help page).