BMW N43

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BMW N43 engine
Overview
Manufacturer BMW
Production 2007-2011
Layout
Configuration straight-4 DOHC
Chronology
Predecessor BMW N46/N45
Successor BMW N13

The BMW N43 is a straight-4 naturally aspirated DOHC engine which was sold from 2006-2013. It replaced the N46 (and related N45),[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 turbocharged N13.

Models[edit]

Engine Displacement Power Torque Year
N43B16 1,599 cc 90 kW (121 hp)
@ 6000 rpm
160 N⋅m (118 lb⋅ft)
@ 4250 rpm
2008-2011
N43B20 1,995 cc 90 kW (121 hp)
@ 6000 rpm
185 N⋅m (136 lb⋅ft)
@ 3000 rpm
2007-2011
110 kW (148 hp)
@ 6000 rpm
200 N⋅m (148 lb⋅ft)
@ 4500 rpm
127 kW (170 hp)
@ 6700 rpm
210 N⋅m (155 lb⋅ft)
@ 4250 rpm

N43B16[edit]

The N43B16 has a 1,599 cc (98 cu in) displacement and produces 90 kW (121 hp) and 160 N⋅m (118 lb⋅ft).[3] It is the successor to the N45 engine and, as per the N45, does not have valvetronic.[4]

Applications:

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

N43B20[edit]

The N43B20 has a 1995 cc displacement and produces up to 127 kW (173 PS; 170 hp) and 210 Nm.[3][4]

In 2009, the 2.0 litre N43B20 replaced the 1.6 litre N43B16 in the 116i. Power remained at 90 kW (121 hp), however torque was increased. It is suggested that this 90 kW version might not have valvetronic.

Applications:

90 kW (121 hp) and 185 N⋅m (136 lb⋅ft) version

110 kW (148 hp) and 190 N⋅m (140 lb⋅ft) version

127 kW (170 hp) and 210 N⋅m (155 lb⋅ft) version

See also[edit]

References[edit]

  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. 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.