BMW N46

BMW N46 engine
Overview
Manufacturer BMW
Production 2004-2015
Layout
Configuration straight-4 DOHC
Chronology
Predecessor BMW N42
Successor BMW N43

The BMW N46 is a straight-4 DOHC piston engine which replaced the N42 and was produced from 2004 to 2015.[1]

Compared with its N42 predecessor, the N46 features a revised crankshaft, intake manifold[2] and valvetrain.[3] In 2007, the N46 was updated, which was known as the N46N. Changes included the intake manifold, exhaust camshaft and the engine control unit was changed from Bosch ME9.2 to Bosch MV17.4.6.[2]

The N46 serves as the basis for the smaller N45 engine (which does not have valvetronic).

In 2007, the N46's successor - the N43 - was introduced. However, the direct-injected N43 was not sold in countries with high-sulfur fuel, so the N46N continued to be produced alongside the N43. The N46N continued production until 2015, when the last N46 models were replaced by the turbocharged N13.

Models

EngineDisplacementPowerTorqueRedline[4]Year
N46B181,796 cc85 kW (116 PS; 114 hp) @ 5500175 N⋅m (129 lb⋅ft) @ 375065002004
N46B20U11,995 cc95 kW (129 PS; 127 hp) @ 5750180 N⋅m (133 lb⋅ft) @ 325065002004
N46B20U2100 kW (136 PS; 134 hp) @ 5750180 N⋅m (133 lb⋅ft) @ 325065002007
N46B20O0105 kW (143 PS; 141 hp) @ 6000200 N⋅m (148 lb⋅ft) @ 375065002004
N46B20O1110 kW (150 PS; 148 hp) @ 6200200 N⋅m (148 lb⋅ft) @ 360065002004
110 kW (150 PS; 148 hp) @ 6200200 N⋅m (148 lb⋅ft) @ 375065002004
N46NB20115 kW (156 PS; 154 hp) @ 6400200 N⋅m (148 lb⋅ft) @ 360065002007

N46B18

The N46B18 has a 1796 cc displacement and produces 85 kW (116 PS; 114 hp) and 175 Nm.[5]

Applications:

N46B20U1

The N46B20U1 produces 95 kW (127 hp) and 180 N⋅m (133 lb⋅ft).[5]

Applications:

N46B20U2

The N46B20U2 produces 100 kW (134 hp) and 180 N⋅m (133 lb⋅ft). It was used instead of the N43 in countries with high-sulfur fuel.

Applications:

N46B20A

The N46B20A produces 105 kW (141 hp) and 200 N⋅m (148 lb⋅ft).

Applications:

  • 2004-2006 E46 318i, 318Ci and 318ti

N46B20O1

The N46B20O1 produces 110 kW (148 hp) and 200 N⋅m (148 lb⋅ft). On models with secondary air injection, peak torque occurs at 3750 rpm instead of 3600 rpm.

Applications:

  • 2004-2007 E83 X3 2.0i
  • 2005-2008 E85 Z4 2.0i
  • 2004-2007 E87 120i
  • 2005-2007 E90/E91 320i

N46NB20

The N46NB20 produces 115 kW (154 hp) and 200 N⋅m (148 lb⋅ft). It was used instead of the N43 in countries with high-sulfur fuel.

Applications:

See also

References

  1. ↑ "X1 E84 18i model selection". www.realoem.com. Retrieved 24 March 2017.
  2. 1 2 "BMW N46B30 engine". www.mywikimotors.com. Retrieved 24 March 2017.
  3. ↑ "BMW N43, N45 and N46 Four Cylinder Valvetronic Engines". www.unixnerd.demon.co.uk. Retrieved 24 March 2017.
  4. ↑ "BMW Workshop Manual". www.workshop-manuals.com. Retrieved 13 July 2013.
  5. 1 2 "Engine specifications for N46 engines". www.bmwheaven.com. Retrieved 3 June 2012.
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