BMW N46

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BMW N46 engine
BMW N46.JPG
Overview
Manufacturer BMW
Production 2004-2015
Combustion chamber
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 N42 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[edit]

Engine Displacement Power Torque Redline[4] Year
N46B18 1,796 cc 85 kW (116 PS; 114 hp) @ 5500 175 N·m (129 lb·ft) @ 3750 6500 2004
N46B20U1 1,995 cc 95 kW (129 PS; 127 hp) @ 5750 180 N·m (133 lb·ft) @ 3250 6500 2004
N46B20U2 100 kW (136 PS; 134 hp) @ 5750 180 N·m (133 lb·ft) @ 3250 6500 2007
N46B20O0 105 kW (143 PS; 141 hp) @ 6000 200 N·m (148 lb·ft) @ 3750 6500 2004
N46B20O1 110 kW (150 PS; 148 hp) @ 6200 200 N·m (148 lb·ft) @ 3600 6500 2004
110 kW (150 PS; 148 hp) @ 6200 200 N·m (148 lb·ft) @ 3750 6500 2004
N46NB20 115 kW (156 PS; 154 hp) @ 6400 200 N·m (148 lb·ft) @ 3600 6500 2007

N46B18[edit]

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

Applications:

N46B20U1[edit]

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

Applications:

N46B20U2[edit]

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:

N46B20O0[edit]

The N46B20O0 produces 105 kW (141 hp) and 200 N·m (148 lb·ft).

Applications:

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

N46B20O1[edit]

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[edit]

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[edit]

References[edit]

  1. ^ "X1 E84 18i model selection". www.realoem.com. Retrieved 24 March 2017. 
  2. ^ a b "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. ^ a b "Engine specifications for N46 engines". www.bmwheaven.com. Retrieved 3 June 2012.