The N46 serves as the basis for the smaller BMW N45 engine (which does not have Valvetronic).
In 2007, the N46's successor - the BMW N43 - was introduced. However, the direct-injected N43 was not sold in countries with high-sulfur fuel, so the N46 continued to be produced alongside the N43. The N46 continued production until 2015, when the last N46 models were replaced by the BMW N13 turbocharged four-cylinder engine.
Design
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 Motronic version ME9.2 to version MV17.4.6.[2] The redline is 6,500 rpm.[4]
Versions
Version
Displacement
Power
Torque
Year
N46B18
1,796 cc (109.6 cu in)
85 kW (114 bhp) at 5,500 rpm
175 N⋅m (129 lb⋅ft) at 3,750 rpm
2004
N46B20U1
1,995 cc (121.7 cu in)
95 kW (127 bhp) at 5,750 rpm
180 N⋅m (133 lb⋅ft) at 3,250 rpm
2005
N46B20U2
100 kW (134 bhp) at 5,750 rpm
180 N⋅m (133 lb⋅ft) at 3,250 rpm
2007
N46B20U0
105 kW (141 bhp) at 6,000 rpm
200 N⋅m (148 lb⋅ft) at 3,750 rpm
2007
N46B20O1
110 kW (148 bhp) at 6,200 rpm
200 N⋅m (148 lb⋅ft) at 3,600 rpm
2004
200 N⋅m (148 lb⋅ft) at 3,750 rpm
N46NB20
127 kW (170 bhp) at 6,400 rpm
210 N⋅m (155 lb⋅ft) at 4,100 rpm
2007
N46B18
The N46B18 has a 1,796 cc (109.6 cu in) displacement and produces 85 kW (114 bhp) and 175 N⋅m (129 lb⋅ft).[5]
The N46B20O1 produces 110 kW (148 bhp) and 200 N⋅m (148 lb⋅ft). On models with secondary air injection, peak torque occurs at 3750 rpm instead of 3600 rpm.