BMW N42
# BMW N42

The BMW N42 is a DOHC four-cylinder petrol engine which replaced the BMW M43 and was produced from 2001-2004.

The N42 serves as the basis for the smaller N40 engine (which does not have Valvetronic).

The N42B18 won the 1.4-1.8 L category of the International Engine of the Year awards for 2001.

In 2004, the N42 was replaced by the BMW N46 four-cylinder engine.

## Design

Compared with its M43 predecessor, the N42 features a DOHC valvetrain, VANOS (variable valve timing) and an aluminium engine block. It was the first BMW engine to have Valvetronic (variable valve lift).

## Versions

| Version | Displacement | Power | Torque | Year |
| - | - | - | - | - |
| N42B18 | 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 | 2001-2004 |
| N42B20 | 1,995 cc (121.7 cu in) | 105 kW (141 bhp) at 6,000 rpm | 200 N⋅m (148 lb⋅ft) at 3,750 rpm | 2001-2004 |

## N42B18

The N42B18 has a displacement of 1,796 cc (109.6 cu in), uses Bosch Motronic ME9.2 engine management and has twin-balancing shafts.

Applications:

* 2001-2004 E46 316i and 316ti

## N42B20

The N42B20 has a displacement of 1,995 cc (121.7 cu in), uses Bosch DME ME9.2 fuel injection and has twin-balancing shafts. The N42B20 revs to 6600 rpm

Applications:

* 2001-2004 E46 318i/318Ci/318ti
