[1] The N46 serves as the basis for the smaller BMW N45 engine (which does not have Valvetronic).

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.

Compared with its N42 predecessor, the N46 features a revised crankshaft, intake manifold[2] and valvetrain.

[4] 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).