N46

2004–2012•4 cyl•Inline•Al / Al

← Predecessor: N42

Valvetronic on all versions
Improved cooling system
Reduced oil consumption thanks to new oil control rings

The BMW N46 is an improved version of the N42 engine, produced from 2004 to 2012. Valvetronic became standard on all models and was made more reliable. Improved cooling and piston design reduced oil consumption. Double VANOS, all-aluminium block. Displacement 1.8 or 2.0 L, up to 170 hp (2.0 L). Used in E90, E87.

More reliable than N42 despite occasional Valvetronic and valve seal issues. Lifespan can exceed 250,000 km.