The saloon model was the first model sold of the 5th generation BMW 3 series. Debuting in the US in 2006, the E90 came in two trims, the 325i/xi and 330i/xi models. Later, the 3 Series lineup received an engine boost with the debuts of the 2007 328i/xi and 335i/xi models, the 335i/xi receiving the new 3.0L twin-turbo inline-6 engine

BMW N54

The N54 is a direct injection twin-turbocharged straight-6 automobile engine from BMW. It was launched in late 2006 as a high-performance option for the BMW 3-Series, first to be released along with the new 3-series E92 Coupé, to be followed closely by other existing 3-series models, then with...

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The Canadian 3 Series followed the US very closely, and also had an additional trim in the entry-level 323i RWD saloon, which takes over from the 1997 BMW 320i (E36) and its 168 hp 2.2-litre inline six, which was in turn preceded by the 1997 BMW 318i 138 hp inline four.