The saloon model was the first model sold of the 5th generation BMW 3 series. Debuting in the US in 2005 as a 2006 model, 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.

The Canadian 3 Series followed the US very closely, and also had an additional trim in the 323i RWD sedan. As the base model, the 323i does not have available or optional; Xenon headlamps, fog lamps, automatic climate control, power-adjustable seats, satellite navigation, premium audio, and Dakota leather upholstery. Amenities like a glass sunroof, heated front seats, Bluetooth, and USB input are options on the 323i that are standard on the more expensive 3 Series trims. In 2011, the BMW 323i Luxury Edition was released, which included an automatic transmission, 17-inch alloy wheels, electric front seats, Bluetooth and USB compatibility, and an electric glass sunroof.