The car initially drew criticism, due to its controversial styling and complicated iDrive system.

[6] BMW described the styling philosophy as "flame surfacing", where concave and convex shapes meet to create sharp edges.

[29][30] Additional features included: sports seats, larger front and rear brakes, an M-performance instrument cluster, a carbon-fibre roof (coupé only), and an optional M head-up Display.

Major changes include: Models feature BMW's Advanced Safety System, enabling the car to decide the most effective deployment of the airbags in a crash.

[42] Safety equipment includes active anti-roll bars, dynamic stability control, front knee airbags (in accordance with US regulation), BMW roadside assistance, and an SOS emergency system.

[44] From 2008, active head restraints became a standard feature on all seat options, reducing the risk of neck injuries in a rear-end collision.