The fifth-generation BMW 3 Series (E90 sedan, E91 Touring, E92 coupé, E93 convertible) marked a technological and stylistic turning point for the brand. Designed under the Chris Bangle era, it abandoned the driver-oriented center console (reintroduced later) and introduced the iDrive system, Run-Flat tires, and optional active steering. The model underwent a major facelift (LCI - Life Cycle Impulse) in late 2008, correcting many early flaws, improving interior finish, modernizing the lights (LED), and replacing the slow iDrive CCC system with the much more efficient CIC. Mechanically, the E90 experienced the transition from the legendary naturally aspirated 6-cylinder indirect injection engines (N52) to direct injection (N53) and forced induction (N54/N55), bringing fuel consumption gains
The BMW 3 Series E90 is a car with two faces. It offers one of the best driving experiences of its generation, but it fell into an era of technological transition at BMW that led to major design flaws. The verdict depends entirely on the engine. - BUY (almost) with your eyes closed: The naturally aspirated 6-cylinder indirect injection versions (325i/330i with N52) or the large M57 diesels (325d/330d before 2008). Prioritize LCI models (post-2008) for the finish and iDrive CIC. - AVOID: The N47 4-cylinder diesels (318d/320d 2007-2012) without proof of chain replacement, and the N43 4-cylinder petrol engines. - For informed enthusiasts: The 335i (N54/N55) offers supercar performance for the price of a city car, but expect an annual repair budget of 1500 to 3000 €.