The third-generation Mazda3 (code name BM for 2013-2016, then BN for the 2016-2019 facelift) marks a major turning point for the Hiroshima-based manufacturer. It introduced the “Kodo” design and the full integration of “Skyactiv” technologies (lightweight chassis, engines with extreme compression ratios). While this compact car excels in driving pleasure, meticulous finish, and the exceptional reliability of its gasoline engines (Skyactiv-G), the outcome is diametrically opposed for its diesel engines (Skyactiv-D). The 2.2 diesel unit, in particular, suffers from major design flaws that heavily tarnish the model's reliability record. The 2016 facelift (BN) brought improvements in sound insulation, the integration of G-Vectoring Control, and an infotainment system update.
The third-generation Mazda3 is a car with two faces. If you opt for a gasoline engine (Skyactiv-G), it's a highly recommended purchase: you'll benefit from one of the most reliable and enjoyable compact cars on the market. However, if you're targeting the diesel (especially the 2.2 Skyactiv-D), extreme caution is advised. Design flaws in this engine (camshafts, injector seals, strainer) have caused numerous engine failures. The purchase of a used 2.2D should only be considered if the vehicle has a 100% Mazda network service history, with proof of preventive actions (injector seal replacement and strainer cleaning). The 1.5D is less risky but remains sensitive to clogging. Prioritize gasoline!