The Mazda3 Generation I (BK), introduced in 2003 to replace the aging 323/Familia, marked a revolution for the brand. Built on the excellent Ford C1 platform (shared with the Ford Focus Mk2 and Volvo S40/V50), it immediately stood out for its class-leading driving dynamics, sharp steering, and sporty design. Available as a 5-door hatchback and a 4-door sedan, it was sold globally (known as the Axela in Japan). A mid-cycle facelift in 2006 brought slight cosmetic tweaks, improved sound insulation, a 6-speed manual for the 2.0L petrol, and crucially, slightly better (though still imperfect) rust protection. While its petrol engines are renowned for their bulletproof reliability, the BK generation's reputation is heavily marred by severe corrosion issues and problematic diesel powertrains bor
The Mazda3 BK is a fantastic driver's car hidden behind a massive rust problem. If you are in the market for one, petrol engines are mandatory—they are incredibly robust and will easily outlast the chassis. The diesel variants, particularly the 1.6 MZ-CD, should be avoided unless they come with a flawless, documented maintenance history. Your primary concern when buying a Mazda3 BK is not mechanical, but structural: inspect the car meticulously for rust. Favor post-2006 facelift models, which received slightly better anti-corrosion treatment and improved sound deadening.