Buy the wrong generation and you're signing up for a warranty engine replacement before 50k miles. The 2017-2023 Kona carries Hyundai's Theta II engine curse, catastrophic bearing failures that one tech saw 960 times in 13 years, plus a dry-clutch DCT that jerks through parking lots like a teenager learning stick. The 2024+ redesign is a different animal entirely: new SmartStream engines with no systematic issues yet, an actual 8-speed automatic, and genuinely competitive packaging for the money. If you're shopping used, generation matters more than mileage. New buyers get a roomy, tech-loaded subcompact that punches above its price point. Used buyers gambling on first-gen models better hope that 100k powertrain warranty outlasts the engine, and that their dealership answers texts during the months-long repair wait.
Mazda built a $50k SUV that drives like it costs $70k, sharp handling, a silky inline-6, and an interior that embarrasses the Highlander, but shipped it before the transmission learned its lines. The 8-speed shudders and hesitates at low speeds across enough reports to call it systematic, not a lemon-lottery issue, and early PHEVs needed steering racks and 12V batteries replaced under warranty. If you prize driving feel over appliance-smooth operation and can live with first-year quirks (2026s show real improvement), the CX-90 delivers shocking value; if you need bulletproof out-of-the-gate execution, wait a year or stick with the boring-but-reliable competition.