Mazda Mazda3 IV (BP) (2019 – 2025)

Reliability score : 8.8/10

The fourth-generation Mazda3 (internal code BP) marks a major turning point for the Hiroshima manufacturer, with an assumed move upmarket towards the premium segment. Based on the new Skyactiv-Vehicle Architecture, it abandons multi-link rear suspension for a torsion beam axle, a controversial but remarkably well-tuned choice. Available as a 5-door hatchback with a very bold design and a more classic 4-door sedan, it stands out for its exceptional interior finish quality, high-level sound insulation, and driver-centric ergonomics. It is also the model that inaugurated the revolutionary Skyactiv-X engine (spark-controlled compression ignition). A slight technological facelift occurred in 2024 (new 10.25-inch screen, wireless connectivity, abandonment of the 2.0L engine in favor of a detuned

✅ Strengths

Exceptional overall mechanical reliability (especially Skyactiv-G naturally aspirated engines)
Interior finish quality worthy of the premium segment (Audi, BMW)
Ergonomics of physical controls (no all-touchscreen)
Very advanced sound insulation (double glazing, absorbent materials)
6-speed manual gearbox among the best on the market (short throws, precision)
Spectacular exterior design (Kodo Design)

⚠️ Weaknesses

Very fragile paint (especially Soul Red Crystal and Machine Gray): frequent stone chips
Rear passenger space and trunk volume (358 L) below the category average
Very poor 3/4 rear visibility on the 5-door version (Hatchback)
Non-touch infotainment system while driving (a deliberate choice by Mazda, but divisive)
Naturally aspirated engines lacking low-end punch compared to turbocharged competitors

🎯 Verdict

The Mazda3 (BP) is a top-tier choice on the used car market for those who prioritize reliability, design, and driving pleasure over cargo volume. The Skyactiv-G (2.0 and 2.5) engines are absolute benchmarks in terms of durability, avoiding the pitfalls of competing small turbo engines. The Skyactiv-X engine is a remarkable technical achievement, but it is preferable to aim for models from 2021 onwards (e-Skyactiv X 186 hp) for better fluidity and proven software reliability. The only real drawback remains the fragility of the paint, which requires rigorous inspection before purchase.