Mazda 6
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Which Mazda Mazda 6 engine is the most reliable? See common problems, reviews and reliability verdicts across generations and engines.
Frequently asked questions
Which Mazda Mazda 6 engine is the most reliable?
2.5 MZR (petrol) — Reliable verdict. The 2.5 MZR (L5) is widely regarded as the most durable of the family — smooth, punchy and good for 300,000+ km with maintenance. It's the strongest pick here; the only caveats are shared MZR traits (a VVT actuator that can tick on cold start with age, and a timing chain that lasts the life of the engine provided the oil is kept clean) plus the obvious thirst. Look after oil and coolant and it's about as dependable as petrol gets.
Which Mazda Mazda 6 engines should you avoid?
Engines with the weakest reliability verdicts: 2.0 MZR-CD (diesel), 2.2 MZR-CD (diesel).
What are the most common Mazda Mazda 6 problems?
The most commonly reported problems across all Mazda Mazda 6 generations and engines: Timing chain / tensioner (oil-dependent), VVT actuator tick on cold start, Overheating sensitivity, Oil dilution (fuel in oil), DPF clogging.