2.5 MZR (petrol)
2007–2012 · petrol · 2488cc · 170hp
Engine codes: L5
Reliability, common problems and owner reviews for the Mazda Mazda 6 2.5 MZR (petrol). Check this before you buy used.
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.
Known Issues
The variable-valve-timing actuator can tick on cold start as it wears — a known MZR trait.
Fix / Workaround: Investigate a cold-start tick; replace the VVT actuator if confirmed.
Repair cost: €150–€500
Typically appears after: 150,000 km
Chain is rated for life but depends on clean oil; a worn chain/tensioner knocks under ~2,000 rpm on neglected, very high-mileage cars.
Fix / Workaround: Keep oil changes regular; investigate any chain rattle.
Repair cost: €400–€900
Typically appears after: 220,000 km
Thirsty vs the smaller petrols — not a fault.
Fix / Workaround: Budget for fuel.
0Mileage Thresholds
After 150,000 km: VVT actuator tick on cold start can appear.
After 300,000 km: The most durable MZR — routinely reached with oil care.
Pre-Purchase Checklist
- ☐Cold start: listen for a VVT tick
- ☐Confirm regular oil-change history
- ☐Robust engine — accept higher fuel use
Frequently asked questions
Is the Mazda Mazda 6 2.5 MZR (petrol) reliable?
Reliable — 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.
What are the common problems and reviews for the Mazda Mazda 6 2.5 MZR (petrol)?
The most commonly reported problems: VVT actuator tick on cold start, Timing chain / tensioner (oil-dependent), Higher fuel consumption.
Is a used Mazda Mazda 6 2.5 MZR (petrol) worth buying?
Minor issues only, easy to maintain, no design flaws. A safe used buy.