EngineHigh
Skyactiv-D diesel carbon build-up and oil dilution on short journeys
- Typically appears
- 70,000+ miles
- What to inspect
- Check the oil level for rising level and test under load
2013–2024 Mazda Mazda6 · common problems & known faults
A handsome saloon and estate with a strong reliability record, favoured by high-mileage private buyers.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed August 2026
Quick answer
The most commonly reported faults on the 2013–2024 Mazda Mazda6 are Skyactiv-D diesel carbon build-up and oil dilution on short journeys, DPF blocking on town-used diesels and Rear arch and sill corrosion on earlier cars. 2 of the documented issues are rated high severity · inspect these first. Full inspection points, onset mileage and what to check are listed below.
Reliability snapshot
Based on the documented faults on this page for the Mazda Mazda6.
6.7/ 10
- Critical
- 0
- High
- 2
- Medium
- 2
- Low
- 0
Guidance only · reflects reported patterns, not a specific car's condition.
Known faults to check
ExhaustHigh
DPF blocking on town-used diesels
- Typically appears
- 70,000+ miles
- What to inspect
- Run to temperature and confirm no light returns
BodyMedium
Rear arch and sill corrosion on earlier cars
- Typically appears
- Age-related
- What to inspect
- Inspect the arches and sills carefully
SuspensionMedium
Bush and drop link wear at higher mileage
- Typically appears
- 90,000+ miles
- What to inspect
- Listen over rough tarmac
Inspecting a Mazda Mazda6?
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Check this exact carFrequently asked questions
Is the Skyactiv diesel reliable?
On motorway use, yes. On short journeys it suffers from oil dilution and carbon build-up.
What check catches oil dilution?
An oil level above maximum. That is diesel in the sump and it needs addressing.
Estate or saloon?
The Tourer estate sells faster and holds a premium in the UK market.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.