ExhaustHigh
DPF blockage on short journey diesels
- Typically appears
- 60,000+ miles
- What to inspect
- Run to full temperature and check for warnings
2015–2022 Mazda CX-3 · common problems & known faults
A small crossover with strong build quality but the usual diesel emissions caveats.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed August 2026
Quick answer
The most commonly reported faults on the 2015–2022 Mazda CX-3 are DPF blockage on short journey diesels, Corrosion around the arches on older cars and Carbon build up on Skyactiv-G petrol. 1 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 CX-3.
7.9/ 10
- Critical
- 0
- High
- 1
- Medium
- 1
- Low
- 2
Guidance only · reflects reported patterns, not a specific car's condition.
Known faults to check
BodyMedium
Corrosion around the arches on older cars
- Typically appears
- Age-related
- What to inspect
- Probe the arches and door bottoms
EngineLow
Carbon build up on Skyactiv-G petrol
- Typically appears
- 70,000+ miles
- What to inspect
- Check idle quality and stored codes
SuspensionLow
Bush wear from firm ride and larger wheels
- Typically appears
- 70,000+ miles
- What to inspect
- Listen for knocks over speed bumps
Inspecting a Mazda CX-3?
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Check this exact carFrequently asked questions
Petrol or diesel?
Petrol for most buyers. The diesel suits motorway mileage only.
Is build quality good?
Yes, interiors hold up well which helps resale.
Main risk?
A blocked DPF on a low mileage urban car.
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.