ExhaustHigh
DPF blockage on short journey diesels
- Typically appears
- 60,000+ miles
- What to inspect
- Run to full temperature and check for warnings
- Typical repair
- DPF forced regen or replacement · £250–£1,600
Is the 2015–2022 Mazda CX-3 reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
6.0/ 10
MixedOn our documented-fault scoring the Mazda CX-3 rates 6.0 out of 10 · mixed. We hold 8 known faults for it and 1 are rated high severity, so the risk is real but contained. The weak points cluster around exhaust, body and engine. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.
Verdict · Negotiate · budget for the known faults
What the score is built from
- Critical
- 0
- High
- 1
- Medium
- 4
- Low
- 3
Weak points cluster around exhaust, body, engine, suspension.
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Build the inspection planThe faults that decide it
BodyMedium
Corrosion around the arches on older cars
- Typically appears
- Age-related
- What to inspect
- Probe the arches and door bottoms
- Typical repair
- Body & corrosion repair · £250–£1,800
Climate ControlMedium
A/C blows warm air due to condenser failure from stone damage or internal corrosion.
- Typically appears
- 40,000-70,000 miles
- What to inspect
- Turn A/C to maximum cold. Check if the compressor clutch engages and vents blow ice cold within 60 seconds. Shine a torch through the lower front grille to check the condenser fins for oily residue or heavy stone damage.
- Typical repair
- Clutch & dual-mass flywheel · £700–£1,600
Interior ElectronicsMedium
MZD Connect infotainment screen suffers from 'ghost touch' or visible delamination under the glass.
- Typically appears
- 30,000-60,000 miles
- What to inspect
- Turn on the ignition and leave the screen on the navigation map without touching the rotary dial. Watch for erratic, unprompted menu changes. Inspect the screen surface at an angle for spiderweb-like crazing or bubbling.
- Typical repair
- Infotainment repair or software fix · £120–£1,200
TransmissionMedium
Notchy shifting or difficulty engaging 1st and 2nd gear on manual models, indicating premature synchro wear.
- Typically appears
- 60,000-100,000 miles
- What to inspect
- With the engine running and clutch fully depressed, cycle the gear stick from 1st to 2nd gear several times. Feel for excessive mechanical resistance, crunching, or a baulking sensation compared to selecting 3rd or 4th gear.
- Typical repair
- Clutch & dual-mass flywheel · £700–£1,600
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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