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 A/C blows warm air due to condenser failure from stone damage or internal corrosion. 1 of the documented issues are rated high severity · inspect these first. Full inspection points, onset mileage and what to check are listed below.
Turn these known faults into a step-by-step viewing plan for this exact Mazda CX-3 · $9.
Build the inspection planReliability snapshot
Based on the documented faults on this page for the Mazda CX-3.
6.0/ 10
- Critical
- 0
- High
- 1
- Medium
- 4
- Low
- 3
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
Turn these known faults into a step-by-step viewing plan for this exact Mazda CX-3 · $9.
Build the inspection planEngineLow
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
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.
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.
Exterior ElectricalLow
Power folding wing mirrors fail to retract or emit a continuous grinding noise due to stripped internal plastic gears.
- Typically appears
- 50,000-80,000 miles
- What to inspect
- Lock and unlock the vehicle using the key fob to trigger the auto-fold function. Listen closely to both wing mirrors for clicking or grinding noises, ensuring both sides fully extend and retract in unison.
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.
Inspecting a Mazda CX-3?
Build a tickable plan for the viewing · where to look, what a bad result means and what to ask the seller. One-off price $9.
Build my inspection planFrequently 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.
Are there any specific servicing requirements for the Skyactiv-D diesel injectors?
Yes, the 1.5 and 1.8 Skyactiv-D engines require periodic injector calibration and copper seal inspections. If the injector seals fail, carbon blows past into the oil, blocking the oil pickup strainer and starving the engine of lubrication. Ensure the service history shows regular oil changes using the correct low-ash C3 specification.
Does the CX-3 use a timing belt or a timing chain?
All engines in the UK CX-3 lineup, including the 2.0-litre Skyactiv-G petrol and the 1.5-litre or 1.8-litre Skyactiv-D diesels, utilise a timing chain rather than a cambelt. These chains are designed to last the lifetime of the vehicle and do not have a scheduled replacement interval, provided oil changes are strictly adhered to.
How practical is the boot space for family buyers?
The CX-3 is based on the Mazda 2 supermini platform, meaning boot capacity is notably restricted compared to rivals like the Nissan Juke. It offers just 350 litres, which drops further if the Bose sound system subwoofer is fitted under the boot floor. It is generally too small for bulky prams or large family luggage.
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.
More Mazda models
Buying a Mazda CX-3? Build a step-by-step viewing plan for this exact car · $9.
Build the plan