Is the Mazda CX-5 2017–2022 reliable?
The Mazda CX-5 Mk2 (2017–2022) is the answer to the question "which used SUV is actually reliable?" In Which? reliability surveys, owner satisfaction data, and real-world ownership records, the CX-5 consistently outperforms every rival in this segment. The SKYACTIV engines are straightforward, the build quality is excellent, and major failures are genuinely rare.
The trade-off is price — a CX-5 costs more than an equivalent Qashqai or Tucson and holds its value better, which means you pay more used. It's also less common than Korean or European rivals, so finding a good example takes more patience.
There are very few genuine horror stories about CX-5 ownership. The faults that do exist are minor compared to the DSG failures, timing chain issues, and DPF problems that affect most of its rivals.
Known faults — what to watch for
These are the issues that come up repeatedly in owner forums, Which? reliability surveys, and DVLA MOT data. Not every car will have them — but every buyer should ask about them.
Diesel engine rattle on cold start
The 2.2-litre SKYACTIV-D diesel engine produces a characteristic rattling noise on cold start that alarms many buyers. This is normal for this engine design and not a sign of mechanical failure. It settles within a minute or two of running. Buyers who don't know about it sometimes reject perfectly good cars — and sellers sometimes use it to negotiate down unfairly.
Normal characteristic — not a faultDiesel DPF on short journeys
As with all modern diesels, the CX-5's DPF requires regular motorway runs to regenerate properly. Urban-only use will eventually block the filter. The CX-5 is no more susceptible than rivals but the issue is the same. Ask about typical use on any diesel example.
Medium risk for urban dieselMZD Connect infotainment lag
The MZD Connect infotainment system is controlled by a rotary dial rather than a touchscreen — which Mazda owners either love or find frustrating. The system can be laggy on older software versions. A software update usually improves responsiveness significantly. Test it at the viewing.
Low riskMinor paint chip susceptibility
Mazda's Soul Red Crystal and Machine Grey metallic paints are stunning but the finish can be susceptible to stone chips on motorway driving. This is a cosmetic issue but worth noting on any high-mileage example. Check the bonnet and front bumper carefully.
Low risk — cosmeticAWD rear differential service
Four-wheel drive CX-5 models require periodic rear differential fluid changes — often overlooked at independent garages. Check the service history for differential fluid changes at the correct intervals. The same fluid specification issue that affects the Honda CR-V applies here.
Low risk if serviced correctlyDon't buy blind — check the car's full history first
Finance owing, previous write-offs, and clocked mileage won't show up on a visual inspection.
Check this car's history — £9.99 →MOT failure patterns
We analyse real DVLA MOT records across thousands of UK-registered examples. The data below reflects actual test outcomes — not manufacturer claims.
| Failure item | How common | What it means |
|---|---|---|
| Tyre wear | CX-5 tyres on larger rims. £100–£160 each. Check all four including age. | |
| Brake disc wear | Discs wear faster on AWD models due to weight. Budget £250–£380 for fronts. | |
| Wiper blade condition | Often neglected. Check both front and rear. | |
| Suspension bushes | Rarer than on European rivals — testament to build quality. Appears on very high mileage cars only. | |
| DPF warning (diesel) | Less common than on rivals but check before any diesel purchase. |
Pro tip: The CX-5 has a genuinely better MOT pass rate than most SUV rivals — don't be surprised if the MOT history is cleaner than you're used to seeing. That's normal for this car, not a sign that something has been hidden.
The Honda CR-V is the closest reliability equivalent — both are significantly more reliable than European or Korean rivals. The Kia Sportage is cheaper but carries more mechanical risk.
What should you pay?
CX-5 holds its value unusually well — don't expect the same depreciation as a Qashqai or Tucson. The premium is justified by the reliability record.
What to check at the viewing
- Petrol or diesel? The diesel cold-start rattle is normal — don't be put off by it.
- On diesel, ask about typical use — DPF risk on urban-only driving.
- On AWD models, verify rear differential fluid has been changed at correct intervals.
- Test MZD Connect infotainment — rotary control, navigation, Bluetooth.
- Check bonnet and front bumper for stone chip damage on high-mileage cars.
- Full Mazda service history — the CX-5 is one car where missing service stamps are a genuine red flag because good examples always have them.
- Check all four tyres for condition and matching brand.
- Listen for any unusual noise from the AWD system on cornering.
The used SUV you buy when reliability is non-negotiable
The Mazda CX-5 2017–2022 is the most reliably reliable used SUV in this segment. If you've been burned by a DSG failure, a timing chain, or a DPF bill on a previous car, the CX-5 is the antidote. You'll pay more for it — the premium over a Qashqai or Tucson is real — but you're buying genuine peace of mind backed by the reliability data. The diesel cold-start rattle is normal. Everything else is very unlikely to go wrong. Run a full check before buying — CX-5s carry finance in proportion to their higher purchase price.
Frequently asked questions
Is the Mazda CX-5 the most reliable used SUV?
Based on Which? surveys and owner data, yes — the CX-5 consistently tops reliability rankings in its class. It outperforms the Qashqai, Tucson, Sportage, and most European rivals on owner-reported problems and workshop visits.
Is the Mazda CX-5 diesel noisy?
The 2.2 SKYACTIV-D diesel produces a characteristic rattle on cold start that sounds alarming but is completely normal for this engine. It settles quickly once warm. Don't reject a good example based on this noise — it's a design characteristic, not a fault.
Is the Mazda CX-5 expensive to maintain?
More expensive than a Qashqai but less expensive than a Mercedes or BMW. Service costs at Mazda dealers are reasonable and independent specialists can service them for less. Parts availability is good. Overall running costs sit between Korean rivals and premium German brands.