MAZDA CX-5 SPORT D AUTO (2021)
Running costs, reliability data, and common problems from 187 real MOT tests.
Annual Cost
£1,695
£141/month
MOT Pass Rate
94%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 25-38
2191cc Diesel
Great Choice
94% pass rate, £1695/year to run. 12 points above average.
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Annual Running Costs
~40 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the MAZDA brand average of 81%.
At 5 years old, 94% of MAZDA CX-5 SPORT D AUTOs from 2021 passed their MOT first time in 2026. That's based on 187 tests across the UK. The average mileage at this age is 33,133 miles.
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Mileage Analysis
33,133
Average miles
37,000
Expected for age
The average 2021 MAZDA CX-5 SPORT D AUTO has 33,133 miles on the clock, which is in line with the expected 37,000 miles for a 5-year-old car, suggesting normal everyday use.
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About the 2021 MAZDA CX-5 SPORT D AUTO
The 2021 MAZDA CX-5 SPORT D AUTO is a family car with a 2191cc diesel engine. 187 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 33,133 miles at 5 years old, MAZDA CX-5 SPORT D AUTO owners drive about as much as the UK average.
2021 MAZDA CX-5 SPORT D AUTO Fuel Costs
The 2191cc diesel engine offers a reasonable balance between performance and economy. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2021 MAZDA CX-5 SPORT D AUTO?
Total estimated annual running cost is £1,695 (£141/month), broken down as £1245 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 MAZDA CX-5 SPORT D AUTO
At 5 years old, the MAZDA CX-5 SPORT D AUTO offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Common Issues to Watch For
Based on the 2021 MAZDA CX-5 SPORT D AUTO's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Medium riskDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
EGR Valve
Low riskExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
Dual Mass Flywheel
Medium riskLarger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2021 MAZDA CX-5 SPORT D AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MAZDA CX-5 SPORT D AUTO(2021) | 94% | £1245 | £195 | Grp 25-38 | £1695 |
| FORD KUGA(2019) | 91% | £1037 | £190 | Grp 18-32 | £1482-£213 |
| FORD TRANSIT CUSTOM(2019) | 87% | £1037 | £190 | Grp 18-32 | £1632-£63 |
| BMW 118(2020) | 93% | £1037 | £190 | Grp 18-32 | £1482-£213 |
| VOLKSWAGEN T-ROC(2019) | 94% | £1037 | £190 | Grp 18-32 | £1482-£213 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Mazda Models
Explore other Mazda cars or similar models in the same category.
MAZDA 2
2010 · 1349cc Petrol
MAZDA 3
2015 · 1998cc Petrol
MAZDA CX-5
2019 · 2000cc Petrol
FORD KUGA
2019 · 1997cc Diesel
FORD TRANSIT CUSTOM
2019 · 2000cc Diesel
BMW 118
2020 · 1995cc Diesel
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