Mazda CX-5 Sport D (2021)
Estimated running costs and MOT pass rates from 338 MOT tests in 2024.
Annual Cost
£2,131
£178/month
MOT Pass Rate
97%
Excellent
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 25-38
2191cc Diesel
Great Choice
97% pass rate, £2,131/year to run. 15 points above average.
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Annual Running Costs
~40 mpg
Standard rate (from April 2017)
Low estimate due to excellent reliability
Estimates based on 7,400 miles/year (UK average), diesel at 199.33p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).
Reliability Verdict
Excellent reliability. Very few MOT failures. That's 15 points above the average of 82% across all models in our data. It also outperforms the Mazda brand average of 81%.
97% of MOT tests on Mazda CX-5 Sport Ds from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 338 tests across the UK, retests included. The average mileage recorded at those tests was 30,841 miles.
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How Does It Compare?
Mileage Analysis
30,841
Average miles
22,200
Expected for age
The average 2021 Mazda CX-5 Sport D had 30,841 miles on the clock at its 2024 MOT, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
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About the 2021 Mazda CX-5 Sport D
The 2021 Mazda CX-5 Sport D is a family car. Our records list a 2191cc diesel engine, though engines vary between versions. 338 MOT tests were recorded on this model in 2024, making it a less common model in the UK market. It ranks in the top 10% of all 2021 models for MOT pass rate.
With an average of 30,841 miles recorded at its 2024 MOT tests, Mazda CX-5 Sport D owners cover more miles than the average driver.
2021 Mazda CX-5 Sport D 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 £1,676 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; 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?
Total estimated annual running cost is £2,131 (£178/month), broken down as £1,676 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 97% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 Mazda CX-5 Sport D
At 5 years old, the Mazda CX-5 Sport D 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
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
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 stacks up against similar cars for estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| Mazda CX-5 Sport D(2021) | 97% | £1,676 | £200 | Grp 25-38 | £2,131 |
| Ford Kuga(2019) | 91% | £1,397 | £200 | Grp 18-32 | £1,852-£279 |
| BMW 118(2020) | 93% | £1,397 | £200 | Grp 18-32 | £1,852-£279 |
| Volkswagen T-Roc(2019) | 94% | £1,397 | £200 | Grp 18-32 | £1,852-£279 |
| BMW 1 Series(2019) | 91% | £1,397 | £200 | Grp 18-32 | £1,852-£279 |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2021 Mazda CX-5 Sport D
Is the 2021 Mazda CX-5 Sport D reliable?
Excellent reliability. Very few MOT failures. 97% of MOT tests on 2021 Mazda CX-5 Sport Ds ended in a pass, from 338 tests (DVSA MOT data for tests in 2024, retests included). That's 15 points above the average of 82% across all models in the same data.
How much does a 2021 Mazda CX-5 Sport D cost to run?
Our estimate is £2,131 a year (£178 a month): £1,676 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2021 Mazda CX-5 Sport D?
97% of 338 MOT tests on the 2021 Mazda CX-5 Sport D ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 325th of 3,336 models first registered in 2021 (top 10%).
Which year Mazda CX-5 Sport D has the best MOT pass rate?
Of the years with at least 100 tests, the 2021 Mazda CX-5 Sport D has the highest MOT pass rate at 97% and the 2020 the lowest at 95%. Newer cars usually pass more often simply because they are younger and have done fewer miles.
What is the average mileage for a 2021 Mazda CX-5 Sport D?
The average mileage recorded at MOT tests on the 2021 Mazda CX-5 Sport D is 30,841 miles, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Related Mazda Models
Explore other Mazda cars or similar models in the same category.
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Mazda CX-5
2019 · 2000cc Petrol
Ford Kuga
2019 · 1997cc Diesel
BMW 118
2020 · 1995cc Diesel
Volkswagen T-Roc
2019 · 1968cc Diesel
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