DS DS7 CROSSBACK PRSTGE BHDI SS A (2021)
Running costs, reliability data, and common problems from 101 real MOT tests.
Annual Cost
£1,355
£113/month
MOT Pass Rate
97%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 12-25
1499cc Diesel
Great Choice
97% pass rate, £1355/year to run. 15 points above average.
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Annual Running Costs
~55 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 15 points above the national average of 82%. It also outperforms the DS brand average of 88%.
At 5 years old, 97% of DS DS7 CROSSBACK PRSTGE BHDI SS As from 2021 passed their MOT first time in 2026. That's based on 101 tests across the UK. The average mileage at this age is 29,389 miles.
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How Does It Compare?
Mileage Analysis
29,389
Average miles
37,000
Expected for age
The average 2021 DS DS7 CROSSBACK PRSTGE BHDI SS A has 29,389 miles on the clock, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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DS DS7 CROSSBACK PRSTGE BHDI SS A by Year
Similar Cars to Consider
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About the 2021 DS DS7 CROSSBACK PRSTGE BHDI SS A
The 2021 DS DS7 CROSSBACK PRSTGE BHDI SS A is a small family car with a 1499cc diesel engine. 101 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 12% of all 2021 cars for reliability.
With an average of 29,389 miles at 5 years old, DS DS7 CROSSBACK PRSTGE BHDI SS A owners tend to use this car less than the typical driver.
2021 DS DS7 CROSSBACK PRSTGE BHDI SS A Fuel Costs
The 1499cc diesel engine offers a reasonable balance between performance and economy. Expect around 55 mpg in mixed driving, which works out to roughly £905 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 DS DS7 CROSSBACK PRSTGE BHDI SS A?
Total estimated annual running cost is £1,355 (£113/month), broken down as £905 fuel, £195 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.
DS DS7 CROSSBACK PRSTGE BHDI SS A Reliability Trend
Newer DS DS7 CROSSBACK PRSTGE BHDI SS As show better MOT pass rates than older ones, with an average improvement of 6 percentage points.
Buying a Used 2021 DS DS7 CROSSBACK PRSTGE BHDI SS A
At 5 years old, the DS DS7 CROSSBACK PRSTGE BHDI SS A 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 DS DS7 CROSSBACK PRSTGE BHDI SS A'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.
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 DS DS7 CROSSBACK PRSTGE BHDI SS A stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| DS DS7 CROSSBACK PRSTGE BHDI SS A(2021) | 97% | £905 | £195 | Grp 12-25 | £1355 |
| FORD FOCUS(2019) | 89% | £905 | £190 | Grp 12-25 | £1500+£145 |
| MERCEDES A(2019) | 91% | £905 | £190 | Grp 12-25 | £1350-£5 |
| FORD KUGA(2019) | 91% | £1037 | £190 | Grp 18-32 | £1482+£127 |
| VOLKSWAGEN POLO(2019) | 89% | £905 | £190 | Grp 12-25 | £1500+£145 |
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 Ds Models
Explore other Ds cars or similar models in the same category.
DS DS3
2016 · 1598cc Petrol
DS DS4
2016 · 1560cc Diesel
DS DS7
2019 · 1598cc Petrol
FORD FOCUS
2019 · 1499cc Diesel
MERCEDES A
2019 · 1461cc Diesel
FORD KUGA
2019 · 1997cc Diesel
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