How much does a 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S cost to run?

Estimated annual running cost is £1,355 (£113/month), including £905 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S?

The 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S has a 96% MOT pass rate based on 73 tests in 2026. This ranks 685 out of 3373 cars from 2021.

Which year DS DS7 C-BACK PFRMNC LN B-HDI S/S is most reliable?

The 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S has the highest MOT pass rate at 96%. The least reliable year is 2018 at 86%.

DS DS7 C-BACK PFRMNC LN B-HDI S/S (2021)

Q: Is the 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S reliable?

Excellent reliability. Very few MOT failures. 96% of DS DS7 C-BACK PFRMNC LN B-HDI S/Ss from 2021 passed their MOT first time in 2026, based on 73 tests. That's 14 points above the national average of 82%.

Q: What is the average mileage for a 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S?

The average mileage for a 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S is 27,478 miles, 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.

Running costs, reliability data, and common problems from 73 real MOT tests.

Annual Cost

£1,355

£113/month

MOT Pass Rate

96%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 12-25

1499cc Diesel

Great Choice

96% pass rate, £1355/year to run. 14 points above average.

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Diesel1499cc5 years old73 tests27k miles avg

Annual Running Costs

Fuel (Diesel, 1499cc)

~55 mpg

£905

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,355

Per month£113/mo

Per week£26/wk

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

96% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 14 points above the national average of 82%. It also outperforms the DS brand average of 88%.

At 5 years old, 96% of DS DS7 C-BACK PFRMNC LN B-HDI S/Ss from 2021 passed their MOT first time in 2026. That's based on 73 tests across the UK. The average mileage at this age is 27,478 miles.

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How Does It Compare?

Rank among 2021 cars685th of 3,373(top 20%)

Rank among DS models6th of 53(top 11%)

vs national average+14%(82% avg)

vs 2021 cars average+4%(92% avg)

vs DS average+8%(88% avg)

Mileage Analysis

27,478

Average miles

37,000

Expected for age

The average 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S has 27,478 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 C-BACK PFRMNC LN B-HDI S/S by Year

Year	Pass Rate	Tests	Avg Mileage
2021	96%	73	27,478 mi
2020	90%	164	39,499 mi
2019	89%	167	51,477 mi
2018	86%	430	50,661 mi

Similar Cars to Consider

FORD FOCUS

2019 · 1499cc Diesel

£1,500/year

89%

-7%

MERCEDES A

2019 · 1461cc Diesel

£1,350/year

91%

-5%

FORD KUGA

2019 · 1997cc Diesel

£1,482/year

91%

-5%

VOLKSWAGEN POLO

2019 · 1598cc Diesel

£1,500/year

89%

-7%

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About the 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S

The 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S is a small family car with a 1499cc diesel engine. 73 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 20% of all 2021 cars for reliability.

With an average of 27,478 miles at 5 years old, DS DS7 C-BACK PFRMNC LN B-HDI S/S owners tend to use this car less than the typical driver.

2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S 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 C-BACK PFRMNC LN B-HDI S/S?

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 96% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

DS DS7 C-BACK PFRMNC LN B-HDI S/S Reliability Trend

Newer DS DS7 C-BACK PFRMNC LN B-HDI S/Ss show better MOT pass rates than older ones, with an average improvement of 6 percentage points.

Buying a Used 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S

At 5 years old, the DS DS7 C-BACK PFRMNC LN B-HDI S/S offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 73 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

Based on the 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S's fuel type, age, and engine size, these are the most likely problem areas to check.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Medium risk

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

AdBlue System

Medium risk

Post-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.

EGR Valve

Low risk

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

Service History

Low risk

Always 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 C-BACK PFRMNC LN B-HDI S/S stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
DS DS7 C-BACK PFRMNC LN B-HDI S/S(2021)	96%	£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.