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

Running costs, common problems, and reliability data based on 73 real MOT tests in 2024.

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MOT Pass Rate

96%

Total Tests (2024)

73

Avg Mileage

27,478 mi

Est. Annual Cost

£1,350

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

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 3 years old, 96% of DS DS7 C-BACK PFRMNC LN B-HDI S/Ss from 2021 passed their MOT first time in 2024. That's based on 73 tests across the UK. The average mileage at this age is 27,478 miles.

How does the 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S compare?

Rank among all 2021 cars685th out of 3,373(top 20%)
Rank among all DS models6th out 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

The average 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S has 27,478 miles on the clock, 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.

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

⛽Fuel (Diesel, 1499cc)
£905
🏛️Road Tax
£190
🔧MOT Test
£55
🛠️Predicted Repairs
£200
Total per year£1,350
Per month£113/mo

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.

DS DS7 C-BACK PFRMNC LN B-HDI S/S by Year

YearPass RateTestsAvg Mileage
202196%7327,478 mi
202090%16439,499 mi
201989%16751,477 mi
201886%43050,661 mi

Checking a specific DS DS7 C-BACK PFRMNC LN B-HDI S/S?

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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 2024, 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 3 years old, DS DS7 C-BACK PFRMNC LN B-HDI S/S owners cover more miles than the average 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).

What does it cost to own a 2021 DS DS7 C-BACK PFRMNC LN B-HDI S/S?

Total estimated annual running cost is £1,350 (£113/month), broken down as £905 fuel, £190 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 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. Note: with only 73 tests in our data, these figures should be treated as indicative rather than definitive.

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

The DS DS7 C-BACK PFRMNC LN B-HDI S/S is actually the most reliable option among similar diesel small family cars from this era. Here are comparable diesel cars with similar engines: