DS Ds7 C-Back Pfrmnc Ln B- MOT pass rate & common failures
1,642 MOT tests on the DS Ds7 C-Back Pfrmnc Ln B- (2018–2021) give it an 85.7% pass rate. All cars of a similar age fail 10.5% of the time, so this is 3.8pp worse than the group it competes with. Its most common failure areas are lighting & signalling, tyres and suspension.
What the MOT record shows
No single area dominates — lighting & signalling (4.5%) and tyres (4.5%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are tread depth, pins and bushes and brake pads — tread depth alone was recorded 93 times.
Mileage matters less than usual here: the Ds7 C-Back Pfrmnc Ln B- fails 12.0% of the time in the 0-30k band and 14.0% at 90-120k, a spread of only 2.0 points.
Tyres is the most common advisory, noted on 21.6% of tests — work that passed today but is likely due soon.
The trend is worsening — 10.7% of tests failed in 2021 against 15.6% in 2025, the usual pattern as a fleet ages.
How it compares
By model year
Every Ds7 C-Back Pfrmnc Ln B- model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 2018 | 930 | 85.0% | 15.0% | Tyres |
| 2019 | 381 | 86.4% | 13.7% | Lighting & signalling |
| 2020 | 244 | 85.7% | 14.3% | Tyres |
| 2021 | 87 | 90.8% | 9.2% | Lighting & signalling |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 4.5% | 74 |
| 2 | Tyres | 4.5% | 74 |
| 3 | Suspension | 3.1% | 51 |
| 4 | Brakes | 2.9% | 48 |
| 5 | Visibility | 2.6% | 43 |
| 6 | Body, structure & corrosion | 1.5% | 24 |
| 7 | Emissions & environmental | 1.1% | 18 |
| 8 | Steering | 0.5% | 9 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 93 |
| 2 | Pins and bushes | 65 |
| 3 | Brake pads | 50 |
| 4 | Wipers | 34 |
| 5 | Position lamp | 28 |
| 6 | Headlamp aim | 20 |
| 7 | Joints | 17 |
| 8 | Washers | 15 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 21.6% | 354 |
| 2 | Brakes | 18.6% | 306 |
| 3 | Other defects | 6.2% | 102 |
| 4 | Body, structure & corrosion | 5.1% | 84 |
| 5 | Suspension | 2.7% | 44 |
| 6 | Visibility | 2.2% | 36 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 443 | 12.0% |
| 30-60k | 858 | 14.2% |
| 60-90k | 282 | 18.4% |
| 90-120k | 50 | 14.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 177 | 10.7% |
| 2022 | 282 | 14.9% |
| 2023 | 379 | 14.8% |
| 2024 | 400 | 13.8% |
| 2025 | 404 | 15.6% |
What to check before buying a DS Ds7 C-Back Pfrmnc Ln B-
- Lighting & signalling (4.5% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Tyres (4.5% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Suspension (3.1% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
What is the MOT pass rate for the DS Ds7 C-Back Pfrmnc Ln B-?
85.7% of the 1,642 DS Ds7 C-Back Pfrmnc Ln B- MOT tests in this dataset passed, a 14.3% fail rate, across model years 2018–2021.
What does the DS Ds7 C-Back Pfrmnc Ln B- most often fail its MOT on?
Lighting & signalling, recorded in 4.5% of tests, then tyres (4.5%).
How much does mileage affect Ds7 C-Back Pfrmnc Ln B- MOT results?
Fail rates run at 12.0% for cars in the 0-30k band and 14.0% for 90-120k, a 2.0-point difference.
Methodology & source. Based on 1,642 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.