2017 Peugeot 508 — MOT failures & pass rate
Across 2,683 MOT tests, the 2017 Peugeot 508 recorded an 86.3% pass rate. That is effectively the same as large family cars of a similar age (13.7% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in tyres, lighting & signalling and brakes.
What the MOT record shows
No single area dominates — tyres (5.6%) and lighting & signalling (5.3%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are tread depth, brake pads and registration plate lamp(s) — tread depth alone was recorded 115 times.
A 150k+ example is materially riskier than a 0-30k one: 18.3% versus 7.6%.
Tyres is the most common advisory, noted on 25.2% of tests — work that passed today but is likely due soon.
The trend is worsening — 10.8% of tests failed in 2021 against 16.1% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.6% | 151 |
| 2 | Lighting & signalling | 5.3% | 142 |
| 3 | Brakes | 4.0% | 106 |
| 4 | Body, structure & corrosion | 2.6% | 69 |
| 5 | Suspension | 2.1% | 55 |
| 6 | Visibility | 1.8% | 49 |
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 | 115 |
| 2 | Brake pads | 78 |
| 3 | Registration plate lamp(s) | 76 |
| 4 | Joints | 70 |
| 5 | Headlamp aim | 58 |
| 6 | Coil spring | 34 |
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 | 25.2% | 675 |
| 2 | Brakes | 16.8% | 451 |
| 3 | Lighting & signalling | 6.7% | 179 |
| 4 | Other defects | 5.1% | 136 |
| 5 | Suspension | 4.7% | 125 |
| 6 | Emissions & environmental | 3.9% | 105 |
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 | 419 | 7.6% |
| 30-60k | 984 | 12.9% |
| 60-90k | 713 | 14.7% |
| 90-120k | 311 | 18.0% |
| 120-150k | 152 | 18.4% |
| 150k+ | 104 | 18.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 536 | 10.8% |
| 2022 | 519 | 10.4% |
| 2023 | 557 | 16.0% |
| 2024 | 538 | 14.9% |
| 2025 | 533 | 16.1% |
What to check before buying a 2017 508
The failure pattern for this year is specific enough to inspect against: tyres accounted for 5.6% of tests. Start there.
- Tyres (5.6% 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.
- Lighting & signalling (5.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (4.0% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2017 Peugeot 508s pass their MOT?
86.3% of the 2,683 2017 Peugeot 508 MOT tests in this dataset passed — a 13.7% fail rate.
What is the most common MOT failure on a 2017 Peugeot 508?
Tyres, recorded in 5.6% of tests, followed by lighting & signalling (5.3%).
Does the 2017 508 get worse with mileage?
Its MOT fail rate rises from 7.6% in the 0-30k band to 18.3% in the 150k+ band.
Methodology & source. Based on 2,683 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.