2019 Porsche 911 — MOT failures & pass rate
Across 8,714 MOT tests, the 2019 Porsche 911 recorded a 95.7% pass rate. That is 4.3 percentage points better than coupes & convertibles of a similar age, which fail at 8.6%. Failures cluster in tyres, lighting & signalling and other defects.
What the MOT record shows
No single area dominates — tyres (3.1%) and lighting & signalling (0.9%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, tread depth and registration plates — headlamp aim alone was recorded 90 times.
Condition tracks the odometer closely. Failures run at 3.8% in the 0-30k band and 10.6% in the 60-90k band, a 6.9-point spread — more than double.
Advisories point at the next bill rather than this one: tyres was flagged on 12.5% of tests without failing them.
The trend is improving — the fail rate fell from 8.8% in 2021 to 4.3% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.1% | 274 |
| 2 | Lighting & signalling | 0.9% | 76 |
| 3 | Other defects | 0.6% | 53 |
| 4 | Emissions & environmental | 0.3% | 25 |
| 5 | Visibility | 0.2% | 21 |
| 6 | Brakes | 0.2% | 17 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 90 |
| 2 | Tread depth | 85 |
| 3 | Registration plates | 83 |
| 4 | Tyre pressure monitoring system | 20 |
| 5 | Washers | 17 |
| 6 | Catalyst emissions | 16 |
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 | 12.5% | 1,093 |
| 2 | Other defects | 3.6% | 313 |
| 3 | Brakes | 1.7% | 151 |
| 4 | Visibility | 1.3% | 116 |
| 5 | Suspension | 0.9% | 83 |
| 6 | Emissions & environmental | 0.6% | 56 |
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 | 7,687 | 3.8% |
| 30-60k | 951 | 8.1% |
| 60-90k | 47 | 10.6% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 160 | 8.8% |
| 2022 | 2,300 | 4.0% |
| 2023 | 2,199 | 4.1% |
| 2024 | 1,997 | 4.3% |
| 2025 | 2,058 | 4.3% |
What to check before buying a 2019 911
On a 2019 911, tyres is what the MOT record says goes wrong most — it appeared in 3.1% of tests. Check these areas before you commit.
- Tyres (3.1% 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 (0.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Other defects (0.6% of tests): Miscellaneous items not in the main categories. Typical repair: varies.
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 2019 Porsche 911s pass their MOT?
95.7% of the 8,714 2019 Porsche 911 MOT tests in this dataset passed — a 4.3% fail rate.
What is the most common MOT failure on a 2019 Porsche 911?
Tyres, recorded in 3.1% of tests, followed by lighting & signalling (0.9%).
Does the 2019 911 get worse with mileage?
Its MOT fail rate rises from 3.8% in the 0-30k band to 10.6% in the 60-90k band.
Methodology & source. Based on 8,714 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.