2014 Porsche 911 — MOT failures & pass rate
Across 8,189 MOT tests, the 2014 Porsche 911 recorded a 95.0% pass rate. That is 8.2 percentage points better than coupes & convertibles of a similar age, which fail at 13.2%. Failures cluster in tyres, lighting & signalling and visibility.
What the MOT record shows
No single area dominates — tyres (2.4%) and lighting & signalling (1.3%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, registration plates and tread depth — headlamp aim alone was recorded 87 times.
Condition tracks the odometer closely. Failures run at 3.4% in the 0-30k band and 10.3% in the 90-120k band, a 6.9-point spread — more than double.
Tyres is the most common advisory, noted on 12.5% of tests — work that passed today but is likely due soon.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 2.4% | 197 |
| 2 | Lighting & signalling | 1.3% | 108 |
| 3 | Visibility | 0.9% | 76 |
| 4 | Other defects | 0.6% | 49 |
| 5 | Suspension | 0.4% | 35 |
| 6 | Emissions & environmental | 0.4% | 32 |
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 | 87 |
| 2 | Registration plates | 75 |
| 3 | Tread depth | 67 |
| 4 | Washers | 62 |
| 5 | Catalyst emissions | 26 |
| 6 | Coil spring | 25 |
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% | 1,025 |
| 2 | Brakes | 4.3% | 350 |
| 3 | Other defects | 2.3% | 189 |
| 4 | Suspension | 1.6% | 132 |
| 5 | Visibility | 1.6% | 130 |
| 6 | Emissions & environmental | 0.6% | 47 |
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 | 4,140 | 3.4% |
| 30-60k | 3,382 | 5.8% |
| 60-90k | 578 | 10.7% |
| 90-120k | 58 | 10.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 1,724 | 5.1% |
| 2022 | 1,644 | 4.7% |
| 2023 | 1,631 | 4.5% |
| 2024 | 1,610 | 5.5% |
| 2025 | 1,580 | 5.2% |
What to check before buying a 2014 911
The failure pattern for this year is specific enough to inspect against: tyres accounted for 2.4% of tests. Start there.
- Tyres (2.4% 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 (1.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (0.9% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
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 2014 Porsche 911s pass their MOT?
95.0% of the 8,189 2014 Porsche 911 MOT tests in this dataset passed — a 5.0% fail rate.
What is the most common MOT failure on a 2014 Porsche 911?
Tyres, recorded in 2.4% of tests, followed by lighting & signalling (1.3%).
Does the 2014 911 get worse with mileage?
Its MOT fail rate rises from 3.4% in the 0-30k band to 10.3% in the 90-120k band.
Methodology & source. Based on 8,189 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.