Porsche Taycan 4S 79Kwh MOT pass rate & common failures
Across 4 model years and 2,018 tests, the Porsche Taycan 4S 79Kwh passes its MOT 92.7% of the time. All cars of a similar age fail 9.0% of the time, so this is 1.7pp better than the group it competes with. Its most common failure areas are tyres, lighting & signalling and other defects.
What the MOT record shows
Tyres dominates the failure mix at 6.0% of all tests — 4.9 points clear of lighting & signalling, so it is the first thing to check.
At component level the recurring items are registration plates, headlamp aim and tread depth — registration plates alone was recorded 27 times.
Condition tracks the odometer closely. Failures run at 5.8% in the 0-30k band and 12.1% in the 60-90k band, a 6.3-point spread — more than double.
Advisories point at the next bill rather than this one: tyres was flagged on 20.5% of tests without failing them.
How it compares
By model year
Every Taycan 4S 79Kwh model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 2020 | 1,162 | 92.6% | 7.4% | Tyres |
| 2021 | 561 | 92.5% | 7.5% | Tyres |
| 2022 | 288 | 93.1% | 6.9% | Tyres |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 6.0% | 121 |
| 2 | Lighting & signalling | 1.1% | 22 |
| 3 | Other defects | 0.8% | 16 |
| 4 | Visibility | 0.6% | 13 |
| 5 | Brakes | 0.4% | 9 |
| 6 | Suspension | 0.2% | 4 |
| 7 | Road wheels | 0.1% | 3 |
| 8 | Seat belts & restraints | 0.1% | 2 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Registration plates | 27 |
| 2 | Headlamp aim | 20 |
| 3 | Tread depth | 15 |
| 4 | Washers | 8 |
| 5 | Tyre pressure monitoring system | 6 |
| 6 | Ball joint | 4 |
| 7 | Windscreen | 3 |
| 8 | Service brake performance | 2 |
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 | 20.5% | 414 |
| 2 | Other defects | 4.3% | 86 |
| 3 | Visibility | 1.8% | 37 |
| 4 | Brakes | 1.3% | 26 |
| 5 | Lighting & signalling | 0.4% | 9 |
| 6 | Road wheels | 0.4% | 8 |
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 | 1,260 | 5.8% |
| 30-60k | 695 | 9.8% |
| 60-90k | 58 | 12.1% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 389 | 6.4% |
| 2024 | 676 | 8.1% |
| 2025 | 953 | 7.1% |
What to check before buying a Porsche Taycan 4S 79Kwh
- Tyres (6.0% 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 (1.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Other defects (0.8% 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
What is the MOT pass rate for the Porsche Taycan 4S 79Kwh?
92.7% of the 2,018 Porsche Taycan 4S 79Kwh MOT tests in this dataset passed, a 7.3% fail rate, across model years 2020–2023.
What does the Porsche Taycan 4S 79Kwh most often fail its MOT on?
Tyres, recorded in 6.0% of tests, then lighting & signalling (1.1%).
How much does mileage affect Taycan 4S 79Kwh MOT results?
Fail rates run at 5.8% for cars in the 0-30k band and 12.1% for 60-90k, a 6.3-point difference.
Methodology & source. Based on 2,018 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.