2018 Porsche macan — MOT failures & pass rate
Across 20,595 MOT tests analysed for the 2018 Porsche macan, the most common recorded failure areas were tyres, lighting & signalling and brakes. Its pass rate of 94.5% was above the average for mid-size SUVs of a similar age (89.9%). Higher-mileage examples failed more often — 14.7% in the 90-120k group versus 4.4% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.6% | 735 |
| 2 | Lighting & signalling | 1.5% | 301 |
| 3 | Brakes | 0.7% | 151 |
| 4 | Visibility | 0.6% | 124 |
| 5 | Other defects | 0.4% | 80 |
| 6 | Body, structure & corrosion | 0.3% | 62 |
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 | 354 |
| 2 | Headlamp aim | 248 |
| 3 | Brake pads | 149 |
| 4 | Registration plates | 128 |
| 5 | Washers | 81 |
| 6 | Tyre pressure monitoring system | 73 |
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 | 16.8% | 3,449 |
| 2 | Brakes | 6.6% | 1,357 |
| 3 | Other defects | 4.8% | 993 |
| 4 | Visibility | 2.2% | 455 |
| 5 | Suspension | 1.9% | 397 |
| 6 | Emissions & environmental | 0.8% | 174 |
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 | 8,376 | 4.4% |
| 30-60k | 9,788 | 5.7% |
| 60-90k | 2,147 | 8.1% |
| 90-120k | 252 | 14.7% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 18,488 | 5.4% |
| Diesel | 2,107 | 6.9% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 4,140 | 5.3% |
| 2022 | 4,200 | 4.7% |
| 2023 | 4,098 | 4.6% |
| 2024 | 4,031 | 6.2% |
| 2025 | 4,126 | 6.9% |
What to check before buying a 2018 macan
Before buying a 2018 Porsche macan, focus on the areas it most often fails on. Tyres accounted for 3.6% of tests for this year.
- Tyres (3.6% 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 (1.5% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (0.7% 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 2018 Porsche macans pass their MOT?
94.5% of the 20,595 2018 Porsche macan MOT tests in this dataset passed — a 5.5% fail rate.
What is the most common MOT failure on a 2018 Porsche macan?
Tyres, recorded in 3.6% of tests, followed by lighting & signalling (1.5%).
Does the 2018 macan get worse with mileage?
Its MOT fail rate rises from 4.4% in the 0-30k band to 14.7% in the 90-120k band.
Methodology & source. Based on 20,595 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.