2021 Hyundai I30 N Line Mhev T-Gdi — MOT failures & pass rate
Across 812 MOT tests analysed for the 2021 Hyundai I30 N Line Mhev T-Gdi, the most common recorded failure areas were tyres, visibility and emissions & environmental. Its pass rate of 88.3% was below the average for cars of a similar age (91.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 6.2% | 50 |
| 2 | Visibility | 4.6% | 37 |
| 3 | Emissions & environmental | 1.8% | 15 |
| 4 | Lighting & signalling | 1.2% | 10 |
| 5 | Body, structure & corrosion | 1.1% | 9 |
| 6 | Brakes | 0.5% | 4 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 36 |
| 2 | Tread depth | 25 |
| 3 | Catalyst emissions | 16 |
| 4 | Headlamp aim | 11 |
| 5 | Exhaust system | 8 |
| 6 | Washers | 6 |
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 | 23.8% | 193 |
| 2 | Brakes | 12.9% | 105 |
| 3 | Other defects | 6.8% | 55 |
| 4 | Suspension | 6.4% | 52 |
| 5 | Visibility | 3.8% | 31 |
| 6 | Body, structure & corrosion | 1.7% | 14 |
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 | 501 | 12.4% |
| 30-60k | 289 | 10.4% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Hybrid | 667 | 12.0% |
| Petrol | 145 | 10.3% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 404 | 12.9% |
| 2025 | 401 | 10.7% |
What to check before buying a 2021 I30 N Line Mhev T-Gdi
Before buying a 2021 Hyundai I30 N Line Mhev T-Gdi, focus on the areas it most often fails on. Tyres accounted for 6.2% of tests for this year.
- Tyres (6.2% 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.
- Visibility (4.6% 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.
- Emissions & environmental (1.8% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
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 2021 Hyundai I30 N Line Mhev T-Gdis pass their MOT?
88.3% of the 812 2021 Hyundai I30 N Line Mhev T-Gdi MOT tests in this dataset passed — a 11.7% fail rate.
What is the most common MOT failure on a 2021 Hyundai I30 N Line Mhev T-Gdi?
Tyres, recorded in 6.2% of tests, followed by visibility (4.6%).
Does the 2021 I30 N Line Mhev T-Gdi get worse with mileage?
Its MOT fail rate rises from 12.4% in the 0-30k band to 10.4% in the 30-60k band.
Methodology & source. Based on 812 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.