Hyundai I20 vs Hyundai Sonata v6 auto: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Hyundai I20
80%
MOT pass rate · 135,974 vehicles
More reliable
Hyundai Sonata v6 auto
66%
MOT pass rate · 304 vehicles
Verdict: On MOT pass rate, the Hyundai I20 is the more reliable of the two — 80% pass first time versus 66%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Hyundai I20 | Hyundai Sonata v6 auto |
|---|---|---|
| MOT pass rate | 80% ✓ | 66% |
| MOT failure rate | 20% ✓ | 34% |
| Faults & advisories per test | 1.6 ✓ | 2.0 |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 69,554 mi | 110,709 mi |
| Sample size (vehicles) | 135,974 | 304 |
Most common faults
Hyundai I20
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
- Offside Rear Brake pipe corroded, covered in grease or other material (1.1.11 (c))
Hyundai Sonata v6 auto
- Exhaust emissions carbon monoxide content after 2nd fast idle excessive (7.3.D.3)
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre tread depth below requirements of 1.6mm (4.1.E.1)
- Parking brake: efficiency below requirements (3.7.B.7)
- Exhaust emissions Lambda reading after 2nd fast idle outside specified limits (7.3.D.3)
- Oil leak
Reliability FAQ
On MOT pass rate, the Hyundai I20 is the more reliable of the two — 80% pass first time versus 66%. It's one signal among several; check the full breakdown below.
Full Hyundai I20 report Full Hyundai Sonata v6 auto report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.