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Hyundai I20 vs Hyundai Ioniq: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Hyundai I20
80%
MOT pass rate · 135,974 vehicles
Hyundai Ioniq
89%
MOT pass rate · 41,731 vehicles
More reliable
Verdict: On MOT pass rate, the Hyundai Ioniq is the more reliable of the two — 89% pass first time versus 80%. It's one signal among several; check the full breakdown below.

Head to head

Measure Hyundai I20 Hyundai Ioniq
MOT pass rate 80% 89% ✓
MOT failure rate 20% 11% ✓
Faults & advisories per test 1.6 0.8 ✓
Dangerous-fault share 3% ✓ 5%
Average mileage 69,554 mi 71,434 mi
Sample size (vehicles) 135,974 41,731

Most common faults

Hyundai I20

  1. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  4. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  5. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  6. Offside Rear Brake pipe corroded, covered in grease or other material (1.1.11 (c))

Hyundai Ioniq

  1. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  4. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  5. Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  6. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate, the Hyundai Ioniq is the more reliable of the two — 89% pass first time versus 80%. It's one signal among several; check the full breakdown below.

Full Hyundai I20 report Full Hyundai Ioniq 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.