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Hyundai i20 exhaust, emissions and leaks problems

DVSA MOT tests 2022–2025 · 52,995 MOT tests · Updated

At 9 years, 1.9 in 100 MOT tests of the Hyundai i20 failed on exhaust, emissions and leaks, against 2.4 for all class 4 vehicles the same age (all test years; 52,995 MOT tests) [1].

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  • Against all class 4 vehicles the same age: about average for all class 4 vehicles the same age (all test years), 1,000 MOT tests with a fail
  • By age: seen at 14 ages from 3 to 16 years, 511,594 MOT tests
  • Most common fail: Malfunction indicator lamp: inoperative or indicates a malfunction, 1.2 per 100 MOT tests

Figures are for the model as a whole, not for one car.

What the MOT tests show

What we know

1.9 fails per 100 MOT tests at 9 years, against 2.4 for all class 4 vehicles tested at 9 (all test years). That is about average.

Why it matters

An exhaust, emissions and leaks fail stops the car passing until it is fixed; the most common one is rated major by DVSA.

What to check

Start the car from cold and look for smoke at the exhaust, listen for blowing joints, and look under the engine and gearbox for fresh oil or fluid drips.

Hyundai i20 exhaust, emissions and leaks fails by age

Hyundai i20 exhaust, emissions and leaks fails per 100 MOT tests by ageSolid line: the Hyundai i20. Dashed line: all cars the same age. The table below lists every value.02463 years: 0.2 per 100 (all cars 0.5), 25,583 MOT tests34 years: 0.2 per 100 (all cars 0.7), 26,573 MOT tests5 years: 0.3 per 100 (all cars 1.0), 32,247 MOT tests56 years: 0.6 per 100 (all cars 1.3), 41,884 MOT tests7 years: 0.9 per 100 (all cars 1.7), 47,378 MOT tests78 years: 1.3 per 100 (all cars 2.1), 51,949 MOT tests9 years: 1.9 per 100 (all cars 2.4), 52,995 MOT tests910 years: 2.6 per 100 (all cars 2.8), 48,881 MOT tests11 years: 3.0 per 100 (all cars 3.2), 45,776 MOT tests1112 years: 3.1 per 100 (all cars 3.7), 42,754 MOT tests13 years: 2.9 per 100 (all cars 4.3), 39,831 MOT tests1314 years: 2.6 per 100 (all cars 5.1), 28,900 MOT tests15 years: 2.8 per 100 (all cars 5.7), 18,333 MOT tests1516 years: 2.6 per 100 (all cars 6.2), 8,510 MOT tests
Fails per 100 MOT tests by age, all first-use years pooled. Hyundai i20 All class 4 vehicles the same age
AgeMOT testsFails per 100All class 4 vehicles the same age
325,5830.20.5
426,5730.20.7
532,2470.31.0
641,8840.61.3
747,3780.91.7
851,9491.32.1
952,9951.92.4
1048,8812.62.8
1145,7763.03.2
1242,7543.13.7
1339,8312.94.3
1428,9002.65.1
1518,3332.85.7
168,5102.66.2

All first-use years of the Hyundai i20 pooled at each age, against all class 4 vehicles at that age over all 2022–2025 test years.

What fails in the exhaust, emissions and leaks at 9 years

Fails

Advisories (not fails)

Diagnose engine warning light cost

Repair figures are estimates, not quotes: how we estimate repair costs.

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  • Model risks for this year and fuel
  • What similar cars did at their next MOT
  • Repairs ahead
  • Viewing checklist

See a sample report

By engine and fuel

  • 1.2 petrol: 2.0 per 100 at 9 years, about average for petrol class 4 vehicles the same age (all test years; 40,212 MOT tests)
  • 1.4 petrol: 0.5 per 100 at 9 years, about average for petrol class 4 vehicles the same age (all test years; 7,241 MOT tests)

How to check on a test drive

Start the car from cold and look for smoke at the exhaust, listen for blowing joints, and look under the engine and gearbox for fresh oil or fluid drips.

The most common advisory here in MOT records: Engine oil leaks: leak, but not excessive.

Check one Hyundai i20, not the average

The figures here describe Hyundai i20 cars as a group. These free tools answer for one car. Each line says what the tool reads.

Other Hyundai i20 problems

Exhaust, emissions and leaks on rival models

Questions people ask

Does the Hyundai i20 have more exhaust, emissions and leaks problems than other cars?

1.9 in 100 MOT tests at 9 years, against 2.4 for all class 4 vehicles the same age: about average by our test (all test years; 52,995 MOT tests).

How common are Hyundai i20 exhaust, emissions and leaks problems?

1.9 in 100 MOT tests at 9 years failed on exhaust, emissions and leaks, against 2.4 for all class 4 vehicles the same age (all test years; 52,995 MOT tests).

What is the most common Hyundai i20 exhaust, emissions and leaks fail?

1.2 in 100 MOT tests at 9 years: Malfunction indicator lamp: inoperative or indicates a malfunction (644 MOT tests with it).

Sources

  1. Driver and Vehicle Standards Agency, Anonymised MOT tests and results, 2022 to 2025. DVSA MOT data, Open Government Licence v3.0, 511,594 MOT tests. Accessed 7 Oct 2026.
  2. Office for National Statistics, Consumer price inflation, local price quotes (car repair items). ONS price quotes, series 610236. Accessed 7 Oct 2026.

Parts: against all class 4 vehicles at the same age, all 2022–2025 test years pooled, not adjusted for mileage. Breakdowns and non-MOT faults are not in this data. How we compare