Buying Report · £14.99
Tools

Common problems by part

Hyundai i30 exhaust, emissions and leaks problems

DVSA MOT tests 2022–2025 · 44,113 MOT tests · Updated

At 9 years, 1.1 in 100 MOT tests of the Hyundai i30 failed on exhaust, emissions and leaks, against 2.4 for all class 4 vehicles the same age (all test years; 44,113 MOT tests) [1].

Buying Report £14.99 incl. VAT · one car · no subscription · Not a mechanical inspection.

  • Against all class 4 vehicles the same age: fails less often than all class 4 vehicles the same age (0.4–0.5×) (all test years), 483 MOT tests with a fail
  • By age: seen at 15 ages from 3 to 17 years, 422,957 MOT tests
  • MOT tests at 9 years: 44,113 for the Hyundai i30

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

What the MOT tests show

What we know

1.1 fails per 100 MOT tests at 9 years, against 2.4 for all class 4 vehicles tested at 9 (all test years). The Hyundai i30 fails less often here.

Why it matters

An exhaust, emissions and leaks fail stops the car passing until it is fixed.

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 i30 exhaust, emissions and leaks fails by age

Hyundai i30 exhaust, emissions and leaks fails per 100 MOT tests by ageSolid line: the Hyundai i30. Dashed line: all cars the same age. The table below lists every value.02463 years: 1.0 per 100 (all cars 0.5), 9,060 MOT tests34 years: 0.8 per 100 (all cars 0.7), 15,047 MOT tests5 years: 0.9 per 100 (all cars 1.0), 20,116 MOT tests56 years: 1.0 per 100 (all cars 1.3), 28,220 MOT tests7 years: 1.1 per 100 (all cars 1.7), 37,898 MOT tests78 years: 1.0 per 100 (all cars 2.1), 40,311 MOT tests9 years: 1.1 per 100 (all cars 2.4), 44,113 MOT tests910 years: 1.1 per 100 (all cars 2.8), 43,387 MOT tests11 years: 1.2 per 100 (all cars 3.2), 39,161 MOT tests1112 years: 1.8 per 100 (all cars 3.7), 39,915 MOT tests13 years: 2.5 per 100 (all cars 4.3), 38,533 MOT tests1314 years: 3.1 per 100 (all cars 5.1), 31,347 MOT tests15 years: 3.1 per 100 (all cars 5.7), 21,874 MOT tests1516 years: 3.2 per 100 (all cars 6.2), 11,003 MOT tests17 years: 4.4 per 100 (all cars 6.5), 2,972 MOT tests17
Fails per 100 MOT tests by age, all first-use years pooled. Hyundai i30 All class 4 vehicles the same age
AgeMOT testsFails per 100All class 4 vehicles the same age
39,0601.00.5
415,0470.80.7
520,1160.91.0
628,2201.01.3
737,8981.11.7
840,3111.02.1
944,1131.12.4
1043,3871.12.8
1139,1611.23.2
1239,9151.83.7
1338,5332.54.3
1431,3473.15.1
1521,8743.15.7
1611,0033.26.2
172,9724.46.5

All first-use years of the Hyundai i30 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

Advisories (not fails)

Buying a Hyundai i30? Check that exact car before the viewing.

Buying Report £14.99 incl. VAT · one car · no subscription · Not a mechanical inspection.

  • 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

  • 1.6 diesel: 1.4 per 100 at 9 years, fails less often than diesel class 4 vehicles the same age (0.5–0.6×) (all test years; 27,041 MOT tests)
  • 1.4 petrol: 0.7 per 100 at 9 years, about average for petrol class 4 vehicles the same age (all test years; 13,033 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 i30, not the average

The figures here describe Hyundai i30 cars as a group. These free tools answer for one car. Each line says what the tool reads.

Other Hyundai i30 problems

Exhaust, emissions and leaks on rival models

Questions people ask

Does the Hyundai i30 have more exhaust, emissions and leaks problems than other cars?

0.4 to 0.5 times the exhaust, emissions and leaks fail rate of all class 4 vehicles the same age at 9 years (all test years), from 44,113 MOT tests. The interval is clear of 0.8 in the same direction at 11 of the 15 ages seen (ages up to 18 with at least 100 MOT tests with a fail).

How common are Hyundai i30 exhaust, emissions and leaks problems?

1.1 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; 44,113 MOT tests).

Sources

  1. Driver and Vehicle Standards Agency, Anonymised MOT tests and results, 2022 to 2025. DVSA MOT data, Open Government Licence v3.0, 422,957 MOT tests. 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