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Common problems by part

MG 6 exhaust, emissions and leaks problems

DVSA MOT tests 2022–2025 · 1,587 MOT tests · Updated

At 10 years, 3.0 in 100 MOT tests of the MG 6 failed on exhaust, emissions and leaks, against 2.8 for all class 4 vehicles the same age (all test years; 1,587 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), 47 MOT tests with a fail
  • By age: seen at 4 ages from 8 to 11 years, 5,526 MOT tests
  • Most common fail: Malfunction indicator lamp: inoperative or indicates a malfunction, 1.4 per 100 MOT tests

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

What the MOT tests show

What we know

3.0 fails per 100 MOT tests at 10 years, against 2.8 for all class 4 vehicles tested at 10 (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.

MG 6 exhaust, emissions and leaks fails by age

MG 6 exhaust, emissions and leaks fails per 100 MOT tests by ageSolid line: the MG 6. Dashed line: all cars the same age. The table below lists every value.0248 years: 1.5 per 100 (all cars 2.1), 1,219 MOT tests89 years: 3.7 per 100 (all cars 2.4), 1,370 MOT tests910 years: 3.0 per 100 (all cars 2.8), 1,587 MOT tests1011 years: 2.7 per 100 (all cars 3.2), 1,350 MOT tests11
Fails per 100 MOT tests by age, all first-use years pooled. MG 6 All class 4 vehicles the same age
AgeMOT testsFails per 100All class 4 vehicles the same age
81,2191.52.1
91,3703.72.4
101,5873.02.8
111,3502.73.2

All first-use years of the MG 6 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 10 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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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

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 MG 6, not the average

The figures here describe MG 6 cars as a group. These free tools answer for one car. Each line says what the tool reads.

  • Check an MG 6's MOT history Every MOT test, fail item, advisory and mileage reading DVSA holds for that registration.
  • MOT advisory checker Paste an advisory or defect to read DVSA's wording, its grade and what tends to happen at the next MOT.

Other MG 6 problems

Exhaust, emissions and leaks on rival models

Questions people ask

Does the MG 6 have more exhaust, emissions and leaks problems than other cars?

3.0 in 100 MOT tests at 10 years, against 2.8 for all class 4 vehicles the same age: about average by our test (all test years; 1,587 MOT tests).

How common are MG 6 exhaust, emissions and leaks problems?

3.0 in 100 MOT tests at 10 years failed on exhaust, emissions and leaks, against 2.8 for all class 4 vehicles the same age (all test years; 1,587 MOT tests).

What is the most common MG 6 exhaust, emissions and leaks fail?

1.4 in 100 MOT tests at 10 years: Malfunction indicator lamp: inoperative or indicates a malfunction (23 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, 5,526 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