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Renault Megane exhaust, emissions and leaks problems

DVSA MOT tests 2022–2025 · 49,487 MOT tests · Updated

At 13 years, 3.4 in 100 MOT tests of the Renault Megane failed on exhaust, emissions and leaks, against 4.3 for all class 4 vehicles the same age (all test years; 49,487 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), 1,702 MOT tests with a fail
  • By age: seen at 22 ages from 3 to 24 years, 441,407 MOT tests
  • MOT tests at 13 years: 49,487 for the Renault Megane

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

What the MOT tests show

What we know

3.4 fails per 100 MOT tests at 13 years, against 4.3 for all class 4 vehicles tested at 13 (all test years). That is about average.

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.

Renault Megane exhaust, emissions and leaks fails by age

Renault Megane exhaust, emissions and leaks fails per 100 MOT tests by ageSolid line: the Renault Megane. Dashed line: all cars the same age. The table below lists every value.02463 years: 0.8 per 100 (all cars 0.5), 5,772 MOT tests34 years: 1.4 per 100 (all cars 0.7), 6,561 MOT tests5 years: 1.0 per 100 (all cars 1.0), 10,480 MOT tests56 years: 1.5 per 100 (all cars 1.3), 14,257 MOT tests7 years: 1.5 per 100 (all cars 1.7), 18,443 MOT tests78 years: 1.6 per 100 (all cars 2.1), 23,815 MOT tests9 years: 2.2 per 100 (all cars 2.4), 26,449 MOT tests910 years: 2.9 per 100 (all cars 2.8), 30,857 MOT tests11 years: 3.0 per 100 (all cars 3.2), 38,599 MOT tests1112 years: 3.4 per 100 (all cars 3.7), 48,760 MOT tests13 years: 3.4 per 100 (all cars 4.3), 49,487 MOT tests1314 years: 3.5 per 100 (all cars 5.1), 45,306 MOT tests15 years: 3.6 per 100 (all cars 5.7), 38,570 MOT tests1516 years: 3.5 per 100 (all cars 6.2), 26,501 MOT tests17 years: 3.8 per 100 (all cars 6.5), 18,629 MOT tests1718 years: 4.4 per 100 (all cars 6.8), 12,631 MOT tests19 years: 4.8 per 100 (all cars 7.0), 7,300 MOT tests1920 years: 4.5 per 100 (all cars 7.0), 5,920 MOT tests21 years: 4.6 per 100 (all cars 7.1), 5,001 MOT tests2122 years: 5.4 per 100 (all cars 7.0), 3,877 MOT tests23 years: 4.8 per 100 (all cars 6.9), 2,799 MOT tests2324 years: 5.9 per 100 (all cars 7.0), 1,393 MOT tests
Fails per 100 MOT tests by age, all first-use years pooled. Renault Megane All class 4 vehicles the same age Shaded: over 18 years, survivors only.
AgeMOT testsFails per 100All class 4 vehicles the same age
35,7720.80.5
46,5611.40.7
510,4801.01.0
614,2571.51.3
718,4431.51.7
823,8151.62.1
926,4492.22.4
1030,8572.92.8
1138,5993.03.2
1248,7603.43.7
1349,4873.44.3
1445,3063.55.1
1538,5703.65.7
1626,5013.56.2
1718,6293.86.5
1812,6314.46.8
19*7,3004.87.0
20*5,9204.57.0
21*5,0014.67.1
22*3,8775.47.0
23*2,7994.86.9
24*1,3935.97.0

All first-use years of the Renault Megane pooled at each age, against all class 4 vehicles at that age over all 2022–2025 test years. * Only survivors are still tested at this age.

What fails in the exhaust, emissions and leaks at 13 years

Advisories (not fails)

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By engine and fuel

  • 1.5 diesel: 4.5 per 100 at 13 years, about average for diesel class 4 vehicles the same age (all test years; 20,469 MOT tests)
  • 1.6 petrol: 2.5 per 100 at 13 years, fails less often than petrol class 4 vehicles the same age (0.5–0.6×) (all test years; 20,365 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 Renault Megane, not the average

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

Other Renault Megane problems

Exhaust, emissions and leaks on rival models

Questions people ask

Does the Renault Megane have more exhaust, emissions and leaks problems than other cars?

3.4 in 100 MOT tests at 13 years, against 4.3 for all class 4 vehicles the same age: about average by our test (all test years; 49,487 MOT tests).

How common are Renault Megane exhaust, emissions and leaks problems?

3.4 in 100 MOT tests at 13 years failed on exhaust, emissions and leaks, against 4.3 for all class 4 vehicles the same age (all test years; 49,487 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, 441,407 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