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Common problems by part

Peugeot 407 exhaust, emissions and leaks problems

DVSA MOT tests 2022–2025 · 7,988 MOT tests · Updated

At 16 years, 5.9 in 100 MOT tests of the Peugeot 407 failed on exhaust, emissions and leaks, against 6.2 for all class 4 vehicles the same age (all test years; 7,988 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), 472 MOT tests with a fail
  • By age: seen at 9 ages from 12 to 20 years, 41,389 MOT tests
  • Most common fail: Pre 01/07/2008 Turbo: emissions exceed manufacturer's specified limit, 1.6 per 100 MOT tests

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

What the MOT tests show

What we know

5.9 fails per 100 MOT tests at 16 years, against 6.2 for all class 4 vehicles tested at 16 (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.

Peugeot 407 exhaust, emissions and leaks fails by age

Peugeot 407 exhaust, emissions and leaks fails per 100 MOT tests by ageSolid line: the Peugeot 407. Dashed line: all cars the same age. The table below lists every value.024612 years: 6.7 per 100 (all cars 3.7), 1,723 MOT tests1213 years: 6.2 per 100 (all cars 4.3), 3,279 MOT tests1314 years: 6.4 per 100 (all cars 5.1), 4,590 MOT tests1415 years: 5.8 per 100 (all cars 5.7), 6,821 MOT tests1516 years: 5.9 per 100 (all cars 6.2), 7,988 MOT tests1617 years: 5.3 per 100 (all cars 6.5), 7,476 MOT tests1718 years: 5.4 per 100 (all cars 6.8), 5,407 MOT tests1819 years: 6.2 per 100 (all cars 7.0), 2,968 MOT tests1920 years: 6.7 per 100 (all cars 7.0), 1,137 MOT tests20
Fails per 100 MOT tests by age, all first-use years pooled. Peugeot 407 All class 4 vehicles the same age Shaded: over 18 years, survivors only.
AgeMOT testsFails per 100All class 4 vehicles the same age
121,7236.73.7
133,2796.24.3
144,5906.45.1
156,8215.85.7
167,9885.96.2
177,4765.36.5
185,4075.46.8
19*2,9686.27.0
20*1,1376.77.0

All first-use years of the Peugeot 407 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 16 years

Fails

Advisories (not fails)

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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 Peugeot 407, not the average

The figures here describe Peugeot 407 cars as a group. These free tools answer for one car. Each line says what the tool reads.

Other Peugeot 407 problems

Exhaust, emissions and leaks on rival models

Questions people ask

Does the Peugeot 407 have more exhaust, emissions and leaks problems than other cars?

5.9 in 100 MOT tests at 16 years, against 6.2 for all class 4 vehicles the same age: about average by our test (all test years; 7,988 MOT tests).

How common are Peugeot 407 exhaust, emissions and leaks problems?

5.9 in 100 MOT tests at 16 years failed on exhaust, emissions and leaks, against 6.2 for all class 4 vehicles the same age (all test years; 7,988 MOT tests).

What is the most common Peugeot 407 exhaust, emissions and leaks fail?

1.6 in 100 MOT tests at 16 years: Pre 01/07/2008 Turbo: emissions exceed manufacturer's specified limit (124 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, 41,389 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