Does the Peugeot 406 fail the MOT on noise, emissions and leaks more than it should?
The Peugeot 406 records 7.98 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 10.07 expected for a car of the same age mix: less than expected for its class and age (−2.09, 95% interval −2.41 to −1.77). It ranks 550 of 678 models on noise, emissions and leaks (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on noise, emissions and leaks · check a Peugeot 406 by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Peugeot 406 is “Emissions test unable to be completed”, recorded 617 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Emissions test unable to be completed | 617 | 1.60 |
| Engine MIL illuminated indicating a malfunction | 409 | 1.06 |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 305 | 0.79 |
| Smoke opacity levels exceed default limit | 298 | 0.77 |
| Emissions levels exceed default limits | 275 | 0.71 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 38,499 (initial tests) · Method: failure items (major and minor) grouped by DVSA's defect tree; wordings with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
If a Peugeot 406 gets a noise, emissions and leaks advisory, how often does it fail next time?
8.3% of Peugeot 406 MOTs with a noise, emissions and leaks advisory were followed by a fail in the same group at the next MOT, typically 12 months and 2,998 miles later (4,266 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 4,266 (advisories followed) · Method: the same vehicles followed to their next ordinary MOT · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
Other pages for this model
Peugeot 406 1998 · Peugeot 406 1999 · Peugeot 406 2000 · Peugeot 406 2001 · Peugeot 406 2002 · Peugeot 406 2003 · Peugeot 406 2004 · Peugeot 406 in Norway · Peugeot 406 in the Netherlands · Peugeot 406 by postcode area · Peugeot 406 body, chassis and structure failures · Peugeot 406 brakes failures · Peugeot 406 vehicle identification failures · Peugeot 406 lamps, reflectors and electrics failures · Peugeot 406 road wheels failures · Peugeot 406 seat belts and airbags failures · Peugeot 406 steering failures · Peugeot 406 suspension failures · Peugeot 406 tyres failures · Peugeot 406 visibility failures