Does the Jaguar XJS fail the MOT on noise, emissions and leaks more than it should?
The Jaguar XJS records 4.95 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 7.47 expected for a car of the same age mix: less than expected for its class and age (−2.52, 95% interval −2.89 to −2.15). It ranks 578 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 Jaguar XJS by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Jaguar XJS is “Emissions levels exceed default limits”, recorded 451 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Emissions levels exceed default limits | 451 | 2.17 |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 151 | 0.73 |
| Emissions levels exceed the manufacturer's specified limits | 131 | 0.63 |
| Emissions test unable to be completed | 95 | 0.46 |
| Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users | 94 | 0.45 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 20,814 (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 Jaguar XJS gets a noise, emissions and leaks advisory, how often does it fail next time?
4.8% of Jaguar XJS MOTs with a noise, emissions and leaks advisory were followed by a fail in the same group at the next MOT, typically 12.2 months and 396 miles later (2,131 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 2,131 (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
Jaguar XJS by postcode area · Jaguar XJS body, chassis and structure failures · Jaguar XJS brakes failures · Jaguar XJS vehicle identification failures · Jaguar XJS lamps, reflectors and electrics failures · Jaguar XJS road wheels failures · Jaguar XJS seat belts and airbags failures · Jaguar XJS steering failures · Jaguar XJS suspension failures · Jaguar XJS tyres failures · Jaguar XJS visibility failures