Does the Lexus SC fail the MOT on noise, emissions and leaks more than it should?
The Lexus SC records 6.83 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 9.12 expected for a car of the same age mix: less than expected for its class and age (−2.29, 95% interval −2.84 to −1.73). It ranks 562 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 Lexus SC by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Lexus SC is “Engine MIL illuminated indicating a malfunction”, recorded 328 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Engine MIL illuminated indicating a malfunction | 328 | 2.90 |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 220 | 1.95 |
| An induction or exhaust leak that could affect emissions levels | 67 | 0.59 |
| Emissions test unable to be completed | 57 | 0.50 |
| Emissions levels exceed default limits | 56 | 0.50 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 11,295 (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
Other pages for this model
Lexus SC by postcode area · Lexus SC body, chassis and structure failures · Lexus SC brakes failures · Lexus SC vehicle identification failures · Lexus SC lamps, reflectors and electrics failures · Lexus SC steering failures · Lexus SC suspension failures · Lexus SC tyres failures · Lexus SC visibility failures