2018 Lexus Is MOT pass rate: 92.9% (4,299 tests)
Is the 2018 Is getting worse?
Pass rate of 2018-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2023 | 92.6% +4.6 vs same-age |
|
| 2024 | 92.8% +6.6 vs same-age |
|
| 2025 | 93.2% +8.4 vs same-age |
The raw rate normally falls as cars age. The “vs same-age” figure compares this cohort with all UK cars registered in the same year, so normal ageing is not mistaken for a bad model year.
What fails on a 2018 Is
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Tyres | 279 | 57.6% |
| 2 | Brakes | 69 | 14.3% |
| 3 | Visibility | 69 | 14.3% |
| 4 | Lamps, reflectors and electrical equipment | 42 | 8.7% |
| 5 | Suspension | 8 | 1.7% |
| 6 | Identification of the vehicle | 6 | 1.2% |
All Is years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2014 | 9,014 | 88.8% | +13.0 pts | 84,831 |
| 2015 | 8,299 | 90.1% | +11.4 pts | 75,206 |
| 2016 | 5,883 | 90.0% | +8.6 pts | 65,266 |
| 2017 | 4,574 | 91.9% | +7.9 pts | 55,192 |
| 2018 (this page) | 4,299 | 92.9% | +6.5 pts | 49,642 |
| 2019 | 3,479 | 92.2% | +3.8 pts | 43,821 |
| 2020 | 1,689 | 93.7% | +3.8 pts | 30,334 |
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FAQs
Is a 2018 Lexus Is reliable?
2018-registered examples passed 92.9% of their MOT tests (4,299 tests, 2023–2025), +6.5 points versus all UK cars registered in the same year. At roughly 8 years old with a median 49,642 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2018 Is?
The median tested example shows 49,642 miles. Anything far beyond that isn't automatically bad — a motorway-mile car with consistent service records often beats a low-mileage school-run car — but price accordingly and scrutinise the mileage trail for gaps or drops.
Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts (96 million Class 4 initial tests; retests excluded). Only vehicles old enough for a routine first MOT are included. Age-adjusted figures compare the model-year cohort with all vehicles of the same registration year tested in the same calendar year. Contains public sector information licensed under OGL v3.0.