2018 MG Gs MOT pass rate: 82.6% (2,855 tests)
Is the 2018 Gs getting worse?
Pass rate of 2018-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2023 | 86.2% -1.8 vs same-age |
|
| 2024 | 80.7% -5.5 vs same-age |
|
| 2025 | 80.8% -4.0 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 Gs
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Brakes | 315 | 31.0% |
| 2 | Tyres | 219 | 21.6% |
| 3 | Lamps, reflectors and electrical equipment | 198 | 19.5% |
| 4 | Seat belts and supplementary restraint systems | 75 | 7.4% |
| 5 | Noise, emissions and leaks | 59 | 5.8% |
| 6 | Visibility | 59 | 5.8% |
All Gs years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2016 | 1,688 | 80.8% | -0.5 pts | 53,614 |
| 2017 | 2,784 | 80.1% | -3.9 pts | 48,066 |
| 2018 (this page) | 2,855 | 82.6% | -3.7 pts | 40,945 |
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FAQs
Is a 2018 MG Gs reliable?
2018-registered examples passed 82.6% of their MOT tests (2,855 tests, 2023–2025), -3.7 points versus all UK cars registered in the same year. At roughly 8 years old with a median 40,945 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2018 Gs?
The median tested example shows 40,945 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.