2018 General Motors Unclassified — MOT History by Age
How cars manufactured in 2018 perform at MOT as they age
Data from official DVSA MOT testing records
Compared to Average at Age 6
✅ 8.2% above average (18367 models compared)
How This Car Ages
Pass rate progression for the 2018 General Motors Unclassified as it ages.
Bar chart showing pass rate by car age from 3 to 6 years
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| Age | Pass Rate | Tests |
|---|---|---|
| 3 yrs | 92.5% | 53 |
| 4 yrs | 97.1% | 34 |
| 5 yrs | 92.9% | 42 |
| 6 yrs | 81.6% | 76 |
Pass Rate Trend
How the 2018 General Motors Unclassified pass rate changes as it ages, from first MOT to most recent.
Trend shows declining over 4 years
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| Built | Pass Rate | Tests |
|---|---|---|
| 2024 (6 yrs) | 81.6% | 76 |
| 2023 (5 yrs) | 92.9% | 42 |
| 2022 (4 yrs) | 97.1% | 34 |
| 2021 (3 yrs) | 92.5% | 53 |
Year-by-Year MOT Results
Common MOT Failures
Top failure categories across all test years for 2018 General Motors Unclassified, with age trends.
How Failures Change With Age
Comparing failure rates between the youngest and oldest test years.
| Category | At Youngest | At Oldest | Change | Trend |
|---|---|---|---|---|
| Visibility | 1.9% (3 yrs) | 1.3% (6 yrs) | -0.6%
| ⚪ — |
Other Manufacture Years
Looking for the best year to buy? See the full comparison on the General Motors Unclassified page →
About This Data
This page shows how General Motors Unclassified cars manufactured in 2018 perform at MOT as they age. Data spans from 2021 to 2024, covering 205 tests. Pass rates naturally decline with age as components wear.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.