MG MOT Failure Rates
MOT failure rates for 20 MG models, ranked from highest to lowest failure rate. Data from official DVSA MOT test records covering 142 million UK MOT tests.
MG MOT Reliability Overview
Across 20 models with sufficient test data, MG vehicles have an average MOT failure rate of 22.6%. This puts MG below the UK national average of 28%, suggesting above-average reliability across the range.
The most reliable MG model for MOT is the MG 4 with a 6.1% failure rate. The highest failure rate belongs to the MG Zt-T at 41.6%.
These figures are calculated from real DVSA MOT test records and represent weighted averages across all vehicle ages and mileage bands. Only models with 100 or more test records are included to ensure statistical reliability.
Which MG Models Fail MOT Most?
| Model | Failure Rate | Total Tests |
|---|---|---|
| MG Zt-T | 41.6% | 4,199 |
| MG ZR | 37.8% | 10,816 |
| MG 6 | 37.1% | 9,367 |
| MG ZT | 37.0% | 7,397 |
| MG MGF | 35.2% | 29,288 |
| MG TF | 31.2% | 42,853 |
| MG Maestro | 26.0% | 258 |
| MG Midget | 22.4% | 5,220 |
| MG 3 | 21.5% | 72,418 |
| MG Metro | 21.4% | 571 |
| MG GS | 19.3% | 11,771 |
| MG MGB | 19.0% | 1,896 |
| MG Magnette | 19.0% | 274 |
| MG ZS | 16.1% | 112,017 |
| MG MGC | 15.0% | 213 |
| MG 5 | 13.8% | 13,510 |
| MG Rv8 | 12.3% | 2,648 |
| MG MGA | 12.0% | 325 |
| MG HS | 9.2% | 23,459 |
| MG 4 | 6.1% | 1,188 |
How we calculate failure rates: Rates are weighted averages across all mileage bands for each model. Only models with 100+ test records are shown. Data sourced from official DVSA MOT test records covering 142 million tests.
MG MOT FAQs
Are MG cars reliable for MOT?
MG has 20 models in our database. Overall, MG vehicles perform well in MOT tests with an average failure rate below the national average of 28%. Click on any model above to see a detailed component-level breakdown.
Which MG model is best for MOT?
The MG 4 has the lowest MOT failure rate at 6.1%, making it the most reliable MG model in our dataset. See full MG 4 MOT data.
Which MG model fails MOT most?
The MG Zt-T has the highest failure rate at 41.6%. This doesn’t necessarily mean it’s a bad car — higher failure rates often correlate with older average vehicle age. See full MG Zt-T MOT data.
How can I predict if my MG will pass its MOT?
AutoSafe offers a free AI-powered MOT prediction tool. Enter your registration number and postcode to get a personalised failure risk assessment based on your specific vehicle’s age, mileage, and MOT history.
Check Your MG
Enter your reg to get a personalised MOT failure prediction for your specific MG.
Related Guides
- Top 10 MOT Failure Points
- Pre-MOT Checklist
- MOT Failure Rates by Car
- How to Check MOT History
- Will My Car Pass Its MOT?
Other Makes
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