2021 Mg Zs Exclusive Vti- — MOT failures & pass rate
Across 8,508 MOT tests analysed for the 2021 Mg Zs Exclusive Vti-, the most common recorded failure areas were brakes, tyres and lighting & signalling. Its pass rate of 90.8% was in line with the average for cars of a similar age (91.2%). Higher-mileage examples failed more often — 23.3% in the 60-90k group versus 7.6% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Brakes | 4.7% | 403 |
| 2 | Tyres | 2.8% | 238 |
| 3 | Lighting & signalling | 1.7% | 144 |
| 4 | Suspension | 1.6% | 136 |
| 5 | Visibility | 1.5% | 123 |
| 6 | Steering | 0.3% | 22 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Brake pads | 194 |
| 2 | Service brake performance | 185 |
| 3 | Brake discs | 146 |
| 4 | Headlamp aim | 120 |
| 5 | Tread depth | 82 |
| 6 | Washers | 76 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 24.6% | 2,090 |
| 2 | Tyres | 14.5% | 1,231 |
| 3 | Other defects | 8.1% | 692 |
| 4 | Suspension | 3.2% | 274 |
| 5 | Visibility | 2.0% | 172 |
| 6 | Lighting & signalling | 1.5% | 130 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 5,407 | 7.6% |
| 30-60k | 2,952 | 11.6% |
| 60-90k | 146 | 23.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 127 | 7.1% |
| 2024 | 4,086 | 8.3% |
| 2025 | 4,285 | 10.2% |
What to check before buying a 2021 Zs Exclusive Vti-
Before buying a 2021 Mg Zs Exclusive Vti-, focus on the areas it most often fails on. Brakes accounted for 4.7% of tests for this year.
- Brakes (4.7% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
- Tyres (2.8% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Lighting & signalling (1.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2021 Mg Zs Exclusive Vti-s pass their MOT?
90.8% of the 8,508 2021 Mg Zs Exclusive Vti- MOT tests in this dataset passed — a 9.2% fail rate.
What is the most common MOT failure on a 2021 Mg Zs Exclusive Vti-?
Brakes, recorded in 4.7% of tests, followed by tyres (2.8%).
Does the 2021 Zs Exclusive Vti- get worse with mileage?
Its MOT fail rate rises from 7.6% in the 0-30k band to 23.3% in the 60-90k band.
Methodology & source. Based on 8,508 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.