2021 Mg Zs Excite Vti- — MOT failures & pass rate
Across 4,332 MOT tests analysed for the 2021 Mg Zs Excite Vti-, the most common recorded failure areas were tyres, brakes and lighting & signalling. Its pass rate of 89.2% was below the average for cars of a similar age (91.2%). Higher-mileage examples failed more often — 16.4% in the 60-90k group versus 8.5% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 6.0% | 262 |
| 2 | Brakes | 3.7% | 160 |
| 3 | Lighting & signalling | 1.8% | 79 |
| 4 | Visibility | 1.6% | 67 |
| 5 | Suspension | 1.4% | 59 |
| 6 | Body, structure & corrosion | 0.3% | 11 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 274 |
| 2 | Brake pads | 89 |
| 3 | Service brake performance | 77 |
| 4 | Headlamp aim | 66 |
| 5 | Washers | 42 |
| 6 | Brake discs | 36 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 27.6% | 1,195 |
| 2 | Brakes | 23.8% | 1,032 |
| 3 | Other defects | 8.8% | 379 |
| 4 | Suspension | 2.8% | 123 |
| 5 | Visibility | 1.8% | 78 |
| 6 | Lighting & signalling | 1.2% | 51 |
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 | 2,561 | 8.5% |
| 30-60k | 1,706 | 14.2% |
| 60-90k | 61 | 16.4% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 74 | 4.0% |
| 2024 | 2,068 | 10.6% |
| 2025 | 2,182 | 11.3% |
What to check before buying a 2021 Zs Excite Vti-
Before buying a 2021 Mg Zs Excite Vti-, focus on the areas it most often fails on. Tyres accounted for 6.0% of tests for this year.
- Tyres (6.0% 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.
- Brakes (3.7% 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.
- Lighting & signalling (1.8% 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 Excite Vti-s pass their MOT?
89.2% of the 4,332 2021 Mg Zs Excite Vti- MOT tests in this dataset passed — a 10.8% fail rate.
What is the most common MOT failure on a 2021 Mg Zs Excite Vti-?
Tyres, recorded in 6.0% of tests, followed by brakes (3.7%).
Does the 2021 Zs Excite Vti- get worse with mileage?
Its MOT fail rate rises from 8.5% in the 0-30k band to 16.4% in the 60-90k band.
Methodology & source. Based on 4,332 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.