2021 Mg Zs Excite T-Gdi Auto — MOT failures & pass rate
Across 1,646 MOT tests analysed for the 2021 Mg Zs Excite T-Gdi Auto, the most common recorded failure areas were tyres, brakes and lighting & signalling. Its pass rate of 91.4% was in line with the average for cars of a similar age (91.2%). Higher-mileage examples failed more often — 14.0% in the 60-90k group versus 6.8% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 4.6% | 76 |
| 2 | Brakes | 3.2% | 52 |
| 3 | Lighting & signalling | 1.8% | 30 |
| 4 | Visibility | 1.0% | 16 |
| 5 | Suspension | 0.9% | 14 |
| 6 | Emissions & environmental | 0.3% | 5 |
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 | 70 |
| 2 | Brake pads | 45 |
| 3 | Headlamp aim | 28 |
| 4 | Brake discs | 18 |
| 5 | Wipers | 12 |
| 6 | Tyre pressure monitoring system | 12 |
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 | 23.2% | 382 |
| 2 | Brakes | 20.7% | 341 |
| 3 | Other defects | 7.4% | 122 |
| 4 | Emissions & environmental | 3.6% | 59 |
| 5 | Suspension | 2.2% | 36 |
| 6 | Lighting & signalling | 1.7% | 28 |
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 | 940 | 6.8% |
| 30-60k | 660 | 10.6% |
| 60-90k | 43 | 14.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 35 | 2.9% |
| 2024 | 804 | 8.6% |
| 2025 | 805 | 8.8% |
What to check before buying a 2021 Zs Excite T-Gdi Auto
Before buying a 2021 Mg Zs Excite T-Gdi Auto, focus on the areas it most often fails on. Tyres accounted for 4.6% of tests for this year.
- Tyres (4.6% 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 (3.2% 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 T-Gdi Autos pass their MOT?
91.4% of the 1,646 2021 Mg Zs Excite T-Gdi Auto MOT tests in this dataset passed — a 8.6% fail rate.
What is the most common MOT failure on a 2021 Mg Zs Excite T-Gdi Auto?
Tyres, recorded in 4.6% of tests, followed by brakes (3.2%).
Does the 2021 Zs Excite T-Gdi Auto get worse with mileage?
Its MOT fail rate rises from 6.8% in the 0-30k band to 14.0% in the 60-90k band.
Methodology & source. Based on 1,646 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.