2021 Ford Mustang Mach-E Ext Range — MOT failures & pass rate
Across 2,937 MOT tests analysed for the 2021 Ford Mustang Mach-E Ext Range, the most common recorded failure areas were tyres, lighting & signalling and visibility. Its pass rate of 92.5% was above the average for cars of a similar age (91.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 5.8% | 171 |
| 2 | Lighting & signalling | 1.9% | 57 |
| 3 | Visibility | 0.8% | 24 |
| 4 | Brakes | 0.4% | 12 |
| 5 | Other defects | 0.3% | 9 |
| 6 | Seat belts & restraints | 0.2% | 6 |
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 | 91 |
| 2 | Headlamp aim | 72 |
| 3 | Wipers | 14 |
| 4 | Registration plates | 14 |
| 5 | Washers | 13 |
| 6 | Tyre pressure monitoring system | 8 |
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 | 23.3% | 684 |
| 2 | Brakes | 4.2% | 122 |
| 3 | Other defects | 4.1% | 120 |
| 4 | Visibility | 2.3% | 66 |
| 5 | Suspension | 0.9% | 26 |
| 6 | Emissions & environmental | 0.4% | 11 |
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 | 1,295 | 5.5% |
| 30-60k | 1,377 | 8.9% |
| 60-90k | 234 | 9.8% |
| 90-120k | 30 | 6.7% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 1,423 | 6.9% |
| 2025 | 1,486 | 8.1% |
What to check before buying a 2021 Mustang Mach-E Ext Range
Before buying a 2021 Ford Mustang Mach-E Ext Range, focus on the areas it most often fails on. Tyres accounted for 5.8% of tests for this year.
- Tyres (5.8% 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 (1.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (0.8% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£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 Ford Mustang Mach-E Ext Ranges pass their MOT?
92.5% of the 2,937 2021 Ford Mustang Mach-E Ext Range MOT tests in this dataset passed — a 7.5% fail rate.
What is the most common MOT failure on a 2021 Ford Mustang Mach-E Ext Range?
Tyres, recorded in 5.8% of tests, followed by lighting & signalling (1.9%).
Does the 2021 Mustang Mach-E Ext Range get worse with mileage?
Its MOT fail rate rises from 5.5% in the 0-30k band to 6.7% in the 90-120k band.
Methodology & source. Based on 2,937 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.