2021 Suzuki Swift Sz-T Dualjet Mhev — MOT failures & pass rate
Across 1,404 MOT tests analysed for the 2021 Suzuki Swift Sz-T Dualjet Mhev, the most common recorded failure areas were visibility, tyres and lighting & signalling. Its pass rate of 95.2% was above the average for cars of a similar age (91.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Visibility | 5.1% | 72 |
| 2 | Tyres | 1.6% | 23 |
| 3 | Lighting & signalling | 1.6% | 22 |
| 4 | Brakes | 1.1% | 16 |
| 5 | Seat belts & restraints | 0.1% | 2 |
| 6 | Emissions & environmental | 0.1% | 2 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 78 |
| 2 | Headlamp aim | 13 |
| 3 | Washers | 13 |
| 4 | Brake pads | 12 |
| 5 | Tread depth | 10 |
| 6 | Tyre pressure monitoring system | 4 |
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 | 13.6% | 191 |
| 2 | Brakes | 8.7% | 122 |
| 3 | Visibility | 4.5% | 63 |
| 4 | Other defects | 2.4% | 33 |
| 5 | Suspension | 0.7% | 10 |
| 6 | Road wheels | 0.5% | 7 |
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 | 1,119 | 4.3% |
| 30-60k | 273 | 7.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 681 | 4.1% |
| 2025 | 705 | 5.5% |
What to check before buying a 2021 Swift Sz-T Dualjet Mhev
Before buying a 2021 Suzuki Swift Sz-T Dualjet Mhev, focus on the areas it most often fails on. Visibility accounted for 5.1% of tests for this year.
- Visibility (5.1% 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.
- Tyres (1.6% 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.
- Lighting & signalling (1.6% 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 Suzuki Swift Sz-T Dualjet Mhevs pass their MOT?
95.2% of the 1,404 2021 Suzuki Swift Sz-T Dualjet Mhev MOT tests in this dataset passed — a 4.8% fail rate.
What is the most common MOT failure on a 2021 Suzuki Swift Sz-T Dualjet Mhev?
Visibility, recorded in 5.1% of tests, followed by tyres (1.6%).
Does the 2021 Swift Sz-T Dualjet Mhev get worse with mileage?
Its MOT fail rate rises from 4.3% in the 0-30k band to 7.0% in the 30-60k band.
Methodology & source. Based on 1,404 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.