2021 Suzuki Swift Sz-L Dualjet Mhev — MOT failures & pass rate
Across 8,440 MOT tests analysed for the 2021 Suzuki Swift Sz-L Dualjet Mhev, the most common recorded failure areas were visibility, tyres and brakes. Its pass rate of 95.0% 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 | 4.5% | 382 |
| 2 | Tyres | 2.0% | 171 |
| 3 | Brakes | 1.3% | 109 |
| 4 | Lighting & signalling | 1.0% | 86 |
| 5 | Seat belts & restraints | 0.2% | 16 |
| 6 | Suspension | 0.1% | 11 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 426 |
| 2 | Brake pads | 86 |
| 3 | Headlamp aim | 78 |
| 4 | Washers | 50 |
| 5 | Tread depth | 44 |
| 6 | Tyre pressure monitoring system | 16 |
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 | 16.3% | 1,378 |
| 2 | Brakes | 10.8% | 909 |
| 3 | Other defects | 4.0% | 333 |
| 4 | Visibility | 3.8% | 318 |
| 5 | Suspension | 0.5% | 39 |
| 6 | Road wheels | 0.3% | 26 |
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 | 6,098 | 3.9% |
| 30-60k | 2,143 | 7.8% |
| 60-90k | 181 | 8.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 133 | 2.3% |
| 2024 | 4,085 | 4.0% |
| 2025 | 4,222 | 6.1% |
What to check before buying a 2021 Swift Sz-L Dualjet Mhev
Before buying a 2021 Suzuki Swift Sz-L Dualjet Mhev, focus on the areas it most often fails on. Visibility accounted for 4.5% of tests for this year.
- Visibility (4.5% 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 (2.0% 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 (1.3% 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.
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-L Dualjet Mhevs pass their MOT?
95.0% of the 8,440 2021 Suzuki Swift Sz-L Dualjet Mhev MOT tests in this dataset passed — a 5.0% fail rate.
What is the most common MOT failure on a 2021 Suzuki Swift Sz-L Dualjet Mhev?
Visibility, recorded in 4.5% of tests, followed by tyres (2.0%).
Does the 2021 Swift Sz-L Dualjet Mhev get worse with mileage?
Its MOT fail rate rises from 3.9% in the 0-30k band to 8.3% in the 60-90k band.
Methodology & source. Based on 8,440 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.