2021 Hyundai Bayon T- — MOT failures & pass rate
The 2021 Hyundai Bayon T- passed 93.0% of its 1,207 recorded MOT tests. All cars of a similar age fail 8.7% of the time, so this is 1.7pp better than the group it competes with. Failures cluster in visibility, tyres and brakes.
What the MOT record shows
Visibility dominates the failure mix at 6.0% of all tests — 4.1 points clear of tyres, so it is the first thing to check.
At component level the recurring items are wipers, washers and headlamp aim — wipers alone was recorded 72 times.
Advisories point at the next bill rather than this one: tyres was flagged on 16.3% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Visibility | 6.0% | 73 |
| 2 | Tyres | 2.0% | 24 |
| 3 | Brakes | 1.2% | 15 |
| 4 | Lighting & signalling | 0.6% | 7 |
| 5 | Emissions & environmental | 0.3% | 4 |
| 6 | Other defects | 0.3% | 3 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Wipers | 72 |
| 2 | Washers | 19 |
| 3 | Headlamp aim | 8 |
| 4 | Tread depth | 7 |
| 5 | Brake pads | 6 |
| 6 | Rbt (sp) | 6 |
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% | 197 |
| 2 | Brakes | 7.5% | 90 |
| 3 | Other defects | 5.6% | 68 |
| 4 | Visibility | 3.1% | 37 |
| 5 | Seat belts & restraints | 0.6% | 7 |
| 6 | Lighting & signalling | 0.5% | 6 |
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 | 868 | 5.5% |
| 30-60k | 327 | 10.4% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 599 | 7.8% |
| 2025 | 604 | 6.1% |
What to check before buying a 2021 Bayon T-
On a 2021 Bayon T-, visibility is what the MOT record says goes wrong most — it appeared in 6.0% of tests. Check these areas before you commit.
- Visibility (6.0% 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 (1.2% 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.
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 Hyundai Bayon T-s pass their MOT?
93.0% of the 1,207 2021 Hyundai Bayon T- MOT tests in this dataset passed — a 7.0% fail rate.
What is the most common MOT failure on a 2021 Hyundai Bayon T-?
Visibility, recorded in 6.0% of tests, followed by tyres (2.0%).
Does the 2021 Bayon T- get worse with mileage?
Its MOT fail rate rises from 5.5% in the 0-30k band to 10.4% in the 30-60k band.
Methodology & source. Based on 1,207 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.