Hyundai Bayon Mk1 (2021-present) reliability
Hyundai Bayon Mk1 built around 2021: about average at the MOT
Hyundai Bayon Mk1 models built around 2021 fail their MOT about as often as similar cars the same age.
Looking at a Hyundai Bayon Mk1?
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Key figure
9% of MOT tests on Hyundai Bayon Mk1 models built around 2021 ended in a fail (retests included), against 11% for similar cars the same age.
Most common issue
The most common MOT issue on Hyundai Bayon Mk1 models built around 2021 involves the tyres.
Based on 4,119 tests of Bayon models registered 2021+.
About 1 in 6 hybrid electric Bayon cars registered in 2022 (18.2%) failed their first MOT.
Based on 3,284 first MOTs (DVSA MOT results, 2025).
About 1 in 100 Bayon Mk1 MOTs (0.9%) failed and still hadn't passed 3 days later. That's for cars built around 2021 (4 years old), all fuels combined.
Based on 740 tests (DVSA MOT results, 2025), a small sample, so the figure is likely between 0.5% and 1.9%. A fail that passed a retest within 3 days, even the same day, isn't counted. Nor is a fail with no later MOT on record.
1.6% of Bayon Mk1 MOTs found at least one dangerous defect. These are cars built around 2021 (4 years old).
Based on 740 tests (DVSA MOT results, 2025), a small sample, so the figure is likely between 0.9% and 2.8%. Dangerous is the most serious grade an MOT gives: a direct risk to road safety.
Mk1 fail rate by age
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 3 years old.
How the Bayon Mk1 compares
At each age below, see how the Bayon Mk1 holds up against other cars the same age. The averages combine all fuel types.
Based on 70,937 tests across 10 Hyundai models, built around 2021 (4 years old).
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs.
What to check before viewing
The model's most common MOT issues, turned into things you can ask about or look for.
Brake discs
High priorityAsk for the date and mileage of the last disc replacement; visually check for a deep wear lip and rust pitting on each disc.
Brake pads
High priorityAsk when the pads were last replaced and check the warning-light history.
Tyres
Worth checkingCheck tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.
Vehicle-specific check
Worth checkingCheck the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.
Other SUVs to compare
Other SUVs, with each one's figures taken at the same age as the Bayon Mk1.
- 1
Volkswagen ID4 1ST Edition
Same body type, tested at the same age
- Fail rate
- 11.8%
No clear edge over the Hyundai Bayon Mk1 on these figures.
2 critical recall campaigns matching this model/build period.
1,711 MOT tests on cars built around 2021
- 2
Lexus UX
Same body type, tested at the same age
- Fail rate
- 6%
- Fail, no pass in 3 days
- 0.7%
- Dangerous
- 1.8%
Lower fail rate: 6.0%, against 9.2% for the Hyundai Bayon Mk1, both built around 2021.
4,973 MOT tests on cars built around 2021
- 3
Lexus RX
Same body type, tested at the same age
- Fail rate
- 5.1%
- Fail, no pass in 3 days
- 0.5%
- Dangerous
- 1.7%
- Still registered at 10 years
- 90.4%
Lower fail rate: 5.1%, against 9.2% for the Hyundai Bayon Mk1, both built around 2021.
1,784 MOT tests on cars built around 2021
- 4
Toyota Yaris Cross
Same body type, tested at the same age
- Fail rate
- 7%
- Fail, no pass in 3 days
- 0.6%
- Dangerous
- 1.2%
Lower fail rate: 7.0%, against 9.2% for the Hyundai Bayon Mk1, both built around 2021.
1,425 MOT tests on cars built around 2021
- Fail rate
- = the share of MOT tests that ended in a fail. Retests count as tests.
- Fail, no pass in 3 days
- = the share of MOT tests that failed and still hadn't passed 3 days later. A fail that passed a retest within 3 days, even the same day, isn't counted.
- Dangerous
- = the share of MOT tests where the tester marked a fault as dangerous. It is against the law to drive the car until it is fixed.
- Still registered at 10 years
- = the share of cars still registered (taxed or declared off the road) 10 years after they were first registered.
Recall context
DVSA's recall list has no recalls filed under the Hyundai Bayon name. For the exact car, check with the maker or GOV.UK's recall checker.
Mk1 variants compared
Bayon Mk1 variants built around 2021
The fail rate for each Bayon Mk1 variant, grouped by fuel. Each row counts fails per MOT test, the same way as the main fail rate chart.
Hybrid electric
- BAYON PREMIUM T-GDI MHEV9.3%270 tests
- BAYON SE CONNECT T-GDI MHEV11.8%221 tests
Most common issues on Hyundai Bayons of this age
This list covers every Hyundai Bayon built around 2021, whichever generation it is. We don't have a defect list for the Mk1 on its own.
Most common advisories and fails
In order of the share of MOT tests that recorded each one
- 112.3%Advisory
Tyre slightly damaged, cracking or perishing
- 211.6%Advisory
Tyre worn close to the legal limit or worn on the edge
- 36.9%Advisory
Brake disc worn, pitted or scored, but not seriously weakened
- 43.8%Advisory
Tyre has a cut that does not reach the ply or cords
- 53.1%Advisory
Brake pads wearing thin
Based on 740 tests
Looking at a Hyundai Bayon Mk1?
Enter its number plate to see its full MOT history, risk rating and running costs.
Frequently asked questions
Built around 2021 (4 years old), the Hyundai Bayon Mk1 (2021-present) fails MOTs slightly less often than typical for this age. This is based on 740 4-year-old MOT tests from DVSA data. Each retest counts as a test.