How reliable is the Hyundai Bayon compared with other cars?

We do not publish a comparison for the Hyundai Bayon, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 84.8% across 5,490 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.

What is the most common MOT failure on a Hyundai Bayon?

The item recorded most often is "Wiper blade missing or obviously not clearing the windscreen", which appears in 53.8% of failed Hyundai Bayon tests. Because one failed test can list several items, these shares do not add up to 100%.

What do testers most often warn about on a Hyundai Bayon?

The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 11.6% of all Hyundai Bayon tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Hyundai Bayon usually have at its MOT?

The average odometer reading recorded at test is 23,415 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

Are most Hyundai Bayon models petrol or diesel?

Of the Hyundai Bayon cars tested, 99% are hybrid, 1% are petrol. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

Model reliability file

Hyundai Bayon MOT pass rate & common failures

From 5,490 recorded MOT tests of the Hyundai Bayon, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 5,490 MOT tests, 84.8% of Hyundai Bayon tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Hyundai Bayon fleet does not yet cover a wide enough spread of ages and distances to compare it fairly against other models. Its most commonly recorded failure is wiper blade missing or obviously not clearing the windscreen, which appears in 53.8% of failed tests. Cars of this model average 23,415 miles on the odometer when tested.

At a glance

Recorded pass rate

84.8%unadjusted, not comparable5,490 tests

We are not publishing a ranking for the Bayon. The examples tested do not cover a wide enough spread of ages and mileages to compare it fairly, and an unadjusted pass rate mostly sorts models by how recently they were bought rather than how well they were built. The failure and advisory patterns below come from the same 5,490 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

Share of failed Hyundai Bayon tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.Wiper blade missing or obviously not clearing the windscreen53.8%
322 occurrencesWiper or washer not working properly explained
2.A tyre seriously damaged12.5%
75 occurrencesTyre damaged or deteriorated explained
3.Windscreen washers not working or not providing sufficient fluid to clear the windscreen7.8%
47 occurrencesWiper or washer not working properly explained
4.Tyre tread depth not in accordance with the requirements6.7%
40 occurrencesTyre worn close to the legal limit explained
5.A brake lining or pad worn below 1.5mm6.0%
36 occurrencesBrake drum or shoe worn or contaminated explained
6.Windscreen washers not working or not providing sufficient fluid to clear the windscreen3.7%
22 occurrencesWiper or washer not working properly explained
7.A tyre seriously damaged3.5%
21 occurrencesTyre damaged or deteriorated explained
8.A tyre cords visible or damaged3.5%
21 occurrencesTyre ply or cord exposed, or the casing separating explained
9.Parking brake efficiency below minimum requirement3.3%
20 occurrencesParking brake efficiency too low explained
10.Brake lining or pad missing or incorrectly mounted3.2%
19 occurrencesBrake drum or shoe worn or contaminated explained

Warnings without a failure

Most common advisories

Share of all Hyundai Bayon tests carrying each advisory. The denominator differs from the failure list above because an advisory can be issued on a car that passed.

1.Tyre tread depth not in accordance with the requirements11.6%
633 testsTyre worn close to the legal limit explained
2.A tyre seriously damaged8.5%
461 testsTyre damaged or deteriorated explained
3.Brake disc or drum excessively weakened, insecure or fractured4.8%
262 testsBrake disc worn, pitted or scored explained
4.Nail in tyre2.9%
158 tests
5.Child Seat fitted not allowing full inspection of adult belt2.5%
135 tests
6.A brake lining or pad worn below 1.5mm2.4%
131 testsBrake drum or shoe worn or contaminated explained
7.A tyre seriously damaged2.2%
118 testsTyre damaged or deteriorated explained
8.Tyre tread depth not in accordance with the requirements1.7%
92 testsTyre worn close to the legal limit explained

What gets tested

The Bayon fleet

Average mileage recorded at test: 23,415
Fuel mix of tested cars: Hybrid99.1%
Petrol0.9%

Trim names grouped into this model (10)

Recorded exactly as DVSA holds them. Trim-level names are rolled up so one model is not split across a dozen thin pages.

BAYON ADVANCE T-GDI AUTO
BAYON PREMIUM T-GDI
BAYON PREMIUM T-GDI MHEV
BAYON PREMIUM T-GDI MHEV AUTO
BAYON SE
BAYON SE CONNECT T-GDI MHEV
BAYON SE CONNECT T-GDI MHEV A
BAYON ULTIMATE T-GDI
BAYON ULTIMATE T-GDI MHEV
BAYON ULTIMATE T-GDI MHEV AUTO

Check a specific Hyundai Bayon

A model average tells you the pattern. Its own MOT record tells you the car.

Compare within the range

Other Hyundai models

Hyundai I10 — 67.7% adjusted
Hyundai Tucson — 74.8% adjusted
Hyundai I20 — 70.0% adjusted
Hyundai I30 — 68.7% adjusted
Hyundai Kona — 86.3% unadjusted
Hyundai IX35 — 63.8% unadjusted
All Hyundai models

Common questions

How reliable is the Hyundai Bayon compared with other cars?: We do not publish a comparison for the Hyundai Bayon, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 84.8% across 5,490 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.
What is the most common MOT failure on a Hyundai Bayon?: The item recorded most often is "Wiper blade missing or obviously not clearing the windscreen", which appears in 53.8% of failed Hyundai Bayon tests. Because one failed test can list several items, these shares do not add up to 100%.
What do testers most often warn about on a Hyundai Bayon?: The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 11.6% of all Hyundai Bayon tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Hyundai Bayon usually have at its MOT?: The average odometer reading recorded at test is 23,415 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.
Are most Hyundai Bayon models petrol or diesel?: Of the Hyundai Bayon cars tested, 99% are hybrid, 1% are petrol. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

How this was worked out

Method and limits

Figures come from the DVSA anonymised MOT testing dataset, published under the Open Government Licence. Only class 4 initial tests are counted: retests are excluded so a car appears once, and abandoned tests are excluded entirely. No adjusted rate is shown because this model's tested examples do not cover enough of the national age and mileage range for standardisation to mean anything.

An MOT measures whether a car met a legal standard on the day. It is not a breakdown record, a service history or a running-cost estimate, and a pass rate is a property of a fleet rather than a prediction about one car.