How reliable is the Hyundai Ioniq compared with other cars?

We do not publish a comparison for the Hyundai Ioniq, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages.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 86.2% across 48,982 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 Ioniq?

The item recorded most often is "Tyre tread depth not in accordance with the requirements", which appears in 22.7% of failed Hyundai Ioniq 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 Ioniq?

The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 18.6% of all Hyundai Ioniq tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

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

The average odometer reading recorded at test is 69,657 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.

Which Hyundai Ioniq years are the most reliable?

Going by MOT pass rate, Hyundai Ioniq cars first registered 2020–2022 do best at 87.5%, and those registered 2014–2016 do worst at 85.9%. But that ordering is mostly age, not build year: almost every model passes less often as it wears, so the newest cars top this list whatever they are. A specific year looking strong here means little on its own; the failure items above, and the individual car's own MOT history, tell you far more.

Does a Hyundai Ioniq get harder to pass as it ages?

Yes. At 3 to 5 years old, 87.5% of Hyundai Ioniq tests pass. By 9 to 11 years, that falls to 85.9%. Nearly every model follows this pattern, which is why comparing raw pass rates between models is misleading unless age is accounted for.

Are most Hyundai Ioniq models petrol or diesel?

Of the Hyundai Ioniq cars tested, 80% are hybrid, 20% are electric. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

Model reliability file

Hyundai Ioniq MOT pass rate & common failures

From 48,982 recorded MOT tests of the Hyundai Ioniq, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 48,982 MOT tests, 86.2% of Hyundai Ioniq tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Hyundai Ioniq 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 tyre tread depth not in accordance with the requirements, which appears in 22.7% of failed tests. Cars of this model average 69,657 miles on the odometer when tested.

At a glance

Recorded pass rate

86.2%unadjusted, not comparable48,982 tests

We are not publishing a ranking for the Ioniq. 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 48,982 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

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

1.Tyre tread depth not in accordance with the requirements22.7%
1,124 occurrencesTyre worn close to the legal limit explained
2.A tyre seriously damaged14.2%
704 occurrencesTyre damaged or deteriorated explained
3.Wiper blade missing or obviously not clearing the windscreen12.8%
635 occurrencesWiper or washer not working properly explained
4.A tyre cords visible or damaged9.0%
443 occurrencesTyre ply or cord exposed, or the casing separating explained
5.Parking brake efficiency below minimum requirement8.2%
405 occurrencesParking brake efficiency too low explained
6.Headlamp levelling device inoperative6.4%
315 occurrencesHeadlamp not working explained
7.Service brake efficiency below minimum requirement6.3%
311 occurrencesBraking efficiency below requirement explained
8.A brake lining or pad worn below 1.5mm5.3%
260 occurrencesBrake drum or shoe worn or contaminated explained
9.A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps5.2%
256 occurrencesLamp not working explained
10.A suspension joint dust cover missing or no longer prevents the ingress of dirt etc4.8%
239 occurrencesSuspension joint dust cover missing or split explained

Warnings without a failure

Most common advisories

Share of all Hyundai Ioniq 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 requirements18.6%
9,115 testsTyre worn close to the legal limit explained
2.A tyre seriously damaged11.1%
5,451 testsTyre damaged or deteriorated explained
3.Brake disc or drum excessively weakened, insecure or fractured7.3%
3,557 testsBrake disc worn, pitted or scored explained
4.Tyre tread depth not in accordance with the requirements2.9%
1,406 testsTyre worn close to the legal limit explained
5.A brake lining or pad worn below 1.5mm2.4%
1,182 testsBrake drum or shoe worn or contaminated explained
6.Child Seat fitted not allowing full inspection of adult belt1.8%
896 tests
7.Nail in tyre1.7%
818 tests
8.A tyre seriously damaged1.4%
688 testsTyre damaged or deteriorated explained

The rest of the record

Everything else recorded on the Hyundai Ioniq

The 18 other defects testers recorded on this model, beyond the most common listed above. Each links to what it means and what it takes to put right.

Known faults

Hyundai Ioniq common problems, by part and by year

The same failure record read the way a buyer asks the question: which parts wear out on a Ioniq, when they start, and how each registration year compares — including the steps that mark a generation change.

Ioniq common problems and results by year

How wear changes the picture

Ioniq pass rate by age and registration year

How often the Hyundai Ioniq passes at each age, with the years those cars were first registered. Tests are from 2025, so a car aged 3 to 5 was first used in 2020–2022.

3–5 yrsreg. 2020–202287%

6–8 yrsreg. 2017–201985%

9–11 yrsreg. 2014–201686%

Read this as an age curve rather than a verdict on particular model years. Nearly every car passes less often as it gets older, so a newer Ioniq outscoring an older one says more about wear than about how that year’s cars were built. Bands holding too few tests to be meaningful are omitted rather than shown as a rate.

What gets tested

The Ioniq fleet

Average mileage recorded at test: 69,657
Fuel mix of tested cars: Hybrid79.8%
Electric20.1%

Trim names grouped into this model (12)

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

HYUNDAI IONIQ PREMIUM SE HEV S-A
IONIQ FIRST EDITION HEV S-A
IONIQ HYBRID
IONIQ PREMIUM EV
IONIQ PREMIUM HEV S-A
IONIQ PREMIUM PHEV S-A
IONIQ PREMIUM SE
IONIQ PREMIUM SE HEV S-A
IONIQ PREMIUM SE PHEV
IONIQ PREMIUM SE PHEV S-A
IONIQ SE CONNECT HEV S-A
IONIQ SE HEV S-A

Check a specific Hyundai Ioniq

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 Ioniq compared with other cars?: We do not publish a comparison for the Hyundai Ioniq, 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 86.2% across 48,982 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 Ioniq?: The item recorded most often is "Tyre tread depth not in accordance with the requirements", which appears in 22.7% of failed Hyundai Ioniq 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 Ioniq?: The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 18.6% of all Hyundai Ioniq tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Hyundai Ioniq usually have at its MOT?: The average odometer reading recorded at test is 69,657 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.
Which Hyundai Ioniq years are the most reliable?: Going by MOT pass rate, Hyundai Ioniq cars first registered 2020–2022 do best at 87.5%, and those registered 2014–2016 do worst at 85.9%. But that ordering is mostly age, not build year: almost every model passes less often as it wears, so the newest cars top this list whatever they are. A specific year looking strong here means little on its own; the failure items above, and the individual car's own MOT history, tell you far more.
Does a Hyundai Ioniq get harder to pass as it ages?: Yes. At 3 to 5 years old, 87.5% of Hyundai Ioniq tests pass. By 9 to 11 years, that falls to 85.9%. Nearly every model follows this pattern, which is why comparing raw pass rates between models is misleading unless age is accounted for.
Are most Hyundai Ioniq models petrol or diesel?: Of the Hyundai Ioniq cars tested, 80% are hybrid, 20% are electric. 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.