How reliable is the Kia Stonic compared with other cars?

We do not publish a comparison for the Kia Stonic, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages.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 87.8% across 32,758 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 Kia Stonic?

The item recorded most often is "a brake lining or pad worn below 1.5mm", which appears in 27.8% of failed Kia Stonic 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 Kia Stonic?

The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 17.8% of all Kia Stonic tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Kia Stonic usually have at its MOT?

The average odometer reading recorded at test is 35,421 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 Kia Stonic models petrol or diesel?

Of the Kia Stonic cars tested, 69% are petrol, 24% are hybrid, 7% are diesel. Fuel type affects which items tend to fail, particularly emissions and exhaust components.

Model reliability file

Kia Stonic MOT pass rate & common failures

From 32,758 recorded MOT tests of the Kia Stonic, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 32,758 MOT tests, 87.8% of Kia Stonic tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Kia Stonic 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 a brake lining or pad worn below 1.5mm, which appears in 27.8% of failed tests. Cars of this model average 35,421 miles on the odometer when tested.

At a glance

Recorded pass rate

87.8%unadjusted, not comparable32,758 tests

We are not publishing a ranking for the Stonic. 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 32,758 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

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

1.A brake lining or pad worn below 1.5mm27.8%
841 occurrencesBrake drum or shoe worn or contaminated explained
2.Wiper blade missing or obviously not clearing the windscreen17.3%
523 occurrencesWiper or washer not working properly explained
3.Tyre tread depth not in accordance with the requirements15.4%
467 occurrencesTyre worn close to the legal limit explained
4.A tyre seriously damaged10.3%
311 occurrencesTyre damaged or deteriorated explained
5.A suspension joint dust cover missing or no longer prevents the ingress of dirt etc7.1%
214 occurrencesSuspension joint dust cover missing or split explained
6.Windscreen washers not working or not providing sufficient fluid to clear the windscreen5.1%
155 occurrencesWiper or washer not working properly explained
7.Brake disc or drum significantly and obviously worn5.0%
152 occurrencesBrake disc worn, pitted or scored explained
8.Windscreen washers not working or not providing sufficient fluid to clear the windscreen5.0%
151 occurrencesWiper or washer not working properly explained
9.A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED4.8%
144 occurrencesHeadlamp not working explained
10.Engine MIL illuminated indicating a malfunction3.2%
98 occurrencesEngine management light on, or not working explained

Warnings without a failure

Most common advisories

Share of all Kia Stonic 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 requirements17.8%
5,822 testsTyre worn close to the legal limit explained
2.A brake lining or pad worn below 1.5mm13.1%
4,304 testsBrake drum or shoe worn or contaminated explained
3.A tyre seriously damaged8.8%
2,882 testsTyre damaged or deteriorated explained
4.Brake disc or drum excessively weakened, insecure or fractured8.1%
2,642 testsBrake disc worn, pitted or scored explained
5.Brake disc or drum significantly and obviously worn4.4%
1,446 testsBrake disc worn, pitted or scored explained
6.Child Seat fitted not allowing full inspection of adult belt2.9%
950 tests
7.Nail in tyre2.5%
828 tests
8.Tyre tread depth not in accordance with the requirements2.3%
742 testsTyre worn close to the legal limit explained

What gets tested

The Stonic fleet

Average mileage recorded at test: 35,421
Fuel mix of tested cars: Petrol69.3%
Hybrid23.6%
Diesel7.1%

Trim names grouped into this model (18)

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

STONIC 2
STONIC 2 S-A
STONIC 3 ISG MHEV S-A
STONIC CONNECT MHEV
STONIC CONNECT MHEV S-A
STONIC CRDI
STONIC GT-LINE
STONIC GT-LINE ISG MHEV
STONIC GT-LINE ISG MHEV S-A
STONIC GT-LINE ISG SA
STONIC GT-LINE S ISG MHEV
STONIC GT-LINE S ISG MHEV S-A
STONIC GT-LINE S MHEV
STONIC GT-LINE S MHEV S-A
STONIC GT-LINE S-A
STONIC MAXX
STONIC MAXX S-A
STONIC T-GDI

Check a specific Kia Stonic

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

Compare within the range

Other Kia models

Kia Sportage — 71.7% adjusted
Kia Picanto — 65.5% adjusted
Kia Ceed — 68.9% adjusted
Kia Niro — 85.8% adjusted
Kia Rio — 69.0% adjusted
Kia Venga — 64.3% adjusted
All Kia models

Common questions

How reliable is the Kia Stonic compared with other cars?: We do not publish a comparison for the Kia Stonic, 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 87.8% across 32,758 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 Kia Stonic?: The item recorded most often is "a brake lining or pad worn below 1.5mm", which appears in 27.8% of failed Kia Stonic 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 Kia Stonic?: The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 17.8% of all Kia Stonic tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Kia Stonic usually have at its MOT?: The average odometer reading recorded at test is 35,421 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 Kia Stonic models petrol or diesel?: Of the Kia Stonic cars tested, 69% are petrol, 24% are hybrid, 7% are diesel. 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.