Is the Hyundai I800 reliable?

On MOT evidence the Hyundai I800 is well below average. It passes 61.1% of tests once age and mileage are accounted for, against a national average of 72.3%. That figure covers 79% of the national age and mileage range, which is enough to quote but not to rank. This measures how often the car meets the MOT standard, not how often it breaks down or what a repair costs.

What do testers most often warn about on a Hyundai I800?

The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 24.8% of all Hyundai I800 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Hyundai I800 usually have at its MOT?

The average odometer reading recorded at test is 91,175 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 I800 years are the most reliable?

Going by MOT pass rate, Hyundai I800 cars first registered 2017–2019 do best at 67.8%, and those registered 2010 and earlier do worst at 56.6%. 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 I800 get harder to pass as it ages?

Yes. At 6 to 8 years old, 67.8% of Hyundai I800 tests pass. By fifteen years or more, that falls to 56.6%. Nearly every model follows this pattern, which is why comparing raw pass rates between models is misleading unless age is accounted for.

Model reliability file

Hyundai I800 MOT pass rate & common failures

From 7,916 recorded MOT tests of the Hyundai I800, published by DVSA.

Data updated 29 July 2026

Quick answer

The Hyundai I800 passes 61.1% of MOT tests once results are adjusted for the age and mileage of the cars tested, against a national average of 72.3%. That is well below average. Based on 7,916 tests. Its most commonly recorded failure is lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, which appears in 25.5% of failed tests. Cars of this model average 91,175 miles on the odometer when tested.

At a glance

Pass rate, adjusted for age and mileage

61.1%national average72.3%unadjusted62.7%range covered79%

The I800 is 11.2 percentage points below the national pass rate once age and mileage are accounted for, which is well below average. The unadjusted figure is 62.7%; the difference is what the age and mileage of this model’s fleet was hiding.

DVSA recorded wording

Most common failure items

Share of failed Hyundai I800 tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning25.5%
539 occurrencesLamp not working explained
2.The aim of a headlamp is not within limits laid down in the requirements14.6%
309 occurrencesHeadlamp aim incorrect explained
3.A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED14.3%
303 occurrencesHeadlamp not working explained
4.A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps13.8%
292 occurrencesLamp not working explained
5.Parking brake efficiency below minimum requirement13.1%
276 occurrencesParking brake efficiency too low explained
6.A brake lining or pad worn below 1.5mm12.8%
271 occurrencesBrake drum or shoe worn or contaminated explained
7.Tyre tread depth not in accordance with the requirements11.1%
234 occurrencesTyre worn close to the legal limit explained
8.Parking brake inoperative on one side10.7%
226 occurrencesParking brake efficiency too low explained
9.Wiper blade missing or obviously not clearing the windscreen8.7%
185 occurrencesWiper or washer not working properly explained
10.Engine MIL illuminated indicating a malfunction8.7%
183 occurrencesEngine management light on, or not working explained

Warnings without a failure

Most common advisories

Share of all Hyundai I800 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 requirements24.8%
1,966 testsTyre worn close to the legal limit explained
2.A brake lining or pad worn below 1.5mm15.8%
1,253 testsBrake drum or shoe worn or contaminated explained
3.Brake disc or drum excessively weakened, insecure or fractured14.3%
1,131 testsBrake disc worn, pitted or scored explained
4.Brake pipe damaged or excessively corroded6.9%
546 testsBrake pipe corroded explained
5.Child Seat fitted not allowing full inspection of adult belt6.8%
541 tests
6.A tyre seriously damaged6.5%
515 testsTyre damaged or deteriorated explained
7.Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users6.0%
473 tests
8.Brake disc or drum significantly and obviously worn4.9%
389 testsBrake disc worn, pitted or scored explained

The rest of the record

Everything else recorded on the Hyundai I800

The 21 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 I800 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 I800, when they start, and how each registration year compares — including the steps that mark a generation change.

I800 common problems and results by year

How wear changes the picture

I800 pass rate by age and registration year

How often the Hyundai I800 passes at each age, with the years those cars were first registered. Tests are from 2025, so a car aged 6 to 8 was first used in 2017–2019.

6–8 yrsreg. 2017–201968%

9–11 yrsreg. 2014–201658%

12–14 yrsreg. 2011–201354%

15+ yrsreg. 2010 and earlier57%

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 I800 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 I800 fleet

Average mileage recorded at test: 91,175
Fuel mix of tested cars: Diesel100.0%

Check a specific Hyundai I800

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

Similar test volumes

Compare against other makes

Fiat Fiorino — 62.2% adjusted, ranked 243
Subaru Outback — 77.2% adjusted, ranked 84
Porsche Panamera — 87.8% adjusted, ranked 10
Ssangyong Korando — 65.9% adjusted, ranked 213

Common questions

Is the Hyundai I800 reliable?: On MOT evidence the Hyundai I800 is well below average. It passes 61.1% of tests once age and mileage are accounted for, against a national average of 72.3%. That figure covers 79% of the national age and mileage range, which is enough to quote but not to rank. This measures how often the car meets the MOT standard, not how often it breaks down or what a repair costs.
What is the most common MOT failure on a Hyundai I800?: The item recorded most often is "A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning", which appears in 25.5% of failed Hyundai I800 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 I800?: The most common advisory is "Tyre tread depth not in accordance with the requirements", noted on 24.8% of all Hyundai I800 tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Hyundai I800 usually have at its MOT?: The average odometer reading recorded at test is 91,175 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 I800 years are the most reliable?: Going by MOT pass rate, Hyundai I800 cars first registered 2017–2019 do best at 67.8%, and those registered 2010 and earlier do worst at 56.6%. 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 I800 get harder to pass as it ages?: Yes. At 6 to 8 years old, 67.8% of Hyundai I800 tests pass. By fifteen years or more, that falls to 56.6%. Nearly every model follows this pattern, which is why comparing raw pass rates between models is misleading unless age is accounted for.

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. The adjusted rate is directly standardised across twenty-five age and mileage bands and reweighted onto the national distribution, so this model is compared against cars that have lived a similar life rather than against a younger or lighter-used fleet.

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.