2025 MOT results
Hyundai i800 common problems
The most common reason a Hyundai i800 fails its MOT is a sidelight out, on 24.0% of its 2,956 failed tests in 2025. Against other cars of the same age, 8 faults stand out, the widest gaps being: a braking fault at 7.0% of failures against 1.2% expected; a sidelight out at 24.0% of failures against 5.7% expected; a number plate lamp out at 12.1% of failures against 2.9% expected.
- Tests in 2025 7,916 Cars aged three and over
- Failed first time 37.3% 2,956 tests
- Found a dangerous defect 8.4% Unsafe to drive away
- Ended with an advisory 52.6% A problem to watch, not a failure
What fails a Hyundai i800 MOT
Each bar is the share of failed Hyundai i800 tests with that defect. Where we can compare it with cars of the same registration years, the marker shows what an average car of those ages records (12 of the 12 items below).
Most common reasons for failure
A test can fail for more than one defect, so shares add up to more than 100%.
| Defect | Share of failed tests |
|---|---|
| Position lamp: not working Lamps, reflectors and electrical equipment | 24.0% |
| Headlamp: not working on dipped beam Lamps, reflectors and electrical equipment | 14.4% |
| Headlamp aim: projected beam image is obviously incorrect Lamps, reflectors and electrical equipment | 12.9% |
| Registration plate lamp(s): inoperative in the case of a single lamp or all lamps Lamps, reflectors and electrical equipment | 12.1% |
| Malfunction indicator lamp: inoperative or indicates a malfunction Noise, emissions and leaks | 10.8% |
| Parking brake efficiency below requirements Brakes | 9.4% |
| Brake pads: less than 1.5 mm thick Brakes | 8.1% |
| Headlamp aim: too high Lamps, reflectors and electrical equipment | 7.5% |
| Parking brake performance: inoperative on one side Brakes | 7.0% |
| Stop lamp: not working Lamps, reflectors and electrical equipment | 6.8% |
| Wipers: does not clear the windscreen effectively Visibility | 6.7% |
| Tyres: tread depth below requirements of 1.6mm Tyres | 6.2% |
Source:DVSA,UK Motoring analysis 2025 Updated
-
Sidelight out
24.0% of failures 5.7% expected 4.2 times as often
A sidelight, also called a position lamp, not working. It marks the width of the car at night.
Walk round the car with the lights on and the hazards going; these are the cheapest failures to avoid.
-
Headlamp out
14.4% of failures 4.7% expected 3.1 times as often
A headlamp out on dipped beam, which is the beam the test checks.
Both bulbs age at the same rate, so a pair usually goes within months of each other.
-
Headlamp aim out of line
12.9% of failures 3.1% expected 4.2 times as often
The beam pattern points too high, too low, or in the wrong place, so it either dazzles others or lights too little road.
Nothing to do at the roadside, but a garage resets the aim in minutes; a sagging suspension corner or a heavy boot load can throw it out.
-
Number plate lamp out
12.1% of failures 2.9% expected 4.2 times as often
The lamp over the rear number plate not working, so the plate cannot be read at night.
Walk round the car with the lights on and the hazards going; these are the cheapest failures to avoid.
-
Engine management light on
10.8% of failures 5.2% expected 2.1 times as often
The engine management light is on, or has been disconnected. Either fails the test.
A cheap code reader on the diagnostic socket will say what the car has stored before you pay for a test.
-
Weak handbrake
9.4% of failures 2.7% expected 3.5 times as often
The handbrake cannot hold the car to the efficiency the test requires, usually from a stretched cable or seized rear callipers.
On a hill, the handbrake should hold the car with a couple of clicks left in the lever.
Which parts of the car fail
Lamps, reflectors and electrical equipment is the area that most often fails a Hyundai i800, on 64.6% of failed tests. That is also where it differs most from cars of the same registration years, which record 31.4%.
Failure categories
DVSA's own sections of the test. The marker is what cars of the same registration years record.
| Defect category | Share of failed tests |
|---|---|
| Lamps, reflectors and electrical equipment | 64.6% |
| Brakes | 32.8% |
| Suspension | 15.9% |
| Tyres | 15.1% |
| Visibility | 14.3% |
| Noise, emissions and leaks | 14.0% |
| Steering | 5.6% |
| Body, chassis, structure | 3.9% |
Source:DVSA,UK Motoring analysis 2025 Updated
What testers warn about
52.6% of Hyundai i800 tests ended with at least one advisory: a fault the tester found that did not fail the test. On Hyundai i800s, these are the items to ask about on a car you are viewing, because they are what the last tester expected to go next.
Most common advisories
Share of all tests, passes included.
| Advisory | Share of tests |
|---|---|
| Tread depth: worn close to legal limit or worn on edge Tyres | 19.3% |
| Brake pads: wearing thin Brakes | 12.5% |
| Brake discs: worn, pitted or scored, but not seriously weakened Brakes | 9.9% |
| Engine oil leak, but not excessive Noise, emissions and leaks | 6.0% |
| Child seat fitted not allowing full inspection of adult belt Non-component advisories | 5.2% |
| Rigid brake pipes: corroded, covered in grease or other material Brakes | 4.6% |
| Tyres: slightly damaged or cracking or perishing Tyres | 4.3% |
| Seat belts: webbing slightly damaged or frayed Seat belts and supplementary restraint systems | 3.9% |
| Brake discs: worn, but not excessively Brakes | 3.7% |
| Linkage ball joint has slight play Suspension | 2.8% |
| Service brake performance: binding but not excessively Brakes | 2.8% |
| Coil spring: corroded Suspension | 2.3% |
Source:DVSA,UK Motoring analysis 2025 Updated
Hyundai i800 problems: common questions
What is the most common problem with a Hyundai i800?
Of the faults that fail an MOT, “Position lamp: not working” is the most common: it appears on 24.0% of failed Hyundai i800 tests. Across categories, lamps, reflectors and electrical equipment is the area that most often fails one, on 64.6% of failed tests.
How often does a Hyundai i800 fail its MOT?
37.3% of Hyundai i800 tests in 2025 were not passed first time, from 7,916 tests of cars aged three and over. Allowing for the age and mileage of the cars tested, that gives it a UK Motoring Reliability Score of 30 out of 100, where 50 is as expected.
Does anything fail more often on a Hyundai i800 than on other cars?
Yes. “Parking brake performance: inoperative on one side” appears on 7.0% of its failures against 1.2% for cars of the same age, and “Position lamp: not working” appears on 24.0% of its failures against 5.7% for cars of the same age. Where an item is missing from the national figures for a year, we use the smallest share those figures show, so the comparison never overstates the difference.
Are these the same as breakdowns or known faults?
No. These are the items a tester recorded at the MOT, which covers condition and safety: lamps, brakes, tyres, suspension, corrosion and emissions. A gearbox that is unpleasant, an infotainment screen that has died, or a car that will not start on a cold morning are not part of the test, so they are not in these figures.
Where do the figures come from?
Every normal MOT test of a Hyundai i800 aged three and over in Great Britain in 2025, from DVSA's anonymised MOT results. Retests are excluded, and the same fault on more than one wheel counts once.
Data stories to read next
Data sources and methodology
| Figures | Source | Period | Records | Updated |
|---|---|---|---|---|
| MOT defects and advisories | Anonymised MOT tests and results Driver and Vehicle Standards Agency Derived statistics UK Motoring | 2025 | 7,916 MOT tests | 19 September 2026 |
- Shares for defects are of failed tests; shares for advisories are of all tests. A test can carry several defects, so shares add to more than 100%.
- The expected share is what an average car of the same registration years records, weighted by where this model’s failures fall. Where an item is outside the national figures for a year, the smallest share those figures show is used in its place, which is an upper bound, so the comparison never overstates a model’s problems. No expectation is published where less than 80% of the model’s failures can be compared.
- Great Britain only: DVSA does not run MOT testing in Northern Ireland. Cars under three years old are not tested.
- The descriptions of what each part does are general and the same on every model. Every figure comes from the MOT data.
Contains public sector information licensed under the Open Government Licence v3.0.