2018 Hyundai I800: common problems and MOT failures
What MOT testers find on the Hyundai I800 first registered in 2018: we looked at the 3,528 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.
What goes wrong more than usual on a 2018 Hyundai I800?
Parts flagged at MOT more often on the 2018 Hyundai I800 than on all cars registered in 2018.
- Number plate lights7.6× usualHyundai I80010.7% All 2018 cars1.4%
Failed outright at MOT: 4%, against 0.5% of all 2018 cars. The rest were advisories or minor defects.
Rough price £5–£40 our estimateAt the viewing: Check the number plate lights work and the plates are clean and legal.
- Headlight aim6.7× usualHyundai I80010.7% All 2018 cars1.6%
Failed outright at MOT: 10.7%, against 1.6% of all 2018 cars. The rest were advisories or minor defects.
Rough price £20–£60 our estimateAt the viewing: Park facing a wall at night or in a garage and check both headlight beams sit level. Aim is a cheap adjustment.
- Sidelights14× usualHyundai I8008.4% All 2018 cars0.6%
Failed outright at MOT: 8.2%, against 0.5% of all 2018 cars. The rest were advisories or minor defects.
Rough price £10–£80 our estimateAt the viewing: Ask a friend to check every light while you work the switches: indicators, brake lights, fog lights and reversing lights.
- Headlights7.3× usualHyundai I8007.3% All 2018 cars1%
Failed outright at MOT: 7.1%, against 0.9% of all 2018 cars. The rest were advisories or minor defects.
Rough price £40–£400 our estimateAt the viewing: Check both headlights on dipped and full beam, and look for cloudy or cracked lenses.
- Brake pads1.6× usualHyundai I80017.7% All 2018 cars10.9%
Failed outright at MOT: 3.7%, against 2% of all 2018 cars. The rest were advisories or minor defects.
Rough price £75–£175 (one axle) ClickMechanicAt the viewing: Listen for squealing or grinding when braking, and look through the wheel at how much pad is left.
Common 2018 Hyundai I800 MOT failures and advisories
The share of 2018 Hyundai I800 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Lights and electrics30% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Brakes27% of testsRough price £150–£350
At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.
- Tyres26% of testsRough price £70–£150
At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.
- Wipers, windscreen and mirrors8% of testsRough price £15–£250
At the viewing: Check for chips in the driver's view, and test the wipers and washers.
- Seats and seatbelts5% of testsRough price £80–£250
At the viewing: Pull each seatbelt sharply. It should lock, and retract cleanly.
- Suspension3% of testsRough price £120–£400
At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.
Questions to ask the seller before buying a 2018 Hyundai I800
Ask before you travel to see it. A seller who knows the car will have answers, and receipts.
- Any recent work on the number plate lights? (Flagged at MOT 7.6× as often on the 2018 Hyundai I800 as on other cars the same age.)
- Any recent work on the headlight aim? (Flagged at MOT 6.7× as often on the 2018 Hyundai I800 as on other cars the same age.)
- Any recent work on the sidelights? (Flagged at MOT 14× as often on the 2018 Hyundai I800 as on other cars the same age.)
- Can I see the service history and receipts for any big jobs?
Looking at a Hyundai I800?
Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.
Other years
Every year of the Hyundai I800 compared
| Year | MOT tests | Most flagged |
|---|---|---|
| 2020 | 220 | Lights and electrics 28% |
| 2019 | 5,407 | Lights and electrics 25% |
| 2017 | 4,030 | Lights and electrics 34% |
| 2016 | 3,146 | Lights and electrics 37% |
| 2015 | 451 | Lights and electrics 39% |
| 2014 | 457 | Brakes 42% |
| 2013 | 621 | Brakes 44% |
| 2012 | 2,811 | Brakes 47% |
| 2011 | 1,527 | Brakes 47% |
| 2010 | 1,277 | Brakes 49% |
| 2009 | 480 | Lights and electrics 54% |
| 2008 | 344 | Lights and electrics 47% |
Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Hyundai I800 cars first registered in 2018. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score