Should I check the MOT history before buying a 2018 Hyundai Ioniq?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2018 Hyundai Ioniq?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2018 Hyundai Ioniq?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 2018 Hyundai Ioniq reliable?

Based on MOT data from 7,741 vehicles, the 2018 Hyundai Ioniq has a first-time MOT pass rate of 90.1%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2018 Hyundai Ioniq?

The most frequently recorded MOT issues on the 2018 Hyundai Ioniq are: Nearside Front Tyre worn close to legal limit/worn on edge (34.6% of vehicles), Offside Front Tyre worn close to legal limit/worn on edge (33.9% of vehicles), Offside Rear Tyre slightly damaged/cracking or perishing (20.4% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 2018 Hyundai Ioniq?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Hyundai Ioniq (2018)

7,741 real MOT outcomes analysed • 90.1% first-time pass rate

2018 Hyundai Ioniq

CarHunch analysed 7,741 real MOT records for the 2018 Hyundai Ioniq. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Common Issues Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 2018 Hyundai Ioniq is a reliable choice, passing MOT first time in 87.9% of cases—nearly 8 percentage points above the UK average of 80%. However, 18.5% of these vehicles have recorded a dangerous defect at some point, which is worth noting if you're buying used; hybrid and pure electric variants perform similarly, both around 87–88% pass rate.

At a median mileage of 50,324 miles, these cars are relatively lightly used for their age, and they back that up with low failure rates of 0.76 per vehicle on average. The typical advisory count of 3.9 suggests minor wear and tear rather than structural problems, so when buying one, get a pre-purchase inspection to confirm no hidden dangerous defects and check the service history carefully.

The 2018 Hyundai Ioniq passes its MOT first time at roughly the UK average rate (90.1%) — solid but worth checking this vehicle's history carefully.

⚠️ Around 1 in 8 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

90.1%

UK average ~80%

Better than average

Dangerous (ever)

18.5%

At least once in MOT history

Check this vehicle

Avg failures / car

0.76

Over 6.7 tests on record

Moderate

Typical mileage

50k

Middle half: 35k–72k

For context

✅ Good baseline reliability. A 90.1% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔧 Expect consumable spend. An average of 3.9 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 7,741 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

Average reliability — agree?

What tends to go wrong

Across 7,741 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 34.6%

Nearside Front Tyre worn close to legal limit/worn on edge · Offside Front Tyre worn close to legal limit/worn on edge · Offside Rear Tyre slightly damaged/cracking or perishing · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Brake wear 15.1%

Rear Brake disc worn, pitted or scored, but not seriously weakened · Offside Rear Brake disc worn, pitted or scored, but not seriously weakened · Nearside Rear Brake disc worn, pitted or scored, but not seriously weakened · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Other issues 9.2%

COVID-19 6 MONTH EXTENSION · Nearside Rear Child Seat fitted not allowing full inspection of adult belt

Data covers a 3-year window centred on 2018.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 7,741 Hyundai Ioniq cars.

Before you buy a 2018 Hyundai Ioniq

Based on MOT data from 7,741 vehicles — here's what to check.

📋 Check the full MOT history. 18.5% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Hybrid Electric (Clean) (94%)	7,312	90%	0.78
Electric (5%)	422	91.9%	0.53

Colour Breakdown

Based on 41,372 Hyundai Ioniq vehicles registered in the UK — across all years. From DVLA registration records.

Grey 27.1%

11,202

White 24.4%

10,086

Black 16.3%

6,763

Blue 16.1%

6,660

Silver 11.3%

4,685

Red 3.8%

1,579

Orange 0.7%

275

Brown 0.2%

Yellow 0%

Turquoise 0%

Mileage Distribution

Most 2018 Hyundai Ioniq vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

50,324

typical

34,936

low mileage

72,460

high mileage

Half of all 2018 Hyundai Ioniq vehicles fall between 34,936 and 72,460 miles.

Is the mileage you're seeing normal?

✓ Under 34,936 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 34,936–72,460 miles — normal for age. This is where most 2018 Hyundai Ioniqs sit.

⚠ Over 97,821 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2018 Hyundai Ioniq — Still on the Road

Almost all 2018 Hyundai Ioniqs are still on the road.

Strong survival — 6,884 vehicles still getting MOTs in 2025, 96% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2019–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

6.7

Avg MOT tests per vehicle

0.76

Avg failures per vehicle

3.9

Avg advisories per vehicle

Other model years — Hyundai Ioniq: All Ioniq years → Which year to buy? →

2016 2017 2019 2020 2021 2022

Or browse all models: Hyundai →

Compare with another model

See how the 2018 Hyundai Ioniq stacks up against a rival.

Average reliability — agree?