Kia Niro (2018)
2018 Kia Niro
CarHunch analysed 6,281 real MOT records for the 2018 Kia Niro. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2018 Kia Niro is notably reliable, with an 89.6% first-time pass rate that beats the UK average by nearly 10 percentage points. However, nearly a quarter of these vehicles (23.4%) have experienced a dangerous defect at some point, which is a significant concern for prospective buyers and warrants a thorough pre-purchase inspection.
These Niros are running relatively light mileage for their age—averaging 50,555 miles—suggesting careful ownership, and they're accumulating just 0.84 failures per vehicle on test, which is well-controlled. The high advisory count of 4.6 per car indicates minor wear items need attention, so budget for preventative maintenance on suspension and consumables before problems become expensive.
What to check before buying a 2018 Kia Niro
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- ⚠️ 23.4% of these vehicles have had a dangerous defect recorded. Enter the reg below — the full MOT history will show exactly what was flagged and whether it was resolved.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Kia Niro
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Hybrid Electric (Clean) (100%) | 6,277 | 89.6% | 0.84 |
| Petrol (0%) | 2 | 85.2% | 1.5 |
| Electric (0%) | 1 | 100% | 0 |
| Other (0%) | 1 | 100% | 0 |
Mileage Distribution
Most 2018 Kia Niro vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2018 Kia Niro vehicles fall between 30,065 and 62,419 miles.
2018 Kia Niro — Still on the Road
Strong survival — 6,081 vehicles still getting MOTs in 2025, 100% 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.
MOT History Averages
Most Common MOT Issues — 2018 Kia Niro
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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39.2%
Offside Front Tyre worn close to legal limit/worn on edge
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39.1%
Nearside Front Tyre worn close to legal limit/worn on edge
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25.7%
Nearside Rear Tyre slightly damaged/cracking or perishing
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25.6%
Offside Rear Tyre slightly damaged/cracking or perishing
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14%
Rear Brake disc worn, pitted or scored, but not seriously weakened
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11.6%
Nearside Rear Child Seat fitted not allowing full inspection of adult belt ()
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11.4%
Offside Rear Tyre worn close to legal limit/worn on edge
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9.6%
Offside Rear Brake disc worn, pitted or scored, but not seriously weakened
Data covers a 3-year window centred on 2018. Counts include advisories and failures.
Found a specific Kia Niro?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.