Kia Stonic Maxx (2020)
2020 Kia Stonic Maxx
CarHunch analysed 451 real MOT records for the 2020 Kia Stonic Maxx. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2020 Kia Stonic Maxx is a genuinely reliable proposition—its 92.4% first-time pass rate sits well above the UK average of 80%, and only 9.5% of vehicles have ever recorded a dangerous defect, which is low enough that safety isn't a material concern for buyers. With a median mileage of just 25,135 miles for a car that's now four years old, these are lightly driven examples that haven't been thrashed, which partly explains the strong pass rate.
The average car racks up 0.32 failures and 2.2 advisories per test, suggesting maintenance issues are minor and infrequent—typical wear-and-tear rather than structural problems. If you're considering one, get a pre-purchase inspection to check those 2.2 advisory items (often brake pads, wipers, or lights) and you'll have a solid, low-mileage city car that should serve reliably.
What to check before buying a 2020 Kia Stonic Maxx
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.
- 📄 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 Stonic Maxx
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 |
|---|---|---|---|
| Petrol (98%) | 440 | 92.3% | 0.33 |
| Other (2%) | 11 | 100% | 0 |
Mileage Distribution
Most 2020 Kia Stonic Maxx 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 2020 Kia Stonic Maxx vehicles fall between 17,707 and 34,450 miles.
2020 Kia Stonic Maxx — Still on the Road
Strong survival — 439 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 2023–2025.
MOT History Averages
Found a specific Kia Stonic Maxx?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.
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