Should I check the MOT history before buying a 2021 Kia Stonic GT Line Isg MHEV S A?

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 2021 Kia Stonic GT Line Isg MHEV S A?

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 2021 Kia Stonic GT Line Isg MHEV S A?

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 2021 Kia Stonic GT Line Isg MHEV S A reliable?

Based on MOT data from 323 vehicles, the 2021 Kia Stonic GT Line Isg MHEV S A has a first-time MOT pass rate of 94.8%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 2021 Kia Stonic GT Line Isg MHEV S A?

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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Kia Stonic GT Line Isg MHEV S A (2021)

323 real MOT outcomes analysed • 94.8% first-time pass rate

2021 Kia Stonic GT Line Isg MHEV S A

CarHunch analysed 323 real MOT records for the 2021 Kia Stonic GT Line Isg MHEV S A. 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 Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution MOT Averages Colour Breakdown Compare Models

Moderate sample. 323 vehicles on record. Figures are indicative — the specific vehicle's history matters more than these averages.

The 2021 Kia Stonic GT-Line is significantly more reliable than the UK average, with a 93.9% first-time pass rate versus 80% nationally—this hybrid is working as intended. Only 5% of vehicles have ever recorded a dangerous defect, which is reassuringly low and suggests no systemic safety issues with this model.

These cars are running relatively low mileage for their age at 20,763 miles median, which inflates the pass rate somewhat; expect performance to trend closer to average as mileage accumulates. The 0.17 average failures per vehicle is excellent, though advisories average 0.8, so budget for minor wear items like brake pads and filters—get a full pre-purchase inspection report to check what's been flagged on your specific car.

The 2021 Kia Stonic GT Line Isg MHEV S A passes its MOT first time more often than most UK vehicles (94.8% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

First-time pass

94.8%

UK average ~80%

Better than average

Dangerous (ever)

At least once in MOT history

Check this vehicle

Avg failures / car

0.17

Over 2.2 tests on record

Low

Typical mileage

21k

Middle half: 14k–29k

For context

✅ Good baseline reliability. A 94.8% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

These stats describe 323 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.

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See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 323 Kia Stonic GT Line Isg MHEV S A cars.

Before you buy a 2021 Kia Stonic GT Line Isg MHEV S A

Based on MOT data from 323 vehicles — here's what to check.

📋 Check the full MOT history. 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) (100%)	322	94.8%	0.16

Colour Breakdown

Based on 858 Kia Stonic GT Line Isg MHEV S A vehicles registered in the UK — across all years. From DVLA registration records.

Blue 26.5%

227

Grey 23.8%

204

Black 15.3%

131

White 14%

120

Red 13.5%

116

Yellow 7%

Mileage Distribution

Most 2021 Kia Stonic GT Line Isg MHEV S A 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.

20,763

typical

14,241

low mileage

29,129

high mileage

Half of all 2021 Kia Stonic GT Line Isg MHEV S A vehicles fall between 14,241 and 29,129 miles.

Is the mileage you're seeing normal?

✓ Under 14,241 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.

✓ 14,241–29,129 miles — normal for age. This is where most 2021 Kia Stonic GT Line Isg MHEV S As sit.

⚠ Over 39,324 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

MOT History Averages

2.2

Avg MOT tests per vehicle

0.17

Avg failures per vehicle

0.8

Avg advisories per vehicle

Other model years — Kia Stonic GT Line Isg MHEV S A: All Stonic GT Line Isg MHEV S A years → Which year to buy? →

2022 2023

Or browse all models: Kia →

Compare with another model

See how the 2021 Kia Stonic GT Line Isg MHEV S A stacks up against a rival.

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