Kia STONIC - 2021
53.2 faults per 100 tests
Year average for all cars of 2021 is 80.0 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Kia STONIC, model year 2021.
Sample size: 6,228 cars, 12,332 tests and 6,559 recorded faults.
0%
Less faults compared to the average car of same model year
Less faults compared to the average car of same model year
Quick summary
Total: 6,228 cars
The 2021 KIA Stonic has an overall defect rate of 53 per 100 vehicles, which is significantly lower than the average of 79 per 100, marking a reduction of 32%. This model excels particularly in categories such as Lights & Electrics, where it shows a 63% lower defect rate compared to average, and also performs better in Wheels, Suspensions & Axles, Body/Structure, and Equipment, all with notably lower defect percentages. However, it faces a considerable challenge in the Steering category, where its defect rate is nearly 600% higher than average. Mileage-related trends indicate that defect rates increase with higher mileage, but the Stonic maintains a comparatively strong performance overall.
Cars by mileage segment
Total: 6,228 cars
More model years for Kia STONIC
Other models from Kia
Categories
Brakes
▲ 20.3% better
31.9 faults / 100 tests
Year avg: 40.0 / 100 tests
- Brake lining or pad: worn below 1.5mm
- Brake disc or drum: significantly and obviously worn
- Significant brake effort recorded with no brake applied indicating a binding brake
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
Steering
▼ 628.6% worse
5.1 faults / 100 tests
Year avg: 0.7 / 100 tests
- A steering ball joint: with excessive wear or free play
- Track rod or drag link ends seriously misaligned
- A steering ball joint: with excessive wear or free play
- Free play in the steering, measured at the rim of the steering wheel is: excessive
- Excessive radial movement between the top of the steering column and the shaft indicating an excessively worn top bearing
Visibility
▲ 1.4% better
14.3 faults / 100 tests
Year avg: 14.5 / 100 tests
- Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
- Wiper blade: missing or obviously not clearing the windscreen
- Wiper blade: missing or obviously not clearing the windscreen
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- Wiper blade: defective
Lights & Electrics
▲ 64.3% better
4.0 faults / 100 tests
Year avg: 11.2 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
- A reversing lamp inoperative
- A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
- A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
Wheels & Suspension
▲ 44.6% better
48.4 faults / 100 tests
Year avg: 87.3 / 100 tests
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
- Tyre tread depth not in accordance with the requirements
- A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
- Tyre tread depth not in accordance with the requirements
Body/Structure
▲ 81.0% better
0.4 faults / 100 tests
Year avg: 2.1 / 100 tests
- A main load-bearing structural member: fractured or deformed such that structural rigidity is significantly reduced
- A body panel or body component: damaged or corroded and likely to cause injury when grazed or contacted, or insecure
- A transmission shaft constant velocity joint boot: missing, split, insecure or no longer prevents the ingress of dirt
- A transmission shaft constant velocity joint boot: severely deteriorated
- A door will not open using the relevant control or close properly
Equipment
▲ 60.0% better
0.6 faults / 100 tests
Year avg: 1.5 / 100 tests
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- Audible warning:
- A seat belt: or flexible stalk damaged
- Seat belt buckle missing, damaged or not functioning as intended
- Audible warning:
Other
▲ 40.7% better
1.6 faults / 100 tests
Year avg: 2.7 / 100 tests
- Engine MIL inoperative or indicating a malfunction
- Engine MIL inoperative or indicating a malfunction
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Lambda coefficient outside the default limits or the range specified by the manufacturer
Fault rate by mileage segment
Model
Year average
* Metric: faults per 100 tests.
Most common faults (Top 10)
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 1,594
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 999
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 854
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 379
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 278
A steering ball joint: with excessive wear or free play
ADVISORY
Occurrences: 270
Wiper blade: defective
MINOR
Occurrences: 267
Wiper blade: missing or obviously not clearing the windscreen
PRS
Occurrences: 207
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 189
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 158
Serious faults (Top 10)
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 189
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 139
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 95
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 80
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 77
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 57
A steering ball joint: with excessive wear or free play
FAIL
Occurrences: 35
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 29
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 21
An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 14