Kia STONIC - 2018
105.5 faults per 100 tests
Year average for all cars of 2018 is 123.2 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Kia STONIC, model year 2018.
Sample size: 7,013 cars, 14,676 tests and 15,483 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: 7,013 cars
The 2018 KIA Stonic shows an overall defect rate of 106 per 100 vehicles, which is 12% lower than the average for cars of the same year. While the Stonic exhibits higher defect rates in the braking category compared to its peers, it excels in areas such as steering, lights and electrics, and body/structure, reporting significantly fewer defects. Mileage trends indicate that as the vehicle ages, defect rates increase, particularly in the highest mileage bracket where the Stonic's rate reaches 325 per 100. Overall, this model stands out for its reliability in several key areas, making it a strong contender in its class.
Cars by mileage segment
Total: 7,013 cars
More model years for Kia STONIC
Other models from Kia
Categories
Brakes
▼ 24.4% worse
85.6 faults / 100 tests
Year avg: 68.8 / 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
▲ 38.0% better
3.1 faults / 100 tests
Year avg: 5.0 / 100 tests
- A steering ball joint: with excessive wear or free play
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
- A steering ball joint: with excessive wear or free play
- Steering rack gaiter or ball joint dust cover: damaged or deteriorated
- Free play in the steering, measured at the rim of the steering wheel is: excessive
Visibility
▲ 7.2% better
12.9 faults / 100 tests
Year avg: 13.9 / 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
- Wiper blade: defective
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Lights & Electrics
▲ 52.3% better
8.4 faults / 100 tests
Year avg: 17.6 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- Headlamp aim unable to be tested
- 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
- 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
Wheels & Suspension
▲ 25.7% better
94.2 faults / 100 tests
Year avg: 126.7 / 100 tests
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- A suspension pin, bush, joint or bearing: excessively worn
- Tyre tread depth not in accordance with the requirements
- 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
Body/Structure
▲ 78.4% better
1.1 faults / 100 tests
Year avg: 5.1 / 100 tests
- A transmission shaft constant velocity joint boot: severely deteriorated
- A door will not open using the relevant control or close properly
- Exhaust system has a major leak or is insecure
- A transmission: joint, belt or chain excessively worn
- Exhaust system has a major leak or is insecure
Equipment
▲ 54.5% better
1.0 faults / 100 tests
Year avg: 2.2 / 100 tests
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- Audible warning:
- A seat belt:
- A seat belt: or flexible stalk damaged
- Seat belt buckle missing, damaged or not functioning as intended
Other
▲ 32.9% better
4.7 faults / 100 tests
Year avg: 7.0 / 100 tests
- Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
- Engine MIL inoperative or indicating a malfunction
- Any part of the noise suppression system: insecure
- Engine MIL inoperative or indicating a malfunction
- 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: 3,986
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 2,301
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 1,809
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 1,594
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 794
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 451
Significant brake effort recorded with no brake applied indicating a binding brake
ADVISORY
Occurrences: 335
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 304
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 226
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 215
Serious faults (Top 10)
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 451
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 304
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 171
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 159
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 130
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 127
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 100
Brake disc or drum: significantly and obviously worn
FAIL
Occurrences: 67
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 55
Excessive fluctuation in brake effort through each wheel revolution
FAIL
Occurrences: 40