Kia OPTIMA - 2018
118.4 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 OPTIMA, model year 2018.
Sample size: 2,744 cars, 6,130 tests and 7,255 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: 2,744 cars
The 2018 KIA Optima has an overall defect rate of 118 per 100 vehicles, slightly below the average of 120 per 100 vehicles for that year. Notably, the Optima performs significantly better than average in categories such as steering, lights and electrics, body structure, and equipment, with defect rates considerably lower than those of similar models. However, it shows a higher rate of defects in the brakes category, where it has a rate of 95 defects per 100 vehicles compared to the average of 67. Mileage trends indicate that the defect rate increases with mileage, particularly in the higher mileage segments. Overall, while the Optima excels in several areas, its brake performance warrants attention.
Cars by mileage segment
Total: 2,744 cars
More model years for Kia OPTIMA
Other models from Kia
Categories
Brakes
▼ 38.5% worse
95.3 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
- Brake pipe damaged or excessively corroded
- Brake disc or drum: insecure, fractured or otherwise likely to fail
- Brake lining or pad: worn below 1.5mm
Steering
▲ 72.0% better
1.4 faults / 100 tests
Year avg: 5.0 / 100 tests
- 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
- 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.
- Steering rack gaiter or ball joint dust cover: missing or no longer prevents the ingress of dirt etc.
Visibility
▲ 8.6% better
12.7 faults / 100 tests
Year avg: 13.9 / 100 tests
- Wiper blade: defective
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen
- 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
Lights & Electrics
▲ 43.8% better
9.9 faults / 100 tests
Year avg: 17.6 / 100 tests
- The aim of a headlamp is not within limits laid down in the requirements
- The aim of a headlamp is not within limits laid down in the requirements
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has only one lamp or all lamps not working
- A rear registration plate lamp or light source missing or inoperative: when rear registration plate has 2 or more lamps or light sources
- A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
Wheels & Suspension
▲ 14.8% better
108.0 faults / 100 tests
Year avg: 126.7 / 100 tests
- Tyre tread depth not in accordance with the requirements
- 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
- A tyre: with a lump, bulge or tear … or with cords exposed or damaged
- Tyre tread depth not in accordance with the requirements
Body/Structure
▲ 49.0% better
2.6 faults / 100 tests
Year avg: 5.1 / 100 tests
- Exhaust system has a major leak or is insecure
- Fuel system: leaking, or missing or ineffective filler cap
- Fire risk due to fuel tank shield or exhaust shield missing where fitted as original equipment
- A transmission shaft constant velocity joint boot: severely deteriorated
- A driver’s seat: fore and aft adjustment mechanism not working as intended
Equipment
▲ 40.9% better
1.3 faults / 100 tests
Year avg: 2.2 / 100 tests
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction
- A seat belt:
- Seat belt buckle missing, damaged or not functioning as intended
- A seat belt: webbing or flexible stalk significantly stretched or weakened
- A seat belt: or flexible stalk damaged
Other
▲ 21.4% better
5.5 faults / 100 tests
Year avg: 7.0 / 100 tests
- Engine MIL inoperative or indicating a malfunction
- Any part of the noise suppression system: insecure
- 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
- Smoke opacity levels exceed the manufacturer’s specified limit
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: 2,000
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 1,014
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 722
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 529
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 262
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 221
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 158
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 153
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 147
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 145
Serious faults (Top 10)
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 221
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 158
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 147
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 81
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 48
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 44
Brake disc or drum: significantly and obviously worn
FAIL
Occurrences: 32
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 32
Parking brake control missing, defective or inoperative
FAIL
Occurrences: 27
Excessive fluctuation in brake effort through each wheel revolution
FAIL
Occurrences: 23