Periodic vehicle inspection (KTEO) is an essential process that ensures vehicles on the road meet the required safety and environmental standards. Nevertheless, every year thousands of vehicles receive major observations or fail the inspection due to defects that, in most cases, could have been identified and repaired beforehand.
The most common reasons for failure are not necessarily major mechanical faults. In many cases, something as simple as a burnt-out bulb, worn tyres, brake system issues, or excessive exhaust emissions is enough to require a reinspection. Carrying out a basic preventive check before your KTEO appointment can save time, money, and unnecessary inconvenience.
Below are the ten most common reasons why a vehicle may fail its roadworthiness inspection, along with the key areas drivers should check before visiting a KTEO inspection centre.
1. Lighting System
The vehicle's lighting system is one of the first items inspected, as it plays a vital role in road safety.
Common issues:
Burnt-out bulbs.
Incorrect headlight alignment.
Cloudy or damaged headlamp lenses.
These defects reduce visibility and are among the most common reasons for inspection remarks or failure.
2. Braking System
The braking system is the vehicle's most important active safety system.
Common causes of failure:
Reduced braking performance.
Uneven braking force between the wheels.
Worn brake pads or discs.
These issues can significantly affect the vehicle's ability to stop safely and may result in inspection failure.
3. Suspension and Steering
A properly functioning suspension and steering system ensures stability, comfort, and safe vehicle handling.
Common defects:
Worn shock absorbers.
Worn ball joints.
Worn tie rods.
Damaged suspension bushings.
These faults are frequently identified during technical inspections.
4. Excessive Exhaust Emissions
Exhaust emissions are a key part of the vehicle inspection process.
Possible causes:
Faulty catalytic converter.
Malfunctioning engine sensors.
Problems with the DPF (Diesel Particulate Filter) or EGR (Exhaust Gas Recirculation) systems.
These faults can cause emissions to exceed the legal limits.
5. Tyres
Tyres must:
Have sufficient tread depth.
Show no uneven wear.
Be free from damage.
Using different tyre types or sizes on the same axle may also lead to inspection remarks.
6. Fluid Leaks
Inspectors check for leaks involving:
Engine oil.
Brake fluid.
Coolant.
Fuel.
Fluid leaks affect not only the vehicle's reliability but also safety and environmental protection.
7. Seat Belts
Seat belts must operate correctly at all times.
The inspection includes:
Worn seat belt webbing.
Faulty retractor mechanisms.
Buckles that do not latch securely.
Any of these defects may result in inspection remarks or failure.
8. Windscreen and Wipers
Clear visibility is essential for safe driving.
Inspectors examine:
The condition of the windscreen wipers.
The effectiveness of the wiper blades.
Cracks in the windscreen, especially within the driver's field of vision.
9. Electrical System and Warning Lights
Warning lights illuminated on the dashboard, including:
ABS.
ESP.
SRS (Airbag System).
may indicate faults affecting the vehicle's safety and should be repaired before the inspection.
10. Other Safety Deficiencies
Examples include:
Inoperative horn.
Illegible licence plates.
Severe corrosion affecting the chassis.
Other defects that compromise the safe operation of the vehicle.
These issues may also result in inspection failure.
Regular maintenance and a simple preventive inspection before your scheduled KTEO appointment can significantly reduce the likelihood of failure. More importantly, they help keep your vehicle safe for you, your passengers, and all other road users.
Disclaimer: The information presented in this article is indicative and is based on publicly available technical information, general industry estimates, and professional experience. It does not constitute an official statistical study or formal research.