Common Reasons Cars Fail a Roadworthy Inspection

A roadworthy inspection is essential for ensuring that a vehicle is safe to drive. Whether you are selling a car, re-registering it, or simply keeping it in compliance with regulations, passing the inspection is crucial. However, many cars fail due to avoidable issues. Knowing these common reasons can help you prepare and prevent unnecessary repairs or delays.

1. Faulty Brakes

Brakes are one of the most critical safety components of a vehicle. Inspectors check brake pads, rotors, and the braking system’s overall effectiveness. Common brake issues include:

Worn-out brake pads: If they are too thin, they need replacement.
Warped or damaged rotors: Uneven surfaces can affect braking efficiency.
Leaking brake fluid: A leak in the system reduces braking power.
Handbrake issues: A weak or malfunctioning handbrake can lead to failure.

How to Avoid This Failure:

Have your brakes inspected regularly and replace worn-out parts before they become a problem.

2. Worn-Out Tires

Tires play a vital role in vehicle safety and performance. If your tires do not meet legal requirements, your car will fail the inspection. Common tire problems include:

Insufficient tread depth: The legal minimum in most regions is 1.5mm.
Uneven wear: Misalignment or suspension issues can cause this.
Visible damage: Cracks, bulges, or punctures indicate a need for replacement.

How to Avoid This Failure:

Check tire pressure and tread depth regularly. Rotate tires as recommended to ensure even wear.

3. Suspension and Steering Problems

A vehicle’s suspension system ensures stability and comfort while driving. Inspectors assess components such as shocks, struts, ball joints, and tie rods. Common suspension and steering issues include:

Worn-out shock absorbers: These affect handling and ride comfort.
Loose or damaged ball joints: They impact steering control.
Leaking power steering fluid: This can lead to steering failure.

How to Avoid This Failure:

If you notice excessive bouncing, unusual noises, or difficulty steering, get the suspension checked immediately.

4. Faulty Lights and Indicators

Lighting issues are a common reason for roadworthy inspection failures. Inspectors check headlights, brake lights, indicators, and interior lights. Common problems include:

Burnt-out bulbs
Cracked or fogged-up lenses
Incorrectly aimed headlights
Non-functioning indicators or hazard lights

How to Avoid This Failure:

Regularly check all lights and replace any faulty bulbs. Ensure headlights are properly aligned to prevent blinding other drivers.

5. Windscreen and Wipers Issues

A clear view of the road is essential for safe driving. Any damage to the windscreen or faulty wipers can result in failure. Inspectors look for:

Cracks or chips in the windscreen: Damage in the driver’s line of sight is a major concern.
Faulty wipers: Wipers must effectively clear the windscreen.
Low washer fluid levels: A simple issue that can cause failure.

How to Avoid This Failure:

Repair windscreen damage early to prevent cracks from spreading. Replace worn-out wipers and keep the washer fluid topped up.

6. Exhaust and Emissions Problems

Your car’s exhaust system plays a key role in reducing pollution and noise. If it fails the emissions test, you will not pass the roadworthy inspection. Common issues include:

Excessive smoke: Blue, black, or white smoke indicates an engine or fuel issue.
Leaking exhaust pipes: Holes or rust in the system can increase emissions.
Faulty catalytic converter: This component reduces harmful emissions.

How to Avoid This Failure:

Get regular engine check-ups, fix exhaust leaks, and ensure your car meets emission standards.

7. Fluid Leaks

Leaks can be dangerous and indicate a mechanical problem. Inspectors check for leaks in:

Engine oil
Brake fluid
Coolant
Transmission fluid
Power steering fluid

How to Avoid This Failure:

If you notice stains under your car, get it checked immediately. Fixing minor leaks early can prevent major failures.

8. Structural Damage and Rust

Inspectors check for any structural weaknesses that could compromise safety. This includes:

Rust in critical areas: If rust affects the chassis or key structural points, it is a major issue.
Body damage: Deep dents or misaligned panels may indicate previous accidents.

How to Avoid This Failure:

Regularly inspect the car for rust spots and address them promptly. Keep the undercarriage clean, especially in coastal areas where salt accelerates rusting.

9. Seatbelts and Airbags Malfunctions

Safety restraints must be in perfect working order. Issues that can lead to failure include:

Frayed or damaged seatbelts
Non-functioning seatbelt retractors
Airbag warning lights

How to Avoid This Failure:

Ensure seatbelts retract properly and replace any that show signs of wear. If the airbag light is on, get a diagnostic check.

10. Faulty Horn or Electrical Issues

Your car’s horn is a basic safety feature. If it does not work properly, your car may fail the inspection. Other electrical failures, such as non-functional dashboard lights or power windows, may also raise concerns.

How to Avoid This Failure:

Test your horn and dashboard functions regularly. Address any electrical issues promptly to avoid more significant problems.

Conclusion

Failing a roadworthy inspection can be frustrating and costly. However, many issues are preventable with regular maintenance and early repairs. Checking brakes, tires, lights, fluids, and safety components beforehand can help ensure your car passes the inspection. Keeping your vehicle in good condition not only helps with compliance but also improves overall safety and performance.

Author Bio:

Emily Logue | Automotive Specialist
Senior Automotive Expert at Cash for Unwanted Cars Brisbane, helping car owners navigate the selling and recycling process.

Address: 4 Duntroon St, Brendale QLD 4500, Australia

Phone: 0405553001