1. Research the Car Before Visiting

Start by researching the make, model, year, engine type and kilometres travelled. Compare similar vehicles so you can identify an asking price that seems unusually low or a mileage figure that needs further explanation.

Read the advertisement carefully and save a copy. Note any promises about service history, accident-free status, registration, roadworthiness or included accessories. Ask the seller why the car is being sold, how long they have owned it and whether it has had significant repairs.

Be cautious if the seller refuses reasonable questions, pressures you to pay immediately, will not allow an inspection or offers a price that seems too good to be true. The Australian Government’s Moneysmart website provides guidance on buying and running a car.

Read the official Moneysmart car-buying guide.

2. Inspect the Car Exterior in Daylight

Walk slowly around the entire vehicle before opening the doors. Natural daylight makes it easier to spot differences in paint colour, dents, scratches and signs of previous repairs.

Look for these warning signs

• Uneven panel gaps: Compare the spacing around the bonnet, doors, boot and headlights. Large differences can indicate previous damage or repairs.
• Different paint shades: Panels that look noticeably different in colour may have been repainted.
• Paint overspray: Paint on rubber seals, plastic trim or other surfaces that should not be painted may suggest repair work.
• Rust: Examine door edges, wheel arches, the lower body and visible metal surfaces.
• Cracked lights and glass: Look for damaged headlight covers, cracked windows and chipped windscreens.
• Uneven stance: If one corner appears noticeably lower than the others, further suspension checks may be necessary.
• Tyre condition: Look for uneven wear, cuts, bulges and tyres that appear different from one side to the other.

None of these signs proves that a vehicle is unsafe or has suffered a serious accident. They are reasons to ask questions and obtain an independent assessment before buying.

3. Check for Signs of Flood or Water Damage

Flood damage can be difficult to identify because a vehicle may have been cleaned or repaired before it is advertised. Inspect accessible areas carefully without dismantling the car or interfering with electrical components.

• Look for a musty smell inside the cabin or boot.
• Check carpets and floor mats for unexplained dampness, stains or unusual discolouration.
• Look for corrosion on accessible metal fittings and unusual residue in hidden corners.
• Check beneath the boot floor and around the spare-wheel well, if safely accessible.
• Look for inconsistent upholstery, replacement trim or signs of extensive interior cleaning.
• Ask directly whether the car has been exposed to flooding or major water damage.

One sign alone is not proof of flood damage, and a clean interior does not guarantee that the vehicle has never been flooded. A vehicle-history search can reveal some recorded information, but it cannot identify every past incident.

4. Inspect the Interior and Test the Controls

Sit in the driver’s seat and inspect the interior before starting the engine. Compare the condition of the steering wheel, pedals, driver’s seat and other frequently touched surfaces with the advertised kilometres. Heavy wear may deserve an explanation, although wear varies by vehicle and use.

Test the following items

• Seat adjustment and seat belts.
• Door locks, windows and mirrors.
• Headlights, high beams, indicators and hazard lights.
• Brake lights, reversing lights and number-plate lights, with help from another person if needed.
• Windscreen wipers and washers.
• Air conditioning and heating.
• Horn, dashboard displays and infotainment controls.
• Central locking, spare key and any advertised safety or driver-assistance features.

When the ignition is switched on, observe the dashboard warning lights. Some lights should illuminate during the initial system check and then go out after starting. A warning that remains on, or a light that appears not to operate as expected, requires investigation.

Do not ignore an airbag, ABS, brake or engine warning. Ask for the problem to be diagnosed before proceeding with the purchase.

5. Look Under the Bonnet Safely

Ask the seller to show you the engine bay. If possible, inspect the vehicle before the engine has been warmed up. A cold start may reveal symptoms that are less obvious after the engine warms, although not all faults can be detected this way.

Park on level ground and follow the vehicle manufacturer’s safety instructions. Do not touch hot engine parts, remove a hot radiator cap or reach near moving belts and fans.

What to look for

• Leaks: Look for fresh oil, coolant or other fluid around accessible areas and beneath the parked vehicle.
• Fluid condition: If it is safe and you know how, check the levels and appearance of fluids according to the owner’s manual.
• Hoses and visible wiring: Look for obvious damage, loose parts or signs of amateur repairs.
• Corrosion: Examine accessible metal parts for unusual rust or damage.
• Unusual smells: A strong fuel smell, burning smell or persistent coolant smell needs professional attention.
• Recent cleaning: An unusually spotless engine bay is not proof of a problem, but ask why it has been cleaned if there are other signs of leakage.

Never put your hands near moving engine components. Do not attempt repairs or dismantle covers during a viewing. A visual inspection cannot determine the internal condition of the engine, transmission or other major components.

6. Check the Tyres and Brakes

Tyres provide useful clues about maintenance and possible alignment or suspension issues. Check all four tyres, including the spare if one is supplied.

• Look for uneven tread wear across the width of each tyre.
• Check for cuts, exposed cords, bulges or other visible damage.
• Check the tread and condition against applicable legal and safety requirements.
• Confirm that the tyres fitted are appropriate for the vehicle.
• Look for visible damage to wheels and ask about any steering vibration or pulling.

During a permitted test drive, notice whether the brakes feel consistent and whether the car pulls to one side, vibrates or makes unusual noises. Do not conduct aggressive braking tests or drive a car that appears unsafe.

If you identify damaged tyres, a soft or abnormal brake pedal, severe vibration or braking problems, stop the test drive safely and arrange professional assessment. Visual checks alone cannot establish brake condition or remaining service life.

7. Check the Service History and Odometer Records

Ask for the service book, maintenance invoices, owner’s manual and available repair records. A consistent service history helps you understand how the car has been maintained, but a stamped book alone does not guarantee good mechanical condition.

Compare available dates and kilometre readings across service invoices, inspection reports and other records. Look for unexplained gaps, inconsistent readings or claims that cannot be supported by documents.

Ask the seller about:

• Regular servicing and the last completed service.
• Major maintenance due soon under the manufacturer’s schedule.
• Timing belt replacement, if applicable.
• Transmission, cooling system or other significant repairs.
• Accident repairs, insurance claims and previous water damage.
• Any warning lights, recurring faults or current mechanical issues.

A PPSR search does not verify the odometer reading or provide a complete ownership history. Ask for supporting records and have any uncertainty assessed before buying.

8. Match the VIN With the Vehicle Documents

The Vehicle Identification Number (VIN) identifies the vehicle. On many modern cars it is a 17-character combination of letters and numbers. Its location varies, but common places include the lower windscreen, driver’s door area and engine bay.

Compare the VIN shown on the vehicle with the registration paperwork and the VIN used for the vehicle-history search. Check the make, model and other available identifying details as well.

If the numbers do not match, appear altered or cannot be explained, do not proceed until the discrepancy has been resolved through the appropriate authorities. Do not rely solely on the number plate for a PPSR vehicle search.

9. Complete an Official PPSR Search Before Paying

Australia’s Personal Property Securities Register (PPSR) provides an important check before buying a used vehicle. An official search can reveal whether a security interest is recorded against the vehicle and can include recorded stolen or written-off information.

A security interest may mean that money is still owed against the car and the vehicle could be at risk of repossession. If a registration appears, resolve the matter with the seller and relevant secured party before purchasing.

Remember that a PPSR search is not a full mechanical inspection and does not provide every detail about a car’s history. It does not confirm that the odometer is accurate, that all repairs were completed properly or that the vehicle is mechanically safe.

For help understanding the results, read the official PPSR search-result guide.

10. Check Registration and State or Territory Requirements

Registration, transfer and inspection rules vary across Australia. Before paying, confirm the vehicle’s registration status and the requirements that apply in the state or territory where it will be registered.

Depending on the jurisdiction and the circumstances of the sale, a roadworthiness or safety inspection certificate may be required. Do not assume that a vehicle registered in one state automatically satisfies every requirement in another.

Use the relevant state or territory government transport website to verify registration, transfer and inspection requirements. For example, the NSW Government used-vehicle buying guide explains checks and documentation for buyers in New South Wales.

11. Take a Safe Test Drive

A test drive helps you notice symptoms that are not obvious while the vehicle is parked. Obtain the seller’s permission and make sure the car is legally registered or otherwise lawfully permitted on the road, and that appropriate insurance arrangements are in place.

If you are unfamiliar with the vehicle, ask the seller to accompany you. Choose a safe route that allows normal driving at appropriate speeds without putting anyone at risk.

During the test drive, notice:

• Whether the engine starts without unusual difficulty.
• Whether warning lights remain illuminated.
• Whether acceleration is smooth under normal driving conditions.
• Whether the transmission changes gears as expected.
• Whether the steering feels stable and the vehicle tracks normally.
• Whether the brakes operate consistently without severe vibration or unusual sounds.
• Whether there are knocking, grinding, rattling or other unexplained noises.
• Whether the engine temperature remains within its normal operating range.
• Whether the air conditioning and other controls continue to work.

Stop safely if a serious warning appears, the brakes or steering feel unsafe, the engine overheats or another major problem develops. Do not attempt to diagnose or repair a fault while driving.

12. Calculate the Total Cost Before Making an Offer

The purchase price is only one part of owning a car. Before deciding what you can afford, account for registration, transfer charges, insurance, fuel or charging, routine servicing, tyres, parking and potential repairs.

If the vehicle needs tyres, a service or other work soon, obtain realistic estimates before negotiating. Do not assume a low asking price makes up for an unknown mechanical fault.

Set a maximum budget and keep money available for unexpected expenses. If the seller refuses a reasonable inspection or you cannot establish the vehicle’s condition, consider walking away rather than taking a financial risk.

Red Flags: When You Should Walk Away

If you suspect the vehicle is stolen or the identification details have been altered, stop the purchase and contact the relevant state or territory authorities. Do not attempt to resolve a potentially fraudulent transaction by paying the seller extra money.

Can You Buy a Used Car Safely Without a Mechanic?

You can perform a useful preliminary inspection without a mechanic, and it may help you reject a car with obvious problems before spending money on further checks. However, many serious defects cannot be confirmed through a visual inspection or a short test drive.

A qualified independent mechanic can inspect systems that are difficult for a buyer to assess, including the engine, transmission, suspension, brakes and underlying structural condition. A professional inspection may also identify maintenance or repair needs that affect the value of the vehicle.

For a major purchase, the safest approach is to complete your own checklist first, verify the official vehicle records, and then arrange an independent pre-purchase inspection before signing a final agreement or paying the full amount.

Frequently Asked Questions

Final Thoughts

Inspecting a used car yourself can help you identify obvious warning signs and make a more informed decision. Take your time, inspect the vehicle in daylight, verify its VIN and paperwork, review service records and complete the official PPSR check before paying.

Do not let a clean appearance, low price or confident seller replace proper verification. If anything seems suspicious or you discover a significant fault, pause the purchase and seek professional advice.

The most practical approach is to use your own checklist as the first screening step and then arrange a qualified independent inspection before committing to a major purchase.