*This is a collaborative post.
Buying a used car is one of those purchases where the difference between a good deal and a costly mistake often comes down to how much attention you paid before signing anything. Perth’s used car market is active and varied, with options ranging from private sales to established dealerships, and while that gives buyers plenty of choice, it also means the due diligence is entirely on you.
A car that looks clean and drives fine on a test run can still be hiding problems that show up three months later in the form of a repair bill you were not expecting. These five checks will not guarantee a perfect purchase, but they will dramatically improve your odds.
1. Check the Vehicle History Report
Before you get attached to any particular car, run a vehicle history report. In Australia, the standard tool for this is a PPSR check through the Personal Property Securities Register, which tells you whether the car has any money owing on it, whether it has been written off, and whether it has been reported stolen. In some circumstances, a car with finance still attached transfers that debt to the new owner, which is a problem you want to know about before the transaction, not after.
Beyond the PPSR, some history reports include odometer readings over time, which can reveal whether a vehicle’s mileage has been tampered with. If a car with 80,000 kilometers on the clock shows a reading of 120,000 from two years ago, something is wrong, and no explanation from the seller will make that right.
2. Inspect the Body for Signs of Previous Damage
Panel repairs and respray work are common on used cars, and sellers don’t always disclose them. Run your hand along the body panels and look for inconsistencies in the paint surface, slight variations in color under different lighting, or areas where the finish looks thicker or less uniform than the surrounding panels. Misaligned panel gaps, where the door or bonnet does not sit flush with the surrounding body, are another sign that the car has had structural work done.
None of this is automatically a dealbreaker. A car that has had a minor repair done professionally is not necessarily a problem. But a car that has been through significant accident damage and poorly repaired absolutely has, and the seller not mentioning it is a red flag about what else they might not be telling you.
3. Look Underneath and Under the Bonnet
Most buyers spend their time looking at the exterior and interior but skip what is underneath. When checking out cars for sale Perth, make sure to examine under the car for rust, oil leaks, and signs of fluid pooling. This takes two minutes but can save you thousands. Rust on the chassis or subframe in particular is a serious structural concern that does not have a straightforward fix.
Under the bonnet, look at the condition of the coolant and oil. Oil that looks milky or foamy can indicate a head gasket issue, which is one of the more expensive engine repairs available. Check for any fresh oil wiped around the engine bay that might suggest a leak that has been temporarily hidden.
Some local dealerships such as Carmart Perth conduct this kind of pre-sale inspection before a vehicle reaches the lot, but for private sales you are doing this work yourself. Nevertheless, you can still choose to do the inspection yourself even after the dealership has done it for you.
4. Test Drive It Properly
A test drive around the block tells you almost nothing. Take the car on a road where you can reach highway speed, and pay attention to how it feels getting there. Does it pull to one side? Does the steering feel vague or heavy? Are there any vibrations through the steering wheel at speed that were not there at lower speeds? These can indicate wheel alignment issues, worn tyres, or suspension problems.
Test the brakes firmly at a safe opportunity. They should bring the car to a straight, controlled stop without pulling, grinding, or pulsing through the pedal. Listen for any noises that appear under load or during gear changes that were not present when the engine was idling.
A car that sounds different when you are actually driving it than it did sitting in the driveway is telling you something.
5. Have an Independent Mechanic Inspect It
This is the check that buyers most often skip because it costs money and feels unnecessary when the car already seems fine. In practice, it is the most valuable thing you can do. A qualified mechanic can identify problems that are invisible to an untrained eye, including developing issues that are not yet causing obvious symptoms but will become expensive within the next year of driving.
According to the Australian Competition and Consumer Commission, used car complaints are among the most common consumer grievances in the country, and a significant portion of them involve defects that were present at the time of sale. A pre-purchase inspection is the most direct way to reduce that risk, and the cost of one is negligible compared to what it can save you.
Final Thoughts
Used car buying rewards patience and preparation. The cars that turn out to be genuine value are almost always the ones where the buyer did the work upfront rather than trusting that everything would be fine. Run the history check, look carefully at the condition, drive it properly, and get a mechanic’s eyes on it before you commit.
Those steps will not take long, but they will give you a confidence in the purchase that no amount of seller reassurance can match.
