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Buying a Used Car in Perth? Check These Warning Signs

BE BFA Editorial·8 Sept 2026·6 min read

A well-presented car tells you almost nothing. Detailing costs a couple of hundred dollars and covers a great deal, which is why the vehicle that photographs beautifully and drives quietly around the block can still have three thousand dollars of work waiting inside it. The problems that matter are rarely visible from the driver's seat on a short test drive.

What does reveal them is a specific set of checks, most of which take minutes and none of which require mechanical training. Buyers browsing listings around Perth are working from photographs and a seller's description, both of which are designed to sell.

Here's what to look for before that becomes your problem.

Cold Starts Reveal What Warm Engines Hide

This is the single most useful thing you can insist on, and sellers occasionally resist it. A warm engine masks rough idling, difficult starting, and the blue smoke that indicates oil burning, all of which settle down and disappear once the engine has had time to reach normal operating temperature.

Arrange to see the car before it's been driven, and put your hand on the bonnet when you arrive to confirm it's cold. Watch the exhaust on start-up: blue suggests oil, white that persists suggests coolant, and black indicates fuel mixture problems. A seller who has warmed the car up before you arrive may simply be being considerate, and it's also worth noting.

Fluids Tell You How the Car Was Treated

Opening the bonnet and checking three things takes two minutes and is genuinely revealing. Engine oil should be brown or black and smooth between your fingers rather than gritty, and a milky or foamy appearance can indicate a more serious issue like coolant mixing into the oil.

Coolant that looks rusty or has an oily film suggests problems worth investigating. Transmission fluid that smells burnt or appears dark rather than reddish points toward wear that's expensive to correct. A car with pristine fluid throughout is either well maintained or was serviced last week specifically for sale, which is why fluid condition works best alongside service history rather than instead of it.

Recall Status Is Public and Free to Check

This check costs nothing, and most private buyers never do it. The Australian Government's Vehicle Recalls website lets you search recall notices for Australian road vehicles and approved components, and manufacturers are required to publish notices there.

Outstanding recalls matter more on used cars than new ones, since notification letters go to registered addresses and cars change hands. An unrepaired recall isn't necessarily a reason to walk away, as the repair is free at a dealer, but it tells you something about how attentively the vehicle has been maintained and gives you something to raise before agreeing to a price.

Panel Gaps and Paint Reveal Past Repairs

Accident repair isn't automatically a problem, and undisclosed accident repair frequently is. Uneven gaps between panels, doors that don't close consistently, and paint that differs slightly in shade or texture between panels all suggest work that wasn't mentioned. People browsing cars for sale perth should walk the car in daylight and crouch at each corner to sight along the panels, since imperfections are considerably easier to see at an angle than head-on.

Dealers including Carmart Perth list vehicle documentation alongside listings, which is worth reviewing since a repair recorded in the history is a different proposition from one you discovered yourself at inspection.

Tyres and Brakes Indicate Alignment and Suspension

Tyre wear is a diagnostic surface most buyers glance at and don't read. Wear concentrated on the inner or outer edge indicates alignment problems, while patchy or cupped wear suggests worn suspension components.

Check all four and compare them. Four mismatched brands suggest replacement as needed rather than in pairs, which points to a cost-minimizing owner. Brake discs with a pronounced lip at the outer edge are near replacement, and that's a known expense rather than a hidden one, which makes it useful for negotiation.

Electronics Fail Quietly and Cost Disproportionately

Modern vehicles carry electronic systems that are expensive to diagnose and repair, and problems here rarely announce themselves during a short drive. Working through every control systematically takes five minutes:

• Warning lights: confirm they all illuminate at ignition and then extinguish, since a removed bulb hides a fault

• Windows, mirrors, and locks: operate every one rather than sampling

• Climate control: test both heating and cooling regardless of the season

• Infotainment and cameras: confirm screens, reversing cameras, and sensors all respond

Any of these failing is a repair cost, and several failing together suggests a wiring or module problem that's considerably worse than the sum of its parts.

The Bottom Line

None of these checks require expertise, and together they take about twenty minutes, which is a poor trade against the cost of discovering the same problems afterward. Insist on a cold start even if it's inconvenient to arrange. Read the fluids, run the recall search, sight along the panels in daylight, and work through every electrical control rather than assuming.

What none of this replaces is an independent inspection by a qualified mechanic before money changes hands, since the problems that cost most are frequently the ones nobody can see from outside the car. Treat your own checks as the filter and the inspection as the decision.

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