Used Car Inspection Checklist Australia — 50+ Things to Check Before You Buy
A thorough inspection is the difference between buying a reliable car and inheriting someone else's costly problem. Walk through our 50-point checklist covering the quick spot check, exterior, interior, engine bay, test drive, and documentation — before you hand over a single dollar.
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12-minute read
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Covers all states & territories
Start with a PPSR check — $2 at ppsr.gov.au reveals outstanding finance, stolen status, and write-off history before you waste time on an inspection.
Do a full 5-minute walk-around first — panel gaps, rust, tyres, and a smell test will tell you whether the car is worth proceeding with before you pop the bonnet.
Never skip the test drive — many mechanical faults only appear under load: transmission slipping, steering pull, brake shudder, and suspension knocks all reveal themselves when driving.
Engine oil condition is a fast health indicator — milky oil means water contamination (head gasket), black sludge means grossly overdue services. Both are expensive problems.
For any car over $8,000, book an independent pre-purchase inspection — a mobile mechanic charges $150–$300 and can identify issues a layperson will miss entirely.
A seller who refuses an independent inspection is a red flag — any legitimate seller with nothing to hide will welcome a professional check.
Buying a used car is one of the largest purchases most Australians make outside of property. Yet many buyers spend just 15 minutes looking at a vehicle before handing over thousands of dollars. This checklist gives you a systematic 45-minute inspection framework that covers every area of the vehicle — the same approach a professional inspector would take, structured so you can do it yourself.
Work through each section in order. Complete the quick spot check first to decide whether the car is worth a deeper look before investing your full time. If the car passes all six stages, you can proceed with confidence. If it fails at any stage, use the findings to negotiate a lower price — or walk away entirely.
Back to our complete car buying guide if you want the full picture from budget-setting through to registration transfer.
1. Quick 5-Minute Spot Check (7 Items)
Before spending 45 minutes on a detailed inspection, do this rapid walk-around first. These seven checks take about five minutes and will tell you immediately whether the car is worth examining more closely. If the car fails two or more of these spot checks, seriously consider whether it is worth proceeding at all.
Before you touch the car, stand back 10 metres and look at it as a whole. Does the overall condition match what was described in the advertisement? Pay attention to whether the colour looks consistent in natural light versus photos, whether the car sits level (sagging on one side suggests suspension issues), and whether there are any immediately obvious dents, accident damage, or repairs not mentioned in the listing.
A listing that says "great condition" but shows obvious crash damage or fading paint is a seller who is either dishonest or out of touch with their car's actual value — neither is a good start.
Car matches photos in the advertisement
Colour consistent under natural daylight
Car sits level — not sagging on one side
No immediately obvious damage not mentioned in listing
Walk slowly around the entire car at a low angle, crouching to look along each panel. Looking along the body at a low angle in bright light reveals dents, ripples, and filler that are completely invisible when looking straight at the car. Run your hand along the doors and bonnet — you will feel any filler, which has a slightly waxy texture compared to metal.
Walk full circuit at low angle looking along each panel
No dents, ripples, or collision damage
Run hand along panels — no waxy filler texture
No deep scratches that expose bare metal (rust risk)
Tyres are expensive ($150–$400 per tyre for most vehicles) and their wear pattern reveals the history of the car's alignment and mechanical condition. The legal minimum tread depth in Australia is 1.5mm — use a 20-cent coin; if the platypus's bill disappears below the tread, there is adequate depth remaining.
All four tyres have at least 3mm tread remaining (budget replacement if under 3mm)
Even wear across the full tread width — inner or outer edge wear indicates alignment issues
Matching brand and size on each axle (mismatched tyres = previous owner cutting corners)
No cracking, bulges, or sidewall damage
Check the spare tyre in the boot — it should also be serviceable
Get down and look under the car with a torch. You are looking for any signs of fresh fluid on the ground beneath the engine and gearbox areas, surface rust on the underside (some surface rust on older cars is normal; heavy rust on structural components is a serious concern), and the condition of the exhaust system.
No fresh oil or fluid stains on the ground or underside
Exhaust — no holes, rust-through, or hanging components
Chassis rails — no heavy rust or evidence of repair welds
No mud or silt packed in cavities (flood damage indicator)
Open all four doors and the boot. Check how easily they open and whether they hold their position when opened — sagging doors indicate worn hinges which cost several hundred dollars per door to replace. Look at the gaps between the door and the door frame; they should be even all the way around. Uneven gaps are a sign of previous accident damage and panel repair.
All doors open and close smoothly without lifting or dropping
Doors hold their position when opened (no sag)
Door gaps consistent and even all around the frame
Boot opens, closes, and latches properly
Before looking at anything inside the cabin, simply sit down and smell. Your nose is an effective diagnostic tool. A musty, mildew smell that air fresheners cannot fully mask is a strong indicator of water ingress — a major issue that causes ongoing mould and electrical problems that are difficult and expensive to fix. A burning smell can indicate oil leaks dripping on hot exhaust components, an overheating issue, or worn brakes and clutch.
No musty or mildew smell (water damage indicator)
No burning smell (oil leak or mechanical issue)
No cigarette smoke odour embedded in upholstery (very difficult to remove)
Be suspicious of overpowering air fresheners masking an underlying smell
Turn the key or press the start button to the ignition ON position without starting the engine. The instrument cluster should light up with several warning lights for a few seconds during the self-check sequence — this confirms all warning light bulbs are working. When the engine starts, all warning lights should extinguish within a few seconds. Any warning light that stays on after the engine is running indicates a fault. Ask the seller to explain any persistent warning lights before proceeding.
Multiple warning lights illuminate during key-on self-check (confirms lights work)
Engine warning light (check engine / MIL) extinguishes after startup
Airbag / SRS warning light extinguishes
ABS warning light extinguishes
Battery / charging light extinguishes
Oil pressure light extinguishes immediately on startup
2. Exterior Inspection (15 Items)
The exterior inspection goes deeper than the quick walk-around. You are specifically looking for evidence of previous accident damage, rust that has been painted over, and signs of shoddy repair work. A professional resprayer can make a damaged car look almost new — your job is to find the signs that betray the repair.
Stand at the corner of the car and look along the body panels in bright, natural light. Factory paint should have a consistent depth and sheen across all panels. A resprayed panel will often show slightly different colour tone (especially noticeable on older cars whose original paint has faded), a different level of gloss, or "orange peel" — a textured surface that looks like the skin of an orange. Paint that is noticeably thicker or has overspray on rubber seals, plastics, or window edges is a sign of panel repair.
Colour tone consistent across all panels in natural light
Same gloss level on all exterior surfaces
No orange peel texture on individual panels only
No overspray on rubber seals, plastic trim, or glass edges
Check door jambs — if different colour to exterior, door was resprayed
Factory panel gaps are set to precise tolerances — usually around 4–6mm and consistent all the way around each opening. Uneven panel gaps are one of the clearest indicators of previous accident damage and structural repair. After a collision, even a well-executed repair often struggles to restore the exact factory gap tolerances.
Front door gaps even top-to-bottom and across the full edge
Rear door gaps match the front doors in width and consistency
Bonnet gaps even along both sides and across the front
Boot/tailgate gaps consistent all the way around
Front and rear bumper to body gaps consistent
Rust is the silent killer of older cars. Once it gets into structural metal it is expensive and sometimes impossible to fix economically. Australia's coastal areas, tropical humidity in QLD and NT, and road salt from alpine areas all accelerate rust. The worst areas to check are the places water collects and sits: wheel arches, the bottom of sill panels (the trim running under the doors), and the boot floor under the carpet.
Sill panels (under doors) — press to check for rust bubbling
Under each door — the very bottom seam where water collects
Boot floor — lift carpet to inspect steel floor
Check where rear seat meets the floor (water entry point)
Look up inside wheel arches with a torch — surface rust vs through rust
Windscreen replacement in Australia costs $400–$1,500 depending on the vehicle. A chip in the driver's line of sight is a fail on a roadworthy inspection. Small chips outside the driver's zone can often be resin-injected for $80–$150. Any crack that spans more than 150mm or runs through the driver's primary vision area requires full windscreen replacement.
Windscreen — no cracks, no chips in driver's primary vision zone
All side windows — no cracks, chips, or scratches in vision areas
Rear window — no cracks; check heated element wires intact
Sunroof glass (if fitted) — no cracks, seals intact, opens and closes fully
Have a helper stand outside while you cycle through all lighting functions from the driver's seat. Lens cracks allow moisture inside, causing condensation that is difficult to clear and will cause the unit to fail roadworthy inspection. Moisture inside headlight lenses on a sunny day appears as fogging or water droplets inside the lens.
Low beam headlights both working and aligned
High beam headlights both working
Front indicators — both sides, correct flash rate
Rear tail lights both working
Brake lights — all three (including third brake light if fitted)
Rear indicators both working
Reverse lights both working (put car in reverse briefly)
No moisture or fogging inside any lens housing
No cracked or broken lens covers
These smaller checks fill in the complete exterior picture. Deteriorated weatherstripping causes wind noise and water leaks — a minor but annoying and ongoing issue. Missing badges are sometimes a sign that filler was used under the area where a badge was bonded (the filler prevents re-adhering the badge). Number plates must match registration papers exactly.
Rubber seals around all doors — pliable, not cracked or torn
Rubber seals around all windows and the boot
Front and rear bumpers — no cracks, no misalignment, no missing clips
Both side mirrors — no cracks, electric adjustment works on both
All factory badges/emblems present (missing badges may hide filler/bodywork)
Number plates present on both front and rear, match rego papers
The interior tells you a lot about how a car has been lived in and cared for. A worn driver's seat bolster on a car with claimed low kilometres is a major inconsistency. Water damage shows up in subtle ways — staining under floor mats, a musty smell that returns in damp weather, and rust on the floor pan metal under the carpet. Take your time working through these checks systematically.
The driver's seat bolster (the inner edge you push against when getting in and out) wears proportionally to how many times someone has entered and exited the car. A severely worn bolster on a car with only 50,000km is a clear sign the odometer doesn't tell the full story. Check all seat adjustment mechanisms — electric seat adjusters are expensive to repair if they fail.
Driver's seat bolster wear consistent with claimed kilometres
No tears, burns, or major stains in driver or passenger seats
All seat adjustment mechanisms work (fore/aft, height, recline)
Electric seat adjusters (if fitted) work in all directions
Rear seats — no tears, no staining, fold mechanism works
Headrests present and height-adjustable on all positions
Dashboard cracks and fading are common on older cars parked in Australian sun and indicate age and UV exposure. More importantly, the instrument cluster should show all warning lights illuminating correctly on the key-on cycle and clearing after startup. A warning light that has been taped over or has the bulb removed is a very serious red flag — someone has deliberately hidden a fault.
Dashboard — no major cracks, fading appropriate to vehicle age
All warning lights illuminate on key-on self-check
No warning lights remaining on after engine startup
Odometer reading — consistent with service history and wear patterns
Fuel gauge works and moves appropriately
Temperature gauge rises to normal operating range within 5–10 minutes
Test each power window from both the individual door switch and from the driver's master switch panel. Window regulator failure is a common and moderately expensive repair ($200–$600 per window). A window that moves slowly or makes a grinding noise is a regulator that is on its way out.
Driver's window — up and down from door switch and master switch
Front passenger window — up and down from door switch and master switch
Rear left window — from door switch and master switch
Rear right window — from door switch and master switch
All windows move smoothly with no grinding or hesitation
Child lock function works if applicable
Air conditioning regas costs $150–$250 and is a routine service item — but if the system doesn't produce cold air at all, there may be a more expensive leak or compressor issue. The air conditioning compressor is one of the more expensive repairs on a car ($800–$2,500+ fitted). Infotainment system replacement is often $500–$2,000 for manufacturer-specific units.
Central locking — all 4 doors lock from key fob and driver's button
Air conditioning — cold air within 30 seconds on maximum setting
A/C — no unusual smells or noises from the blower
Heater — produces hot air on maximum setting
All blower fan speeds work
Stereo/infotainment — powers on, radio works
Bluetooth pairing works (test with your phone)
USB/AUX inputs work
All speakers produce clear sound with no distortion
Lift every floor mat and feel the carpet beneath it. Water-damaged carpet feels damp even when the sun has been out for days — the padding underneath retains moisture long after the surface has dried. In severe cases you will see rust forming on the floor pan metal itself. Press gently on the floor and feel for spongy carpet (water saturation) or any high spots (rust bubbling underneath). The headliner is often the last thing buyers check but cigarette smoke and water damage show up clearly on the roof fabric.
Lift driver's floor mat — carpet dry, no water staining
Lift passenger floor mat — carpet dry, press to check for dampness
Lift rear floor mats — check for water staining or rust on floor pan
Glovebox interior — no water staining, opens and closes smoothly
Owner's manual present in glovebox (a sign the car's history is intact)
Headliner — no sagging, no water stains, no smoke discolouration
4. Under the Hood (10 Items)
The engine bay inspection is the most intimidating part for many buyers, but the most important fluid checks are straightforward once you know what to look for. You do not need to be a mechanic — you need to know what normal looks like versus what is alarming. The most diagnostic fluid is engine oil: its colour and consistency tells you everything about how the engine has been maintained.
Pull the dipstick out, wipe it clean with a rag, reinsert it fully, then pull it out again to read the level. The oil should sit between the MIN and MAX marks. The colour tells the story: golden amber is fresh; dark brown is older but fine; black and sludgy indicates chronically neglected servicing. The most alarming colour is milky or cream — this means coolant has mixed with the oil, almost always caused by a blown head gasket. This is a repair that costs $1,500–$4,000+ and is a reason to walk away unless the price reflects it.
Oil level between MIN and MAX on dipstick
Oil colour: golden = fresh, brown = normal, black sludge = neglected
No milky/creamy colour or froth (head gasket failure)
No metal particles visible on dipstick (serious internal wear)
Check underside of oil filler cap — milky deposits here is also head gasket warning
Do not open the radiator cap when the engine is hot — wait until the engine has cooled completely or you risk severe burns from pressurised steam. Check the coolant overflow reservoir instead — it has MIN/MAX markings on the translucent plastic. Coolant should be bright coloured (green, pink, blue, or orange depending on type) and transparent. Rust-coloured, oily, or milky coolant indicates contamination. Brown, murky coolant means the cooling system hasn't been serviced in a very long time.
Coolant level at or near MAX in overflow reservoir
Coolant colour bright — green, pink, blue, or orange (clear is fine too)
No rusty, oily, or milky appearance in coolant reservoir
No white crystalline deposits around radiator cap or hose connections (previous leaks)
These three fluids are quick visual checks. Brake fluid absorbs moisture over time and turns from clear/amber to dark brown when it is well overdue for replacement — this affects braking performance and indicates maintenance neglect. Power steering fluid that is dark and smells burnt suggests the pump is working excessively hard, often due to a leak elsewhere in the system. Not all automatics have an accessible transmission dipstick — many modern cars require workshop fluid checking.
Brake fluid reservoir — at or above MIN, clear to amber colour
No dark brown brake fluid (overdue service, moisture contamination)
Power steering reservoir — at correct level, not dark or burnt-smelling
No burnt smell from transmission fluid (gearbox wear indicator)
Car batteries have a manufacture date stamped on them (typically a letter for the month and a number for the year). Most batteries last 3–5 years in Australian conditions — older than 4 years is worth factoring into your negotiation. Serpentine/drive belts (the large flat belt driving alternator, power steering, and air conditioning) should be inspected for cracking and fraying; replacement costs $150–$400 fitted. Timing belts (not visible on all cars) have manufacturer-specified replacement intervals — missing this service can cause catastrophic engine failure.
Battery terminals clean — no white or blue corrosion buildup
Battery manufacture date — under 4 years old is ideal
Drive belt(s) — no cracks, no fraying, correct tension
All hoses — firm but pliable, no soft spots, cracks, or leaks at connections
Radiator — look through grille for bent fins, damage, or leaks
Ask about timing belt service history if applicable to the engine
A clean engine bay can be a positive sign of a well-maintained car — or it can be a sign that a seller has just steam-cleaned the engine to hide oil leaks before your inspection. If the engine bay is spotlessly clean but the rest of the car is tired and dusty, it warrants suspicion. Look for fresh oil residue that the cleaning didn't fully remove — around valve covers, the oil filter, rocker covers, and at the base of the engine.
Engine bay cleanliness consistent with overall car condition
No fresh oil residue on valve cover, oil filter, or engine base
No traces of oil mist on firewall or inner guards
No evidence of hasty cleaning around known leak points
5. Test Drive Checklist (8 Items)
Never skip the test drive, and never let the seller drive while you ride as a passenger. You need to be behind the wheel to feel what the car is doing. Ask for at least 20 minutes — enough to drive on suburban streets, reach a speed of at least 80–100km/h on an arterial road if possible, and return to suburban traffic. A seller who insists on being in the car with you is fine; a seller who won't allow a test drive at all is a deal-breaker.
Insist on starting the car from cold — if the seller has already warmed it up, some problems (especially oil pressure issues, cold-start misfires, and transmission rough engagement) will be masked. A healthy engine should start promptly with no more than two seconds of cranking. Watch the exhaust — a small puff of white vapour on a cold morning is normal condensation; sustained white smoke after warmup is coolant burning; blue smoke is burning engine oil; black smoke is a fuel mixture issue.
Engine starts promptly from cold — not extended cranking
Cold idle smooth, settles to normal idle speed within 30 seconds
No white smoke from exhaust after warmup (coolant burning = head gasket)
No blue smoke (burning oil = piston rings or valve seals)
No black smoke (fuel mixture / injector issues)
No dashboard warning lights appear after startup
Test braking on a clear straight road — apply firm pressure and the car should pull up straight without pulling to either side. Pulling to one side during braking indicates a sticking brake caliper or uneven brake pad wear. A pulsating pedal or steering wheel shimmer under heavy braking indicates warped brake rotors. The steering wheel should sit centred when driving straight on a level road — if you need to hold it at an angle to go straight, the alignment is out.
Acceleration smooth with no hesitation, no misfires
No vibration through the steering wheel under acceleration
Firm brake application — car pulls up straight, no pulling
No pulsating brake pedal or steering shimmer under braking (warped rotors)
No grinding or squealing during braking (worn pads)
Steering wheel centred when driving straight on flat road
No excessive steering play or vagueness around the centre
No vibration through steering wheel at speed (wheel balance or alignment issue)
Drive over a few speed bumps at low speed — the suspension should absorb the bump with a smooth thud, not a metallic clunk or a double-knock. A single controlled bounce is correct; if the car continues to bounce after the bump, the shock absorbers are worn out ($300–$600 per corner). Listen for clicking sounds when turning — constant velocity (CV) joint issues produce a distinct click-click-click noise on full lock turns, and CV joint replacement costs $300–$600 per side.
Suspension absorbs bumps smoothly — no metallic clunks
Car settles after bump — no continued bouncing (worn shocks)
No knocking or rattling from suspension over rough surfaces
Automatic gearbox — smooth shifts with no hesitation or lurching
Manual gearbox — clean engagement through all gears, no crunching
Clutch (manual) — bites at a sensible point, not slipping or grabbing
No clicking noise on full-lock turns (CV joint wear)
No whining, howling, or droning noise at highway speed (wheel bearing)
6. Documentation Check (5 Items)
Never complete a private vehicle purchase without checking every one of these documents. The paperwork stage is where fraud most commonly occurs — VIN mismatches, undisclosed finance, and odometer fraud are all detectable with thorough document checking. Allocate 15 minutes for this stage and take photos of every document.
The Vehicle Identification Number (VIN) must match across three locations: the registration certificate, the VIN plate on the dashboard (visible through the windscreen on the driver's side), and the compliance plate stamped on the firewall or door jamb. Any discrepancy across these three is an immediate deal-breaker. Confirm the seller's identity on their driver's licence matches the name on the registration certificate.
VIN on registration certificate matches dashboard VIN plate
VIN on registration certificate matches compliance/firewall plate
Seller's driver's licence name matches name on registration certificate
Registration is current (not expired)
Vehicle description (make, model, colour) matches the physical car
No evidence of VIN plate tampering (re-riveted, altered numbers)
A full service history (FSH) is one of the most valuable things a used car can have. Stamped service books from a dealer or independent mechanic, with dates and odometer readings at each service, create a verifiable record. Cross-reference the odometer readings in the service book against the current odometer. If the book shows services every 10,000km but the kilometres don't stack up with the claimed total, the odometer may have been wound back. Odometer fraud is illegal in Australia but does occur.
Full service history present — stamped book or electronic records
Service intervals consistent with manufacturer's schedule (e.g. 10,000 or 15,000km)
Odometer readings in service records consistent with current reading
No suspicious gaps in service history (no records for several years)
Ask to contact the service shop for the most recent service — legitimate sellers won't object
In Victoria, a Roadworthy Certificate (RWC) is legally required from the seller for any used vehicle transfer — the seller must provide it, not the buyer. In Queensland, a Safety Certificate (formerly roadworthy) is required for all private sales. In NSW, SA, WA, TAS, NT, and ACT, requirements vary and a certificate is typically not required for private transfers (though the buyer accepts the vehicle as-is). Always confirm your state's current requirements with your state transport authority before completing the purchase.
Confirm your state's roadworthy requirements before inspection
VIC buyers: Roadworthy Certificate (RWC) from a licensed tester — must be current (valid for limited time)
QLD buyers: Safety Certificate from a licensed inspection station
Certificate matches the vehicle (VIN, make, model, plate)
Certificate issued recently — not many months old
The PPSR (Personal Property Securities Register) search at ppsr.gov.au is the single most important $2 you will spend before buying a used vehicle. It takes about two minutes: enter the VIN, pay by credit card, and receive an instant report. The report tells you three critical things: whether the vehicle has outstanding finance (a lender has a legal interest and the car could be repossessed), whether it has been reported stolen, and whether it has ever been written off by an insurer (even if cosmetically repaired).
Do not accept a seller's word that they have "already run the PPSR" — run it yourself on the spot or before attending the inspection.
Run your own PPSR search at ppsr.gov.au using the vehicle's VIN
No security interests (finance) registered against the vehicle
No stolen vehicle flag
No written-off vehicle status
VIN in report matches the car's physical VIN plates
The dashboard VIN plate (visible through the windscreen on the driver's side) and the compliance/firewall plate (riveted inside the engine bay or door jamb) are both factory-fitted identifiers. Any signs of tampering — re-drilled rivet holes, misaligned characters, unusual font, or VIN that doesn't match the build date/model year code — are serious red flags that could indicate a stolen vehicle or a "rebirthed" write-off. Purchasing a vehicle with a tampered VIN can result in the vehicle being seized, even if you are an innocent buyer.
Dashboard VIN plate — original factory rivets, no drilling or damage
VIN characters — consistent font and spacing throughout
Compliance plate — present, original rivets, readable
VIN year code consistent with vehicle's claimed build year
Both plates match each other and the registration certificate
When to Walk Away — Red Flags That Mean Do Not Buy
Not every used car issue is a dealbreaker — a worn tyre or a minor service overdue can simply be factored into your price negotiation. But there are certain situations where the correct decision is to walk away entirely, regardless of how much you like the car, how good the price seems, or how much pressure you feel from the seller.
These are the absolute deal-breakers:
Absolute Deal-Breakers — Walk Away
VIN doesn't match rego papers or physical plates — this is the clearest possible sign of a stolen or rebirthed vehicle. Purchasing this car exposes you to having it seized by police, leaving you with no car and no money.
PPSR shows an encumbrance (finance owing) — if you buy a car with registered finance against it, the lender can legally repossess it from you even though you paid the seller in good faith. This is one of the most common ways buyers lose money on private sales.
PPSR shows a written-off status — a statutory write-off has been assessed as too damaged to safely return to the road. A repairable write-off that has been re-registered is a legitimate category but requires disclosure — if the seller hasn't disclosed it and the PPSR reveals it, that is fraud.
Seller refuses to allow an independent pre-purchase inspection — there is only one reason a legitimate seller would refuse this: there is something wrong with the car they don't want discovered. A confident seller with a well-maintained vehicle welcomes a professional inspection.
No service history whatsoever on a high-kilometre car — a 200,000km car with no service records has no verifiable maintenance history. You have no way to know whether the timing belt has ever been changed, whether oil changes were done at all, or what's been neglected.
Visible structural or frame damage — crumpled or repaired chassis rails, kinking at the firewall, or evidence of major structural repair indicates the car has been in a serious collision. Even a professionally repaired structural car may never handle or crash-test as the manufacturer intended.
Odometer reading inconsistent with service records or wear — if the car has 80,000km on the clock but the service book shows services at 95,000km, 110,000km, and 125,000km, the odometer has been wound back. This is odometer fraud, which is illegal, but it still happens.
Signs of flood damage — mud or silt packed into cavity seams under the car, corroded electrical connectors, rust in unusual locations like behind the dashboard or inside door cavities, and musty smell that persists despite cleaning are all signs of flood damage. Flood-affected cars develop ongoing and often unpredictable electrical failures for years afterward.
Seller pressuring you to decide immediately — "I have three other people coming to look at it today" is a classic high-pressure tactic. Any seller who will not give you adequate time to inspect the car properly or consult with others should be viewed with strong suspicion.
Milky engine oil or coolant — this indicates head gasket failure or, in severe cases, a cracked block or head. These repairs cost $1,500–$5,000+ and often exceed the car's value. Unless the price is already adjusted to account for this, walk away.
Remember: if you walk away from a car because of red flags, you have not lost anything except your time. If you buy a car with a hidden major defect or undisclosed finance, you could lose thousands of dollars and be left with no vehicle at all. The next car is always just a few days away.
Frequently Asked Questions
Common questions about inspecting a used car before buying in Australia.
A professional pre-purchase inspection from a mobile mechanic in Australia typically costs between $150 and $300, depending on your location and the type of inspection. Most reputable services like NRMA Inspection & Buying, RACV Inspections, and independent mobile mechanics offer a comprehensive inspection that covers all mechanical systems, electronics, body condition, and a test drive. The inspector provides a written report with a condition rating and recommendations. For any vehicle over $8,000, this is the single best investment you can make — one identified issue can save you many times the inspection cost in repair bills or a stronger negotiating position. Many inspection services are mobile and come to wherever the car is located, making it straightforward to arrange.
Yes — you are absolutely entitled to bring an independent mechanic to any vehicle inspection, whether the car is at a private seller's home or on a dealer's lot. A private seller cannot legally prevent you from having an independent assessment, and any dealer who attempts to refuse should be viewed with the highest suspicion. In practice, dealers generally accommodate inspection requests because it reduces transaction disputes and builds buyer confidence. A seller who firmly refuses to allow an independent mechanic — for any reason — is one of the clearest red flags you will encounter. Whatever excuse they offer, the underlying reason almost certainly involves something they don't want professionally assessed.
The PPSR report is the single most important check, because it's the only one that reveals issues you literally cannot detect by looking at or driving the car. A vehicle can look and drive perfectly while still having $15,000 in outstanding finance registered against it — meaning a lender can legally repossess it from you after you've paid in full. The PPSR search at ppsr.gov.au costs approximately $2 and takes two minutes. It is non-negotiable for every used car purchase regardless of the price of the vehicle or how well you know the seller. After the PPSR, the mechanical priority is the engine oil condition — milky oil immediately tells you whether the car has a head gasket problem before you invest any further time.
Yes — every time, without exception. At approximately $2 per search on the official government website ppsr.gov.au, a PPSR check is the most cost-effective protection available when buying a used vehicle in Australia. The report reveals three critical pieces of information: whether there is registered finance (debt secured against the vehicle), whether the vehicle has been reported stolen, and whether it has ever been recorded as a written-off vehicle by an insurer. Do not rely on third-party car history services that charge more and often provide less accurate data than the official PPSR. Do not accept the seller's assurance that "it's all clear" — run the search yourself using the physical VIN number from the car's dashboard plate. The entire process takes about two minutes.
There are several ways to check for previous accident history. First, run a PPSR check — it will reveal if the vehicle has been written off by an insurer following a collision serious enough to have it declared a total loss. Second, do a physical inspection looking for telltale signs: paint overspray on rubber seals or plastics, mismatched panel gaps, panels that are a slightly different shade in natural light, waxy filler texture when you run your hand along the bodywork, and new paint inside the door jambs that doesn't match the exterior. Uneven boot gaps, misaligned bonnet, or a quarter panel that doesn't sit flush are all signs that a section of the car was replaced after a collision. Third, an independent pre-purchase inspector can use a paint depth gauge to identify which panels have more paint layers, revealing resprays even on a perfect-looking car. No method is 100% reliable alone — combining all three gives you the most complete picture.
On the test drive, focus on five main areas. First, the start: insist on a cold start — an engine that has been pre-warmed by the seller masks cold-start issues. Second, acceleration: smooth power delivery with no hesitation, misfires, or excessive exhaust smoke. Third, braking: firm pedal pressure pulling up straight with no pulling, grinding, squealing, or pulsating. Fourth, steering: centred when driving straight on a level road, no vibration at highway speed, and no clicking noise during full-lock turns. Fifth, suspension and noise: drive over a few speed bumps — one controlled thump is correct; metallic clunks, double-knocks, or continued bouncing indicate suspension problems. If possible, include some highway driving to check for wind noise, vibration, and whether the car tracks straight. Any new noise or sensation you notice is worth investigating before agreeing to buy.
State Resources — Roadworthy & Transfer Requirements
Vehicle transfer requirements — including whether a roadworthy or safety certificate is needed and what documentation the buyer and seller must provide — vary significantly across Australia's states and territories. For requirements specific to your state, contact your local transport authority: Service NSW (NSW), VicRoads (VIC), Queensland Transport/TMR (QLD), DoT WA (WA), SA.gov.au (SA), Transport Tasmania (TAS), NT.gov.au (NT), or Access Canberra (ACT). Always confirm current requirements before completing a purchase.
National Resources
PPSR.gov.au — Official Personal Property Securities Register for PPSR checks ($2 per search — see the Documentation section above for the direct link)
After your inspection, check the full costs of buying a car in your state — stamp duty, registration, and CTP vary significantly and can add thousands to your purchase.
Timing matters — see the best time to buy a car in Australia for the months and circumstances where buyers historically get the best prices.
For a complete walkthrough from setting a budget to signing the transfer papers, head back to our complete car buying guide for Australia.