Pre-Purchase Vehicle Inspection: What to Look For (Australia 2026)
A pre-purchase vehicle inspection is the most important step you can take before buying a used car. For $200–$350, a qualified mechanic gives you an honest assessment of the vehicle's mechanical condition, safety, and hidden problems the seller may not mention.
## What Does the Inspection Cover?
A thorough pre-purchase inspection typically assesses:
- **Engine** - compression, leaks, timing, belt condition, oil condition
- **Transmission** - gear changes, clutch wear, differential noise
- **Brakes** - pad thickness, disc condition, brake line integrity
- **Suspension** - shock absorbers, bushings, CV joints, wheel bearings
- **Body** - rust, panel alignment (signs of accident repair), paint condition
- **Electrical** - battery, alternator, lights, sensors, warning lights
- **Tyres** - tread depth, uneven wear (alignment issues), age
- **Underbody** - chassis rust, exhaust condition, fluid leaks
## Severity Ratings Explained
Most inspectors rate findings on a severity scale:
- **Minor** - Cosmetic issues or routine maintenance items. Budget under $500.
- **Moderate** - Needs attention within 6 months. Budget $500–$2,000.
- **Major** - Affects safety, value, or reliability. Budget $2,000–$10,000.
- **Critical** - Unsafe to drive or evidence of undisclosed damage. Walk away.
## Red Flags That Should Kill the Deal
**Mismatched odometer history** - If the PPSR check shows inconsistent odometer readings, the car may have been wound back. This is fraud.
**Evidence of major accident repair** - Misaligned panels, overspray on rubber seals, or mismatched paint suggest previous structural damage that may affect safety.
**Engine compression issues** - Low or uneven compression across cylinders points to worn piston rings, leaking valves, or head gasket failure. Repair costs: $1,500–$10,000.
**Transmission slipping** - Delayed or rough gear changes, especially in automatics, can signal impending transmission failure. Rebuilds cost $2,500–$6,000.
**Active rust on structural components** - Surface rust on panels is cosmetic. Rust on chassis rails, subframe, or suspension mounts is structural and expensive ($2,000–$8,000+ depending on extent).
## How to Use the Report
If the report reveals issues:
1. **Get repair quotes** - Use findings to get independent quotes from repairers.
2. **Negotiate the price** - Deduct repair costs from the asking price.
3. **Request the seller fix issues** - Before purchase, with proof of repair.
4. **Walk away** - Critical issues or too many moderate findings mean the car isn't worth the risk.
## PPSR Check: Don't Skip It
A Personal Property Securities Register (PPSR) check ($2–$4) reveals:
- Outstanding finance (if the car is used as security for a loan, the lender can repossess it - even from you)
- Stolen vehicle records
- Written-off vehicle history
- Registration and odometer history
## Let ReportWise Decode Your Inspection
Upload your pre-purchase vehicle inspection report to ReportWise and get a plain-English breakdown with severity ratings, repair cost estimates, and specific questions to ask the seller.