When you’re about to invest thousands of dollars in a used car, you want to know exactly what you’re getting. But what separates a thorough professional inspection from a quick once-over? The answer lies in a comprehensive, systematic approach that leaves no component unchecked.
At GPS Vehicle Inspections, our qualified mechanics follow a detailed 150+ point inspection checklist developed over years of identifying both obvious problems and hidden issues that could cost buyers thousands down the track. This guide breaks down exactly what we check, why each point matters, and what you should look for if you’re evaluating a vehicle yourself.
Why 150+ Inspection Points Matter
The Difference Between Good and Great Inspections
A basic inspection might check 20-30 major components. But cars are complex machines with hundreds of interconnected systems, and problems often hide in the details. Our comprehensive approach checks:
- 50+ Exterior Points - Body, paint, glass, lights, tyres
- 40+ Mechanical Points - Engine, transmission, suspension, brakes
- 30+ Underbody Points - Frame, exhaust, fuel system, corrosion
- 25+ Interior Points - Seats, electronics, controls, safety features
- 20+ Electrical Points - Battery, alternator, diagnostics, warning lights
Exterior Inspection Points (50+ Checks)
Body Panels and Paint (15 Points)
Panel Alignment and Gaps :
- Bonnet alignment and even gaps both sides
- Front doors alignment to guards and sills
- Rear doors alignment (sedans/SUVs)
- Boot/tailgate alignment and operation
- Panel gaps consistent around entire vehicle
Paint Condition Assessment :
- Overall paint condition and gloss
- Color matching across all panels
- Fading or oxidation (especially on roof and bonnet)
- Clear coat condition and peeling
- Touch-up paint or repairs visible
- Overspray on trim, glass, or rubber seals
- Orange peel texture (indicates respray)
Structural Integrity :
- Signs of welding or panel replacement
- Mismatched panel fasteners or clips
- Body filler detection (magnet test)
Why These Matter: Misaligned panels and paint inconsistencies often indicate previous accident damage that may have compromised the vehicle’s structural integrity and safety.
Glass and Seals (8 Points)
- Windscreen chips, cracks, or stars (location critical)
- Windscreen delamination or haziness
- All side window condition
- Rear windscreen condition and defroster operation
- Sunroof operation and seal condition (if equipped)
- Weatherstripping condition (doors, windows, boot)
- Window operation (power windows all positions)
- Door seal integrity and condition
Critical Check : Any windscreen damage in the driver’s view area is a registration failure in most states.
Lights and Lenses (10 Points)
Structural Integrity :
- Headlight operation (low and high beam)
- Headlight lens clarity (not yellowed/hazy)
- Indicator operation (front, side, rear)
- Brake light function (including high-mount)
- Reverse light operation
- Fog light function (if equipped)
- Daytime running lights (if equipped)
- License plate light function
- Headlight alignment (basic check)
- No moisture inside any light housings
Why These Matter: Beyond safety, failed lights mean immediate repair costs and registration delays.
Wheels and Tyres (12 Points)
- Front left tyre tread depth (minimum 1.5mm legal)
- Front right tyre tread depth
- Rear left tyre tread depth
- Rear right tyre tread depth
- Spare tyre condition and inflation
- Tyre brand matching (mismatched = budget replacements)
- Uneven wear patterns (alignment/suspension issues)
- Tyre age (DOT code - avoid tyres over 6 years)
- Wheel rim condition (no cracks, significant damage)
- Wheel bearing noise (during test drive)
- Tyre pressure (properly inflated for inspection)
- Jack and tyre change tools present
Red Flag: Uneven tyre wear on one side indicates suspension or alignment problems costing $500-$2,000 to fix.
Mirrors and External Accessories (5 Points)
- Side mirror condition and adjustment
- Side mirror indicator operation
- Heated mirror function (if equipped)
- Rear view mirror condition
- Roof rack condition and attachment (if equipped)
Underbody and Mechanical Structure (30+ Points)
Frame and Structural Components (10 Points)
- Front frame rails straightness (no bends or damage)
- Rear frame rails condition
- Cross members condition and integrity
- Floor pan condition (no buckles, holes, or damage)
- Suspension mounting points integrity
- No signs of major structural repairs
- Crumple zone condition (not previously activated)
- A-pillar, B-pillar, C-pillar condition
- Roof structure integrity
- Overall rust or corrosion assessment
Critical: Any frame damage can affect safety and vehicle value significantly. Our mobile car inspection service includes thorough underbody assessment that most buyers can’t perform themselves.
Exhaust System (5 Points)
- Exhaust manifold condition and leaks
- Catalytic converter present and condition
- Muffler condition and mounting
- Exhaust hangers and supports secure
- No excessive rust or holes
Cost Implications: Exhaust repairs: $200-$1,500 depending on what needs replacement.
Fuel System (4 Points)
- Fuel tank condition (no rust or damage)
- Fuel lines condition (no leaks or corrosion)
- Fuel filter condition (if externally accessible)
- No fuel odor indicating leaks
Driveline Components (6 Points)
- CV joint boots condition (no tears or grease leaks)
- Drive shaft condition and balance
- Differential condition and leaks (RWD/AWD)
- Transfer case condition (4WD/AWD)
- Universal joints (if applicable)
- No unusual driveline noises or vibrations
Cooling System Inspection (5 Points)
- Radiator condition (no leaks or damage)
- Radiator hoses condition (not cracked or bulging)
- Coolant overflow tank level and condition
- Water pump condition (no leaks)
- No signs of overheating (stains, corrosion)
Engine Bay Inspection (25+ Points)
Engine Condition Assessment (10 Points)
- Engine oil level and condition
- Oil leaks from gaskets or seals (valve cover, pan, rear main)
- Engine mount condition
- Timing belt/chain condition (if visible)
- Belt and pulley condition (serpentine, alternator)
- Engine bay cleanliness (excessive degreasing = leak hiding)
- Visible wiring condition
- Engine cover condition and fitment
- Cold start behavior (smooth idle, no smoke)
- Warm idle quality and smoothness
Why Check Cold Start: Many issues only appear during cold starts—valve noise, smoke, rough running.
Fluid Analysis (8 Points)
- Engine oil color and contamination
- Coolant color and condition (no rust or oil)
- Brake fluid level and color (should be clear/light amber)
- Power steering fluid level and condition
- Transmission fluid level and color (if dipstick accessible)
- Windscreen washer fluid level
- Clutch fluid level (manual transmission)
- No mixing of fluids indicating head gasket issues
Critical Check : Milky oil = head gasket failure ($2,000-$4,000 repair). Burnt transmission fluid = imminent failure ($3,000-$8,000).
Battery and Charging System (4 Points)
- Battery age and condition
- Battery terminal corrosion
- Battery hold-down secure
- Charging system voltage (13.5-14.5V running)
Engine Performance (3 Points)
- Acceleration smoothness (no hesitation)
- No unusual noises (knocking, ticking, grinding)
- No excessive smoke (blue = oil, white = coolant, black = fuel)
Transmission and Drivetrain (12 Points)
- Transmission fluid condition (if accessible)
- Transmission pan condition (no leaks)
- Gear engagement smoothness (all gears)
- No slipping or delayed shifting
- Clutch operation smooth (manual)
- Clutch take-up point (not worn if near top)
- Transfer case operation (4WD/AWD)
- All-wheel drive system functioning
- No transmission whining or grinding
- Proper shift patterns and timing
- No juddering or shuddering
- Reverse gear engages properly
Why This Matters : Transmission problems are among the costliest repairs—$3,000-$10,000 for replacement. Read our guide on common used car issues to learn which models have transmission problems.
Suspension and Steering (15 Points)
- Front shock absorbers (no leaks or excessive bounce)
- Rear shock absorbers condition
- Front springs condition (no sagging or breaks)
- Rear springs condition
- Front control arm bushings
- Rear suspension bushings
- Ball joint condition and play
- Tie rod end condition
- Steering rack condition (no leaks)
- Power steering pump operation
- Steering wheel centering
- No steering wheel vibration at speed
- Steering response (not loose or tight)
- Alignment apparent (drives straight)
- No unusual suspension noises over bumps
Test Method: Bounce test each corner—should settle within 1-2 bounces.
Braking System (10 Points)
- Brake pedal feel (firm, not spongy)
- Brake pad thickness (front)
- Brake pad thickness (rear)
- Brake rotor condition (not excessively grooved)
- Brake caliper condition
- Brake hoses condition (not cracked)
- Brake fluid level and color
- Handbrake operation and holding power
- No brake pull to one side
- ABS operation (if equipped)
Safety Critical : Brakes below 3mm need immediate replacement ($400-$1,200).
Interior Condition (25+ Points)
Seats and Upholstery (6 Points)
- Driver seat condition (wear, tears, stains)
- Front passenger seat condition
- Rear seat condition
- Seat adjustment mechanisms function
- Headrest adjustment and condition
- Seatbelt condition (all positions)
Dashboard and Controls (12 Points)
- Dashboard condition (no cracks)
- All switches and buttons function
- Air conditioning cooling performance
- Heating system operation
- Climate control functionality (if equipped)
- Window switches (all positions)
- Mirror adjustment controls
- Central locking operation
- Audio system function
- Navigation system (if equipped)
- Instrument cluster clarity (no dead pixels)
- Odometer reading verification (legitimate)
Safety Features (7 Points)
- Airbag warning light proper operation (on then off)
- ABS warning light proper operation
- Seatbelt reminder function
- Child seat anchor points present and undamaged (ISOFIX)
- Top tether anchors condition
- Rear parking sensors function (if equipped)
- Reversing camera operation (if equipped)
For family car buyers, these safety features are critical—see our comprehensive guide on family car safety features.
Electrical and Electronic Systems (20+ Points)
Warning Lights and Diagnostics (8 Points)
- No warning lights after startup (except momentary self-test)
- Check engine light not illuminated
- ABS light not permanently on
- Airbag light not permanently on
- Transmission warning (if equipped) not on
- Traction control light operates correctly
- Electronic stability control functional
- Tire pressure monitoring system (TPMS) functional
Computer Diagnostic Scan (5 Points)
- No current fault codes stored
- No pending fault codes
- Emission system readiness complete
- ABS system no faults
- Airbag system no faults
Critical: Even with no warning lights, stored codes can indicate intermittent issues or recently cleared faults.
Electronic Features (7 Points)
- Power windows all positions
- Sunroof operation (if equipped)
- Keyless entry function (if equipped)
- Alarm system operation
- Automatic headlights function (if equipped)
- Rain-sensing wipers (if equipped)
- Lane departure warning (if equipped)
Documentation and History (10 Points)
- Service book present and stamped
- Service history matches odometer
- Owner's manual present
- Spare key available
- Registration current
- PPSR check clear (no finance, not stolen, not written off)
- Recall check completed (all recalls done)
- Insurance claim history (if available)
- Number of previous owners reasonable
- Consistent state registration history
Why Documentation Matters: Good service history adds value and confidence. For more on this, read our article about what makes a good vehicle inspection report.
Test Drive Assessment (15+ Points)
Engine Performance Under Load (5 Points)
- Smooth acceleration through all RPM ranges
- No power loss or hesitation
- Engine doesn't overheat during drive
- Oil pressure stable (if gauge equipped)
- No unusual engine noises under load
Transmission Performance (4 Points)
- All gears engage smoothly
- No slipping between gears
- Shift timing appropriate
- Kickdown function works (automatic)
Handling and Ride (6 Points)
- Vehicle tracks straight (no pulling)
- Steering responsive and appropriate weight
- No vibrations through steering wheel
- Ride quality appropriate for vehicle type
- No unusual suspension noises
- Cornering feels stable and controlled
Advanced Checks for Specific Concerns
- Transmission fluid analysis
- Extended test drive (minimum 30 minutes)
- Smoke test under hard acceleration
- Thorough engine diagnostic scan
For Luxury or European Vehicles
- Electronic system comprehensive scan
- Air suspension operation (if equipped)
- Premium audio system functionality
- Complex electronic features tested
For 4WD/Off-Road Vehicles
- 4WD engagement and disengagement
- Differential locks operation
- Underbody bash plate condition
- Signs of off-road use/damage
The GPS Vehicle Inspections Advantage
Our Comprehensive Process
When you book our pre-purchase vehicle inspection service, our qualified mechanics conduct all 150+ checks systematically, using :
Professional Equipment :
- Diagnostic scan tools (OBD-II)
- Paint thickness gauges (detects body filler)
- Brake measuring tools
- Professional diagnostic scan tools
- Under-vehicle inspection cameras
Detailed Documentation :
- Photos of every concern identified
- Severity ratings (Minor, Moderate, Major, Critical)
- Priority recommendations
- Immediate phone consultation after inspection
- Comprehensive written report within 24 hours
Expert Analysis :
- Pattern recognition from thousands of inspections
- Model-specific problem knowledge
- PPSR and vehicle history check included (valued at $37)
- Detailed phone consultation to discuss findings
What Your Report Includes
After completing all 150+ inspection points, you receive
- Executive Summary - Overall condition rating
- Section-by-Section Analysis - Detailed findings for each system
- Photo Documentation - Visual evidence of all concerns
- Safety Assessment - Any safety concerns highlighted
- PPSR & Vehicle History Check - Included free (valued at $37)
- Priority Recommendations - What needs immediate attention
- Immediate Phone Consultation - Discuss findings directly with your mechanic
For more details on understanding your inspection report, visit our guide on how to read vehicle inspection reports.
DIY Pre-Purchase Checks vs. Professional Inspection
What You Can Check Yourself:
- Overall appearance and cleanliness
- Obvious body damage or panel misalignment
- Tyre condition and tread depth
- Fluid levels (oil, coolant, brake fluid)
- Interior condition and features
- Test drive impressions
What Requires Professional Equipment :
- Computer diagnostic scanning
- Underbody structural inspection
- Brake pad thickness measurement
- Paint thickness testing
- Compression testing
- Hidden leaks and issues
Reality Check: Most buyers spot 20-30% of issues a professional finds. The remaining 70% includes the expensive problems that cost thousands to repair.
Common Inspection Findings and Their Costs
Minor Issues (Under $500)
- Worn wiper blades: $30-80
- Cabin air filter replacement: $40-100
- Battery replacement: $150-300
- Minor exterior trim damage: $100-400
Moderate Issues ($500-$2,000)
- Brake pad and rotor replacement: $400-1,200
- Shock absorber replacement (pair): $600-1,500
- Minor oil leaks (gaskets): $300-800
- Tyre replacement (set): $600-1,200
Major Issues ($2,000-$5,000)
- Timing belt service: $800-1,800
- Clutch replacement: $1,500-3,000
- Suspension overhaul: $1,500-3,500
- Air conditioning compressor: $1,200-2,500
Critical Issues (Over $5,000)
- Transmission replacement: $3,000-10,000
- Engine rebuild: $5,000-15,000
- Structural accident damage repair: $3,000-20,000
How Inspection Findings Affect Your Purchase Decision
Scenario 1: Clean Bill of Health
Findings : Minor items only
Action : Proceed with purchase confidently
Negotiation : Perhaps minor reduction for identified items
Action : Proceed with purchase confidently
Negotiation : Perhaps minor reduction for identified items
Scenario 2: Moderate Issues
Findings : Several moderate issues identified
Action : Negotiate price reduction or request seller repairs
Negotiation : Use inspection findings as leverage
Action : Negotiate price reduction or request seller repairs
Negotiation : Use inspection findings as leverage
Scenario 3: Major Problems
Findings : Significant mechanical or safety issues
Action : Walk away unless price reduced significantly
Negotiation : May not be worth the risk
Action : Walk away unless price reduced significantly
Negotiation : May not be worth the risk
Scenario 4: Critical Safety Issues
Findings : Structural damage, major safety concerns
Action : Walk away immediately
No negotiation : Your safety is priceless
Action : Walk away immediately
No negotiation : Your safety is priceless
When to Schedule Your Inspection
Optimal Timing
- After test drive - Once you're seriously interested
- Before making offer - Or make offer conditional on inspection
- Weekday preferred - Better scheduling availability
- Allow 2-3 days - For thorough inspection and report
What to Tell the Seller
“I’m very interested in the vehicle and would like to arrange a pre-purchase inspection before finalizing the purchase. This is standard practice and ensures we’re both confident in the transaction.”
Most honest sellers welcome inspections—it actually facilitates the sale by giving buyers confidence.
Booking Your Comprehensive Inspection
Contact us today or book your inspection online
We operate 7 days a week across Sydney and Melbourne.
Don’t leave your used car purchase to chance. Our systematic 150+ point inspection process has helped thousands of Sydney buyers :
- Avoid expensive mistakes - Identify hidden problems before purchase
- Negotiate with confidence - Use detailed findings as leverage
- Buy with confidence - Know exactly what you're getting
- Plan ahead - Understand upcoming maintenance needs
Our Service Includes :
- Mobile inspection at any location in Sydney and Melbourne
- Qualified, experienced mechanics
- 150+ point comprehensive checklist
- Detailed phone consultation after inspection
- Comprehensive photo report within 24 hours
- Free PPSR & vehicle history check (valued at $37)
Investment vs. Risk :
- Inspection cost: $200-400
- Potential savings: Thousands in avoided repairs
- Peace of mind: Priceless
Contact us today or book your inspection online
We operate 7 days a week across Sydney and Melbourne.
Ready to book your comprehensive pre-purchase inspection? Contact GPS Vehicle Inspections today and let our experts examine every one of these 150+ critical points before you commit to your purchase.
Don’t gamble with your money—invest in professional inspection and drive away confident.
*GPS Vehicle Inspections brings professional-grade inspection standards to every pre-purchase assessment. Our 150+ point checklist has been refined through thousands of inspections, helping buyers in Sydney, Melbourne and beyond make informed decisions and avoid costly surprises.*
