Ordering the wrong part is one of the most expensive mistakes you can make. The fix is dead simple: find your VIN, decode it, and use it to pull the exact part number. Takes five minutes, saves you hours of returns and arguments with sellers.
Where to Find Your VIN
Your VIN (Vehicle Identification Number) is a 17-character string of letters and numbers. Every car built after 1989 has one, and it's unique to your specific vehicle. Not just your model -- your actual car, with its specific engine, transmission, trim level, and build date.
Check these spots
- Driver's door jamb -- open the driver's door and look for a sticker or plate on the body where the door latches. This is the easiest spot on most Australian cars.
- Base of the windscreen -- stand outside the car and look at the bottom-left corner of the windscreen. The VIN is stamped on a small plate visible through the glass.
- Registration papers -- your rego certificate lists the VIN. Check your state's online rego lookup if you've lost the paperwork.
- Insurance documents -- your policy will have the VIN listed.
- Engine bay -- some manufacturers stamp the VIN on the firewall or inner guard. Common on older Fords and Holdens.
Write it down carefully. The letter O and the number 0 look similar. VINs never contain the letters I, O, or Q to avoid confusion.
How to Decode Your VIN
Each character in the VIN tells you something specific about your vehicle. Here's a real example using a common Australian car.
| Position | Characters | Meaning |
|---|---|---|
| 1 to 3 | 6T1 |
World Manufacturer ID -- 6T1 = Toyota, built in Australia |
| 4 to 8 | BF3FK |
Vehicle attributes -- model, body style, engine type, restraint system |
| 9 | 5 |
Check digit -- used to verify the VIN is legitimate |
| 10 | C |
Model year -- C = 2012 |
| 11 | X |
Assembly plant |
| 12 to 17 | 012345 |
Sequential production number |
Country codes you'll see in Australia
- 6 -- Australia (Holden, Toyota Australia)
- J -- Japan (Toyota, Mazda, Honda, Nissan, Subaru, Mitsubishi, Suzuki)
- K -- South Korea (Hyundai, Kia)
- W -- Germany (VW, BMW, Mercedes)
- 1, 4, 5 -- United States
- 2 -- Canada
- M -- Thailand (many Hilux, Ranger, and Triton models)
The model year code uses letters and numbers. A = 2010, B = 2011, all the way to Y (skipping I, O, Q, U, Z). Then it rolls to 1 = 2031, 2 = 2032, and so on. For the 2020s: L = 2020, M = 2021, N = 2022, P = 2023, R = 2024, S = 2025, T = 2026.
Using Your VIN to Look Up Parts
Dealer parts catalogues
Every dealer can punch your VIN into their parts system (usually Microcat, EPC, or a manufacturer-specific tool) and pull up every single part for your exact vehicle. Ring the parts department, give them your VIN and tell them what you need. They'll give you the OEM part number and a price.
You don't have to buy from them. Once you have that part number, you can search for it anywhere -- wreckers, eBay, aftermarket suppliers. The part number is the key that unlocks everything.
Online VIN lookup tools
- car-part.com.au -- Australian wrecker inventory search. Enter your VIN and the part you need, and it searches multiple wreckers at once.
- eBay compatibility checker -- when you list or search a part on eBay, the compatibility filter uses VIN data to confirm fitment.
- Manufacturer websites -- Toyota, Mazda, and Hyundai all have online parts catalogues where you can enter your VIN and browse the full parts diagram for your vehicle.
- PartsouQ, Amayama, Megazip -- Japanese parts catalogues with VIN lookup. Great for Toyota, Mazda, Nissan, and Honda.
Free VIN decoders
Sites like vindecoderz.com and the NHTSA VIN decoder will break down your VIN into plain English -- telling you the model, engine code, transmission type, trim level, and build date. This is useful when you're talking to wreckers who need to know your exact variant.
Cross-Referencing Between Models
This is where knowing part numbers saves you real money. Many manufacturers share parts across different models built on the same platform. If the part number matches, the part fits -- regardless of what badge is on the car.
Common Australian cross-references
- Toyota Camry and Aurion -- the Aurion is a rebadged Camry V6. Most body parts, interior trim, suspension components, and electrical parts are identical. The Aurion often gets wrecked less, so Camry parts are cheaper and easier to find.
- Holden Commodore VE and WM Statesman/Caprice -- same platform, same drivetrain. Engine parts, transmission components, suspension, brakes, and many electrical components interchange. The Statesman uses different body panels and interior trim.
- Ford Ranger PX and Mazda BT-50 -- these are the same truck with different badges. Most mechanical and structural parts are identical. Body panels and interior trim differ.
- Hyundai i30 and Kia Cerato -- shared platform. Many suspension, drivetrain, and electrical components are the same part with different part numbers. Cross-reference the OEM numbers to confirm.
- Toyota Hilux and Fortuner -- the Fortuner is a wagon built on the Hilux chassis. Front suspension, engine, transmission, and most underbody components are shared.
OEM vs Aftermarket Part Numbers
OEM part numbers are assigned by the vehicle manufacturer. Aftermarket part numbers are created by the aftermarket company. They're different numbers for the same part.
A Ryco oil filter might be listed as Z436 in Ryco's catalogue but the equivalent Toyota OEM number is 90915-YZZD2. Both fit the same cars. Aftermarket companies publish cross-reference charts so you can match their part number to the OEM equivalent.
When part numbers differ across markets
The same physical part can have different OEM numbers depending on the market it was sold in. A Hilux built for Australia might use a different part number than the same Hilux built for the Middle East, even though the parts are mechanically identical. This happens because of regional compliance markings, different packaging, or simply different parts catalogues.
If you're buying from an overseas seller, get the original OEM part number from the Australian catalogue and ask the seller to confirm their part has the same specifications. Dimensions, bolt pattern, connector type, and mounting points matter more than the number stamped on the box.
Quick Checklist Before Ordering
- Find your VIN (door jamb or windscreen base)
- Call a dealer or use an online catalogue to get the OEM part number
- Search that part number on eBay, car-part.com.au, and your local wrecker
- Cross-reference with related models to expand your search
- Compare prices across wreckers, eBay, aftermarket, and dealer
- Confirm fitment with the seller before paying