Use the VIN to identify the vehicle, then use the EPC to find the part number
A 17-character VIN identifies the vehicle configuration that should be searched, but it does not directly contain every OEM part number. The reliable method is to decode the VIN into the correct market version, production period and equipment, then search the manufacturer's electronic parts catalogue, or EPC, for the required component. If you need to “send me the OEM part numbers for my VIN,” start with a complete VIN and a precise parts list through the VIN Parts Lookup.
This distinction matters because one public model name can cover several engines, transmissions, trims or export specifications. The VIN narrows the catalogue context. The EPC diagram and application notes then identify the original number for the selected part. Treat a number copied from a general web listing as a lead, not as final fitment evidence.
Follow a four-step lookup process
First, copy the full 17-character VIN from the vehicle plate or registration document. Check every character; confusion between similar characters creates a search for the wrong vehicle. Second, use the VIN to identify the production date, model code, market specification and relevant equipment shown by the available catalogue data.
Third, open the correct EPC section and locate the component in its assembly diagram. Do not search only by an informal description such as “front plastic” or “engine sensor.” Record the catalogue name, diagram position and OEM number. Fourth, check the notes attached to that number, including production-date limits, engine or transmission conditions and any replacement history.
For a Geely vehicle, for example, the market model name remains useful, but the VIN and EPC context decide which catalogue branch applies. The same method should be used for filters, braking parts, lamps, mirrors, engine parts and body panels.
Check side, production changes and supersessions
A catalogue result still needs interpretation. Left-hand and right-hand parts often have separate numbers. State LH or RH from the driver's forward-facing position and confirm whether the vehicle is left-hand drive or right-hand drive when the assembly can differ. Photographs should show the installed location as well as the removed part.
Manufacturers can change a component during a model year. A connector, bracket, lamp specification or trim finish may change after a production breakpoint even though the public model name does not. That is why the VIN production information is safer than using model year alone.
Also check supersession. An original number may have been replaced by a newer service number. The old number can remain recognizable, but the supplier should show the documented relationship between old and new references. A replacement number is not the same as an aftermarket interchange number; keep those fields separate in the purchasing sheet.
Send enough information for each requested item
A buyer asking for “original numbers for air, oil, cabin and fuel filters” should not send only the VIN and the word “filters.” Use one row per requested item and include:
- -The complete 17-character VIN.
- -Vehicle market, model name and year if known.
- -Part name and installed position.
- -LH or RH where relevant.
- -A clear photo of the whole part, label, connector and mounting points.
- -The old OEM number or EPC screenshot if available.
- -Required quantity and intended destination market.
Photos are especially important when the old label is incomplete or catalogue terminology differs from workshop terminology. Keep unresolved items visibly marked. A quoted price does not prove that an uncertain reference has become a confirmed match.
Turn confirmed numbers into a controlled quotation
Once each OEM number is confirmed, return it beside the buyer's original description, vehicle context and requested quantity. This creates a traceable fitment sheet for quotation, inspection and repeat ordering. Before a bulk order, PartSail uses VIN or OEM references to confirm fitment.
Commercial terms should follow identification, not replace it. PartSail states that MOQ is negotiable from 100–200 sets per SKU and mixed containers are supported. Paid samples are available, with the sample cost refundable against bulk orders. The disclosed production lead time is 15–35 days depending on quantity and customization. Confirm the exact line terms after the SKU list, packaging and evidence are settled.
The practical rule is simple: VIN confirms which vehicle to search; the EPC supplies the part number; application notes, side, production breakpoints and supersessions determine whether that number is usable. Preserve all three layers of evidence before approving the order.