A part number looks simple, but fitment is where most costly mistakes begin. The same vehicle name can hide different engines, different facelifts and different left- or right-hand-drive layouts, each with its own components. This page explains how we match parts and what you should tell us so the first shipment is the right one. The principle is constant: match by technical configuration, not by the model name alone.
Confirm fitment by the original part number read from the component or traced from the VIN, then check the supersession record, look up interchange numbers, verify critical dimensions and interfaces, and cross-check against model year and engine code. Reporting model year, displacement, drive side and emission standard together prevents most mismatches and returns.
Different model years of the same vehicle often carry hidden differences. Brake disc bore diameters can differ by around 2 mm between years, and damper, ball joint and lighting interfaces also change with facelifts. Two 1.5L engines may belong to different engine families with non-interchangeable part numbers. Drive side changes steering, lighting and some interior parts. Emission stage changes aftertreatment and sensor parts. None of these differences shows up in the model name, so quoting by name alone invites a wrong part.
The safe basis is the original part number on the component, or the VIN, supported by brand, model, model year and engine code. We use that combination for every quotation and treat the catalogue match as a candidate to be verified, not a conclusion.
The most reliable starting point is the part number stamped or printed on the original component. If the part is gone, the OE number can often be traced from the VIN, which carries the vehicle configuration. From there we check the supersession record: manufacturers replace numbers over time, and the current valid number may differ from the one printed on an old part. Using a superseded number without checking can pull the wrong item.
When an OE number is unavailable, we work from brand, model, year, engine code, drive side and emission standard. The more of these you can supply, the tighter the match. This is why our inquiry form asks for the full set rather than a single field.
A cross-reference lets one part serve several brands and models through its interchange numbers. This is genuinely useful for coverage, but it has a hard limit: correctly formatted catalogue data does not guarantee the fitment is factually correct. Different brands can share the same numeric code while pointing to completely unrelated parts, and a number valid for one variant may not suit another.
We therefore treat the cross-reference as one input among several. The decisive checks are the critical dimensions and interfaces: bore diameter, thread pitch, connector pins, mounting points and sensor type. Only after those line up do we treat the part as confirmed.
Bring fitment confirmation forward, before the goods move. The steps are: read the part number on the original component or trace the OE number from the VIN; check the supersession record and confirm whether it has been replaced; look up interchange numbers and list alternative brands and models; verify critical dimensions and interfaces including bore, thread pitch and connector pins; and cross-check against model year and engine code, then place the order.
Report model year, displacement, left- or right-hand drive and emission standard all at once. Checking item by item after a return is far more expensive than confirming up front, and it protects both the vehicle and your stock accuracy.
An OE number is the original equipment part number stamped or printed on the component. If the part is missing, it can often be traced from the VIN through the vehicle configuration.
It can. Manufacturers supersede numbers over time. We check the supersession record and confirm the current valid number before quoting, so a discontinued number does not pull the wrong item.
Yes, different brands can share a numeric code that points to different parts. That is why we verify critical dimensions and interfaces rather than trusting the catalogue match alone.
Two engines with the same displacement may belong to different families with non-interchangeable parts. The engine code removes that ambiguity for powertrain and sensor components.
For steering, lighting and some interior parts it does. Those parts are not interchangeable between drive configurations, so we always record drive side before quoting.
Supply the original part number or VIN plus model year, engine code, drive side and emission standard in one inquiry, and let us run the five-step verification before the order is placed.
Send the OE number or VIN with model year and engine code for a verified quotation.
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