Genuine, OEM or aftermarket? Choosing the right spare-parts grade for your workshop

Understand the differences between genuine, OEM-supplier and aftermarket parts, when each makes sense, and how to use OEM cross-references to avoid costly mistakes.

5 min readBy Noor Siddiqui

Three grades, one part number

A Toyota Hilux front brake pad set can be bought as genuine (Toyota box, 04465-0K240), OEM (the same factory supplier under its own brand) or aftermarket (an independent manufacturer such as Bosch).

When genuine makes sense

Safety-critical and warranty-sensitive items — braking, steering, airbags and electronics — where traceability matters to your customers.

When OEM-supplier parts win

Denso, Aisin, KYB, NGK and Koyo supply the factory lines. Their branded boxes deliver identical quality at 15–30% lower cost, ideal for fleet maintenance contracts.

When aftermarket is enough

Consumables such as bulbs, wiper blades, filters for older vehicles and ceramic pads for light-duty use.

Use cross-references

Our catalogue lists superseded numbers and cross-references for every part. Search by any number you have — genuine, OEM or aftermarket — and the correct item appears with its fitment table.

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