RoadMachinerySparesParts selection
What should you compare between genuine OEM and aftermarket parts?
The price difference matters, but a buyer first needs to know what each offer represents. “OEM reference” on an aftermarket quote identifies the target part. It is not a claim that the replacement was made or approved by the original manufacturer.
| Question | Evidence to request |
|---|---|
| Will it fit? | Model and serial applicability, assembly position, critical dimensions and connection details. |
| What is supplied? | Photos of the actual item, included seals or fasteners, and packaging description. |
| How was it checked? | Inspection criteria relevant to the part, with any unverified specifications stated openly. |
| What happens if it differs? | A documented process for comparing the delivered part with the approved reference. |
Risk depends on the position
A simple wear plate and a hydraulic drive component have different failure consequences. For a high-consequence position, ask for stronger fitment and test evidence before changing supplier. For a routine wear item, keep the reference and inspection record so repeat orders can be compared with the same baseline.
Make quotes comparable
Put the same machine details and part number in every request. Ask each supplier to state whether the item is genuine OEM, aftermarket or still awaiting verification. A low number on a quotation is not comparable if it excludes required mounting parts or quotes a different revision.
Choose the offer whose identity and fit can be checked against your machine and whose terms match the repair risk. Keep the removed part until the replacement has been verified.
Confirm machine-specific limits and procedures with the appropriate service documentation.