PublishedNovember 1, 2026
Four parts can fit the same car and cost four different amounts. The difference is origin rather than luck: who made the part, under whose name it is sold, and how much of its life is already used. For a workshop, knowing which tier you are buying is the difference between a job that stays profitable and one that comes back.
What is the difference in one table?
Genuine is the manufacturer’s own part in the marque’s box, OE is the same part from the same supplier in a different box, OEM is a manufacturer-specification part sold under a supplier brand, and quality used is an inspected part from a donor vehicle. On a quote these four tiers appear under three labels: brand new for genuine, aftermarket for OE and OEM, and used for quality used parts. The table compares them on origin, packaging, price position and the jobs each tier suits.
| Tier | What it is | Packaging | Price position | Best use |
|---|---|---|---|---|
| Genuine | Made for the vehicle manufacturer and sold under the marque's own name, to the specification for that model. | Marque-branded box, labels and seals. | Highest of the new options. | Warranty work, newer vehicles, customers who ask for the original part. |
| OE | The same part from the supplier that builds it for the manufacturer, sold under the supplier's brand instead of the marque's. | Supplier-branded box, often the same part inside. | Below genuine. | Repairs where original specification matters and the box does not. |
| OEM | Made by a company that supplies vehicle manufacturers, to a manufacturer specification, though not necessarily for your exact model. | Supplier-branded box. | Below genuine, close to OE. | Everyday repairs where a known brand and a lower price both matter. |
| Quality used | Removed from a donor vehicle, inspected and graded before it is offered. | Protected for transport, not retail packaging. | Lowest of the four. | Older vehicles, discontinued parts, budget-led jobs. |
What does genuine mean?
A genuine part is the one the vehicle manufacturer sells under its own name, in its own box, made to the specification for that model and production period. It is the reference against which the other tiers are judged, and it is usually the most expensive new option. For warranty work and for customers who insist on the original part, it is the safe choice.
What is an OE part?
OE stands for original equipment, and an OE part comes from the same supplier that builds the component for the manufacturer. The part can leave the same factory line and carry the same casting marks, but it is sold in the supplier’s box rather than the marque’s. That is why OE sits just below genuine on price while offering the same specification.
What is an OEM part?
OEM stands for original equipment manufacturer: a company that supplies parts to vehicle manufacturers. An OEM-branded part is made by such a company to a manufacturer specification, but it may have been produced for a different model or a different application. It is a known brand rather than an unbranded part with no provenance.
Is aftermarket the same as OEM?
Aftermarket is the umbrella term for anything not sold in the marque’s box, so it includes OE, OEM and unbranded parts of very different quality. Calling a part aftermarket tells you where it was not bought from, not what it is. When we quote, we name the tier and the brand so the description means something.
Where do used parts fit?
A used part is removed from a donor vehicle, inspected and graded before it is offered, and it is the only tier where part of the life is already spent. Wear items such as pads, filters, belts and clutches are normally supplied new, because their remaining life is the whole point. Body panels, lights, modules, pumps and mechanical assemblies are where a good used part makes the most sense.
Does a lower tier mean lower quality?
Not automatically. A new OEM part from a supplier that builds for manufacturers can outlast a used genuine part with high mileage behind it. The tier describes origin and price position, not a single ranking of quality. What matters is matching the tier to the job: the part has to be correct for the vehicle first, and affordable second.
Which tier should a workshop choose?
Match the tier to the job rather than to habit. Warranty work and original-spec repairs call for genuine or OE; routine servicing and everyday repairs usually suit OEM; older vehicles, discontinued parts and budget-led jobs are where quality used earns its place. If the customer has a preference, the quote can show the alternatives side by side.
Can I mix tiers in one order?
Yes. A quote can carry genuine on one line and OEM or used on another, and each line names its tier, brand and part number. That lets a workshop fit the original part where the customer asked for it and a sensible alternative where they did not. Nothing about the order requires every line to be the same tier.
Why does the quote name the tier?
Because the tier is part of what you are buying, and a price without it is not comparable. Two quotes for the same part number can differ by a wide margin simply because one is genuine and the other is OEM. Naming the tier lets you compare quotes honestly and explain the difference to your own customer.
What if only one tier is available?
Some parts exist in only one form: a discontinued body panel may only be found used, and a sensor for a recent model may only be available genuine. When that happens we say so in the quote instead of substituting quietly. If a lower tier becomes available later, you will know what changed and why the price moved.
How do I check what I have been quoted?
Read the line, not just the total: part number, brand, tier and quantity should all be visible. Compare the part number with the one on the vehicle or the one you sent us, and ask if anything is unclear before you confirm. The same check applies whether you are buying for a Mercedes-Benz service or a set of braking parts for a fleet.
How do I get a quote for a specific tier?
Send the vehicle details and the part you need, and say which tier you want or ask for the options. We source to your requirement and budget, from genuine down to quality used, and the quote shows the tier on every line with freight to Sri Lanka included.