Genuine, OEM and aftermarket parts — what is the difference
The same part comes at three prices, and all three can be "real". The difference is not the factory but the box and the quality control — and which one to buy depends on which system the part belongs to.
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What the three terms mean
- Genuine (OES) — the part in the car brand's box. It is usually made not by the brand itself but by a contract manufacturer.
- OEM — the same part in that manufacturer's own box. The item inside is often identical and the price is lower: it carries no car-brand markup.
- Aftermarket — a part from an independent manufacturer. This is where the quality range is widest: from world-class factories to unbranded workshops.
Why OEM is usually the sensible choice
Factories that supply the assembly line also sell under their own name. The part comes off the same line under the same inspection — only the box is different. So an OEM part is typically equal in quality to the genuine one and cheaper.
It is easy to verify: the box carries the manufacturer name and its own part number, usually with a list of the OEM numbers it replaces.
Where not to move away from genuine
Not all parts are equal. Where failure affects safety directly, saving money makes no sense: the gain is measured in tens of thousands of soums, the risk on a different scale entirely.
- Braking system — pads, discs, hoses, cylinders.
- Steering and suspension — tie rod ends, ball joints, control arms.
- Anything connected to airbags and seatbelt pretensioners.
- Parts responsible for fuel system sealing.
Where aftermarket fully pays off
Filters, simple rubber-and-metal parts, interior accessories, many electrical components — here a reputable aftermarket brand is not noticeably different from genuine, and the price gap is significant.
One condition: the part must have a manufacturer. The quality of an unbranded item is unknown in advance, and the only way to test it is to fit it — which means giving up the right to return.
Signs of a counterfeit
On TezDetal every shop has a name and a location, so there is someone to ask: request a photo of the packaging.
- Blurred print on the box, uneven typeface, spelling mistakes.
- No manufacturer address or contact details on the packaging.
- No number on the part itself, or one that does not match the box.
- A price far below the market with no clear explanation.
- A metal part noticeably lighter than the genuine one.
Frequently asked questions
- Are OEM and genuine the same thing?
- The part inside is often identical; the packaging differs. Genuine comes in the car brand's box, OEM in the box of the factory that actually made it. That is why OEM is usually cheaper.
- Does an aftermarket part void the warranty?
- On a car still under warranty, check the official service terms — they may specify which parts are allowed. Once the warranty has expired there is no such restriction.
- Can I just buy the cheapest aftermarket part?
- For a filter or a simple rubber part — yes, if the manufacturer is named. For brakes, steering and suspension, price should not be the first criterion.