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Genuine vs OEM vs Aftermarket Auto Parts: Similarities and Differences

What are the similarities and differences between genuine vs OEM vs aftermarket auto parts?

  1. Quality
  2. Variety
  3. Availability
  4. Cost
  5. Warranty


If you have taken your car for parts replacement before, you might have encountered the terms “genuine”, “OEM”, and “aftermarket”. You can also read these from product listings on the web if you’re searching for parts to upgrade your vehicle. If you’re curious about the similarities and differences of genuine vs OEM vs aftermarket auto parts, keep on reading!

But first, we must define the terms so you can understand the concept of each:

  • Genuine: The components that were installed in your vehicle during manufacturing are considered genuine parts. If you go to your car brand’s branch for service, you will most probably get this type of auto part. These also carry the logo of the company.
  • OEM: Original Equipment Manufacturer (OEM) parts are the same components that came with your vehicle minus the brand name. These are manufactured by the company that made the parts for the vehicle maker.
  • Aftermarket: Aftermarket parts are replacement components produced by other companies to work with a specific type of vehicle and as many models as possible.



When you’re looking for auto parts, one of the things you probably consider is quality. A durable component will resist wear and tear and last for a long time. This also assures you that it will work for your vehicle’s make and model.

When it comes to quality, you can rely on both genuine and OEM parts to do the job. Because they’re manufactured and tested for your vehicle, you can expect them to perform the same as the part that you’re replacing.

For aftermarket auto parts, the quality of the product might vary depending on the brand. But you’ll also see options that offer the same functions as OEM parts. Some sources use lower-quality materials to decrease the price so it’s recommended to read reviews beforehand and only buy from reputable sellers.




Because other companies besides the carmaker and original equipment manufacturer can make auto parts, you have more variants to choose from when browsing aftermarket components. If you don’t know much about the things you need to look for, you might be overwhelmed with all the options. It’s best to enlist the help of a professional mechanic or do some research on your own.

When purchasing genuine and OEM auto parts, you can have peace of mind that you’re purchasing a reliable component because they’re made to fit the vehicle you have. This makes the selection process faster if you don’t have time for research.



When it comes to availability, you will get legitimate genuine parts from the maker of your vehicle. Just go to your dealership so you can have the components you need.

But if you’re looking for the same quality of components outside your dealership, you can go for OEM parts! For instance, Roberts offers world-class OEM standard products and is trusted by companies such as Honda, Hyundai, Toyota, Yamaha, Kawasaki, Isuzu, Suzuki, Hino, and Mitsubishi.

Aftermarket parts are available in most mechanic shops but you can also request OEM parts! Just order them in advance if you have specific needs for your vehicle.




One of the first things that might come to your mind while shopping for auto parts is the price. You want the perfect balance of quality and cost so you won’t regret your purchase.

The logo and assurance of quality on genuine parts make it a more expensive option compared to the others. On the other hand, OEM parts offer the same quality and function for a lower price so you get the best value for your money.

Aftermarket parts differ greatly in quality, so the price also varies depending on the manufacturer, material used, and more. But generally, you have less expensive options compared to genuine and OEM parts. It also means that you typically get what you pay for, with higher quality components costing more.



Before purchasing a product, you need to know more about the warranty so you can have it replaced or fixed when something goes wrong. If you’re purchasing genuine parts, these have a warranty for your peace of mind. Plenty of OEM part suppliers also offer this to assure you of the quality.

For aftermarket parts, you may or may not get a warranty depending on the shop you purchased it from. This keeps the costs down so you can purchase more affordable products.


Key Takeaway

When choosing between genuine vs OEM vs aftermarket auto parts for replacement, you need to consider the quality of the product, the variety of options you can choose from, availability in your area, cost, and warranty.

But if you want to balance the cost with the quality you’ll be getting, OEM parts are the best choice. You get the same functions such as genuine parts for less so you can use your vehicle with peace of mind after the replacement. OEM suppliers also provide warranties so you can get the best value for your money!

If you’re looking for OEM parts, Roberts can help you! As a world-class automotive parts provider, we are trusted by well-known brands in the Philippines.

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