OEM vs Aftermarket Replacement Parts

03 Aug 2018

OEM vs Aftermarket Replacement Parts

An OEM part is the exact part by the same manufacturer whose part is originally fit inside a brand new vehicle or machine. The quality, design and all dimensions of an OEM part will be exactly the same as the one that came with your brand new vehicle. For example, an OEM starter generator for a golf cart is the same starter generator that was fit in that cart when it was bought.
An aftermarket part is a part that is not sourced from the original OEM maker but made by another manufacturer. Although it is not the same part that comes with the brand new vehicle, it is designed to fit your vehicle and perform a similar or even a better job than the original.
One of the main differences is that you can generally be assured of the quality of an OEM part, but you need to choose carefully between the variety of aftermarket options available.
Many aftermarket parts perform same as an OEM, but there are also those which do not perform up to the mark.
We provide a short list of pros and cons to help you make a more informed decision when choosing with which part to replace in your vehicle.

OEM Parts


Assured quality: You would not need to worry about assessing the quality of an OEM part. Quality is guaranteed almost always.

Longer warranty & longer life: Most automakers back up their OEM parts with more than one-year warranty. They usually work for many years before wearing out.


Quite expensive: OEM parts will usually cost a lot more than an aftermarket part. There is more of a expense-burden to buy parts for your vehicles.
Relatively poor availability: OEMs are usually bought from their retail dealers and are not easily available online. This limits the number of places you can buy from. Many people prefer buying their parts online, as it offers many options to choose from, reviews and ratings to ensure quality and of course the comfort of getting the part delivered directly at your doorstep.

Quality may not be superior: You buy an OEM part from your hard-earned money, hoping that it would be vastly better than an aftermarket part. But that may not always be the case! Some aftermarket parts are equal to or in some cases better than OEM parts. So you might be paying extra just for the brand name.

Aftermarket Parts


Less expensive: Many aftermarket parts come at almost half the price of an oem part! However if the price of a part seems too good to be true, ask questions about its quality.

Quality can be equal to or greater than oem: In some cases, you may end up with a better part than you started with. The aftermarket companies reverse-engineer the part, and work the weaknesses out.

More variety: There are hundreds of companies that make aftermarket parts and there are many options to choose from, according to your needs.

Better availability: Many aftermarket parts are easily available online and can be ordered at the comfort of your home. Many aftermarket companies offer good customer service and replace your part easily, if it goes bad.


Quality varies greatly: The saying "you get what you pay for" can ring true here. Some aftermarket parts are inferior because of the use of lower-quality materials. Choose the aftermarket part that has good reviews online and provides a one year warranty at least.
Overwhelming selection: If you are not familiar with aftermarket brands, the selection could be overwhelming and it can difficult to choose. You should stick with the OEM part when the price difference is not significant.

May not have a warranty: To keep costs down, some aftermarket parts are sold without a warranty. Choose one which provides at least a warranty of one year.

A great place to buy aftermarket parts for vehicles like pickups, tractors and golf carts is www.partsworldusa.com. They provide high-quality aftermarket parts at massively discounted prices.

To sum it up, oem products have better quality most of the time, but aftermarket products are a lot cheaper and they get the same job done. Now that you understand the difference between OEM and aftermarket products, you can be a wise shopper of replacement parts..

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