What is the Difference Between OEM Parts and Aftermarket Parts?

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When your car breaks down, you may take it to an authorized dealership for its repairs. This way, you are assured of getting original parts manufactured by the company itself. However, if you visit an independent garage, you will get low-quality aftermarket components.

What is the difference between OEM and aftermarket parts? Read on to know more.


Automobile firms produce OEM parts at the same time your vehicle rolls off the assembly line. As a result, you receive constituents that match your vehicle exactly.


  • OEM parts work exactly like the ones you replace. The vehicle was constructed with them, giving you a sense of familiarity with the performance.
  • You will get one set that fits perfectly with your vehicle, so you will not have to worry about which brand will suit your car.
  • All OEM parts are backed up with a one-year warranty.


  • OEM parts cost about 60% more than the aftermarket kind. This is usually because dealerships have to make their profit along with the original price.
  • You have to go to an authorized dealership to buy OEM components, thus limiting the number of places you can go to for replacements.


All parts not sourced from the company are termed as Aftermarket Parts. These parts do not void your car's warranty if they are direct replacements.


  • Aftermarket parts are less expensive than OEM parts. The amount you save differs from brand to brand, though cheaper types may have issues with their quality.
  • There is more variety with aftermarket parts. Different companies specialize in specific parts, meaning that you get a wider range of prices.


  • With a wide range of prices, you will get an increased variety in quality. Cheaper products will invariably result in a lower class of products.
  • You could be overwhelmed by the selection offered to you. If you do not know the correct aftermarket addition to suit your vehicle, you could end up making a disastrous choice.
  • At the heart of it all, OEM parts are created equal to maintain the quality of your car, while aftermarket parts are not.

Sansone Jr’s EZ Auto in Keyport, NJ, which is near Old Bridge, Marlboro, and Holmdel, provides OEM tools at assured prices with warranties to sustain their longevity.