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What Is the Difference Between OEM and Aftermarket Parts?

by Metrix Premium Chassis Parts 22 Aug 2022 0 Comments

Some believe OEM parts are better for your vehicle, but how true is that statement? After all, so many car owners prefer aftermarket parts over their OEM variants. The folks who modify their cars to unlock performance choose aftermarket products, the people living in remote areas go for them, and even racers competing in motorsport competitions prefer to take the aftermarket route. 

So why is there still a rave about aftermarket and OEM parts? Do aftermarket parts have a clear distinction over OEM components?  

What’s the difference between the two? Does it make a difference if you choose aftermarket parts over OEM and vice versa? 

We will look to answer these questions here. So, the next time you go in for a repair, you are well informed and prepared to answer any related questions.

Difference between OEM and Aftermarket Parts 

OEM is an acronym for Original Equipment Manufacturer. The abbreviation is so common nowadays that most people are unaware of its meaning, but it is simple. OEM means that the spare part you buy comes from the manufacturer that made your vehicle. These components are an exact fit for the replacement part, and they require no modifications. In the past, OEM parts were only available at the manufacturer’s dealership. Today, the components are more available at some retail stores. 

On the other hand, aftermarket parts look exactly like the original, and they also perform the same. The most significant difference between the two is the producer; aftermarket spare parts are made by a third-party manufacturer.

But that is not where you draw the line. Interestingly, some aftermarket parts perform equal to or better than an OEM component. They cost less, and they are available at almost every automotive retail store, mechanic workshop, or online store.

But why do some people still prefer one over the other? Why did the preference change from OEM to aftermarket? 

To answer these questions, we will look at the pros and cons.

Advantages & Disadvantages of OEM Parts

Let’s first shed some light on the merits, followed by a few demerits.


Hassle-Free Buying: The only thing you must do when buying an OEM part is show the dealership the unique part number, and they’ll give you the same genuine component. You don’t have to compare or match with the original. 

Quality Guaranteed: You don’t have to worry about the quality of the replacement part. That’s because the new one the same as the original. 

Covered by Warranty: The OEM parts are covered by a warranty, so you don’t have to worry about them malfunctioning. If there is an issue, you can replace the component with another one. 


Higher Cost: OEM parts are more expensive. According to a study by the Property Casualty Insurers Association of America (PCI), OEM parts are 60% more expensive than their aftermarket variants. 

Limited Availability: OEM components are usually found at the manufacturer’s dealership or select retail outlets. You can’t get them everywhere, which inconveniences some people. 

Not the Best Quality: OEMs maintain the quality of their original parts, but it is not always better than that of an aftermarket supplier. Some aftermarket components are superior in quality compared to their OEM counterparts.

Advantages & Disadvantages of Aftermarket Parts 

In contrast, let’s examine the merits and demerits of aftermarket parts.


Affordable: Aftermarket parts offer competitive pricing and can sometimes cost a lot less than the genuine variant. However, the prices vary among the various suppliers in the market. It is your job to search for the best one. 

Matches Or Exceeds OEM Quality: Not only do aftermarket spare parts match the OEM’s quality, but they sometimes do even better in that department. That’s because a third-party manufacturer is out to meet and surpass your expectations. Moreover, manufacturing costs are usually not an issue; hence, they can make high-performance parts without worrying about affordability.

Countless Varieties: Several aftermarket part manufacturers compete and the OEM to win your support. The competition among them gives you plenty of choices.

Readily Available: You can buy aftermarket components at any automotive retail shop in your area. There is no restriction in that regard. 


Variable Quality: The quality of the product will vary from one supplier to the other. Therefore, you should first research all your options and then choose the best one. 

Too Many Choices: When you have near unlimited choice in parts, you can get confused and end up with a bad one. In such cases, it is best practice to consult a professional and find a solution. 

No Warranty: Only some aftermarket brands offer a warranty. All Metrix Premium Chassis Parts come with a 3 Year / 36 000 miles warranty from the installation date.

Metrix Premium Product Warranty

Do Aftermarket parts cost less?

In some cases, aftermarket parts cost less, but the price you pay ultimately depends on a few factors. For example, a common automobile component like a windshield wiper might cost less because it is readily available. In contrast, a rare performance part would cost a lot more as only a few companies make one.

Overall, aftermarket parts cost way less than their OEM variant.    

Is Quality an Issue with Aftermarket Parts?

You should always be aware of unverified companies selling in the market. For your sake, you should search for reputable manufacturers to always get the best products. Never forget, these parts are safety critical, and you can only get the best products from the best manufacturers.

If you are looking for suspension or steering aftermarket parts, Metrix Premium Chassis Parts has a reputation far exceeding its competitors. This is because Metrix Premium’s quality policy is second to none. With our quality control procedures, no part leaves our manufacturing facility unless it is flawless. With an eye on customer needs, we constantly strive to increase productivity and proficiency for cost reduction while improving advanced quality control techniques to strive for perfection. For more details on our quality policy, please follow our page or get in touch with our customer service representatives via phone or chat if you have questions concerning a technical attribution.

Do Counterfeit or Bogus Parts Exist? 

Have you ever ordered an automobile component online and received something below your expectations? You must be very careful and buy only from a trustable company. 

How to Spot a Fake?

You should look at a few pointers to determine if a part is fake or original. Firstly, the quality of a bogus component would be questionable. Moreover, you will find quite a few spelling mistakes, so keep an eye out for that. And lastly, you should look out for odd colors as they are also a sign of a fake product.  

Which is better, OEM or Aftermarket?

The ultimate choice rests on you and your preferences. If you do your research and trust your instincts, you will always be the benefactor. Which one do you choose? You look at the part’s availability, price, quality, and warranty. Whichever brand offers you the most out of these four should be the winner. 

Turn to Metrix Premium Chassis Parts for Premium Quality Parts

At Metrix Premium, all parts are closely monitored for every aspect of production from the inception of raw material until delivery. Our applications enable us to provide fast and flexible service, shorter lead time, and competitive pricing. At Metrix Premium, our parts will stand the test of time, give you the opportunity to confidently choose which option makes the most sense for you, and get your car back on the road in no time.

Browse through our inventory and let us know if you need any help. Our customer service representatives are readily available to help you locate the precise match for your car.


Click here to explore our wide range of car parts to help you maintain and upgrade your vehicle.


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