What are the Differences between OEM, OE and Aftermarket Truck Parts?


Before deciding on what the right heavy duty truck part is right for you, it is important to understand the different classifications of truck parts. There are three main classifications: OEM, OE, and Aftermarket. To ensure you equip your rig with the highest quality products, shop at Dieter’s. We have been manufacturing truck parts since 1976 and are known for utilizing state-of-the-art equipment and using non-magnetic stainless steel. Shop a name you can trust!

Here is an Outline of Each Classification of Truck Parts

Original Equipment Manufacturer (OEM) Parts

Original Equipment Manufacturer or simply OEM replacement parts are manufactured by your truck’s manufacturer. They match the original part that came with the vehicle using the same manufacturing processes and material. One of the main benefits of OEM parts is that they are specifically built for your truck. Customers can ensure that they only receive top-quality parts that are built for your brand, make, and model of truck. However, these parts are generally more expensive than OE and aftermarket parts. Availability may also be limited depending on the manufacturer and the part you request.

Original Equipment (OE) Parts

There is normally confusion between OEM and OE parts. Original Equipment parts are not manufactured by your truck manufacturer. The company may own the design, but the manufacturing of the parts are subcontracted to another company. For instance, a heavy-duty truck manufacturer based in the US may subcontract the manufacturing to a company based in China. The truck manufacturer will source the finished parts and assemble them at their company (US). OE parts often bear the same quality of OEM parts. However, they are much cheaper due to lower manufacturing costs from subcontracting.

Aftermarket Parts

Aftermarket parts do not come from the manufacturer of your heavy-duty truck. It comes from a company that specializes in manufacturing replacement parts for different types of vehicles. The part manufacturer will come up with a part that is an exact replica of the original part. However, it may differ slightly in terms of quality, material, and reliability. Aftermarket parts are popular because they are more affordable than OEM parts but come at the risk of receiving a lower quality part. Availability is also less limited due to the vast number of aftermarket manufacturers there are.

Whether you’re looking for Kenworth truck parts, Peterbilt, Volvo, or Freightliner, Dieter’s carries a large collection of the OE parts and accessories you need. Dieter’s manufacturing services include forming, 2D laser scanning, assembly, laser cutting, and more. With 12 CNC brake presses, 3 bystronic high-speed laser cutting systems, and other top-quality machinery tools, our customers can be confident that they are getting the best. Shop our truck parts and get in touch with our team if you have any questions.