OEM vs Aftermarket Auto Parts: What's the Difference?
When shopping for replacement automotive parts, you'll often see products described as either OEM or aftermarket. Understanding the difference can help you choose the right component for your vehicle and budget.
Both types of parts can be suitable options, but they aren't necessarily identical.
What Are OEM Parts?
OEM stands for Original Equipment Manufacturer.
An OEM part is made by the vehicle manufacturer or by a supplier producing components to the manufacturer's specifications.
OEM parts are generally designed to closely match the component originally installed on the vehicle.
Potential advantages include:
- Vehicle-specific design
- Consistent specifications
- Straightforward replacement in many applications
- Familiar manufacturer part numbers
However, OEM parts can sometimes be more expensive than aftermarket alternatives.
What Are Aftermarket Parts?
Aftermarket parts are produced by companies other than the vehicle's original manufacturer.
The aftermarket industry covers an enormous range of products, including replacement components, maintenance items and performance upgrades.
Depending on the manufacturer and product, an aftermarket component may be designed as a direct replacement or may offer different materials, features or specifications.
Is Aftermarket Always Cheaper?
Not necessarily.
Many aftermarket replacement parts are competitively priced, but price varies considerably depending on the manufacturer, materials, design and application.
Some premium aftermarket components can actually cost more than their OEM equivalents.
Price alone shouldn't be used to determine whether a part is suitable for your vehicle.
Which Should You Choose?
The best option depends on what you're replacing and what you need from the vehicle.
For a standard repair, a quality aftermarket replacement may provide a practical alternative to an OEM component.
For certain specialized components, you may prefer OEM specifications.
Most importantly, make sure the part is actually compatible with your particular vehicle.
Check Fitment Before Ordering
Whether you're buying OEM or aftermarket, always check:
- Vehicle year
- Make and model
- Engine
- Transmission where applicable
- Drivetrain
- Body style
- Part position
- OEM or existing part number
- Product-specific fitment notes
Even vehicles of the same year and model can use different parts.
Need Help Finding the Right Part?
USA Auto Parts Direct supplies replacement and aftermarket automotive parts for cars, trucks and SUVs.
If you're unsure whether a component is suitable, email usaautopartsdirect@gmail.com with your vehicle year, make, model, engine and OEM or existing part number where available.
Our team can help you identify the appropriate options before you order.