OEM vs. Aftermarket Parts: What Goes on Your Car?
The difference between OEM, aftermarket and used parts, why it matters for fit, safety and value, and what your policy says.
When a car is repaired after an accident, the estimate lists every part that needs to be replaced. Some of those parts are OEM, some may be aftermarket or used. The difference matters more than most drivers think.
What OEM parts are
OEM stands for original equipment manufacturer: parts made by or for your car’s brand, the same as the ones your car left the factory with. They fit exactly, use the same materials and are designed to work with your car’s crumple zones, sensors and safety systems.
What aftermarket and used parts are
Aftermarket parts are made by other companies to fit your car. Quality ranges from good to poor. Used or recycled parts come from other vehicles of the same model. Both are usually cheaper, which is why some insurance policies allow or even prefer them.
Why it matters
- Fit and finish. Panels that do not line up perfectly leave uneven gaps and can make paint matching harder.
- Safety. Bumpers, brackets and reinforcements are part of how your car absorbs a crash. Many modern cars also have radar and camera sensors behind the bumper or windshield that rely on exact mounting positions.
- Value. A car repaired with original parts keeps its value better when you sell or trade it in.
What your policy says
Check your auto policy for the words “OEM”, “like kind and quality” or “non-original parts”. If your policy allows aftermarket parts, you can still ask for OEM and pay the difference, or ask your shop to discuss it with the adjuster.
How we handle it
We write our estimates for OEM parts and explain any differences with the adjuster’s estimate before work starts. After structural repairs, we check and calibrate the driver-assistance systems so lane-keeping, emergency braking and parking sensors work as they should. Questions about your estimate? Call us at (201) 777-3300.