iDeal Automotive Group
English

Home / Guides

Illustration

What is the difference between OEM, aftermarket and used auto parts?

A guide from iDeal Automotive Group. Last reviewed November 5, 2026.

OEM parts are made by the car's original manufacturer, aftermarket parts are made by another company to work like the original, and used (recycled) parts were on another vehicle and then removed and resold. New York's DMV says an estimate and an invoice must say whether each part is used or not of original quality.

What do the terms mean?

  • OEM parts are made by the car's original manufacturer.
  • Aftermarket (non-OEM) parts are made by another company to work like the original.
  • Used or recycled parts were on another vehicle, then removed and resold.

What does an estimate have to say about parts?

New York's DMV says an estimate and an invoice must say whether each part is used or not of original quality. The DMV also says that if you want your replaced parts back, you ask in writing before work begins. Warranty and exchange parts are excepted.

What can I ask?

  • Is each part on the estimate OEM, aftermarket or used?
  • If a part is aftermarket, is it certified, and by whom?
  • Who makes or supplies it, and what warranty comes with it?
  • Can I have my replaced parts back? (New York's DMV says to ask in writing before work begins.)
  • Does my policy say anything about part types?

General information only. This page does not say what any iDeal shop offers. Naming a source does not mean any iDeal shop is certified by it or affiliated with it.

Request a repair estimate

Tell us what happened and where the damage is. A person at iDeal Automotive Group will try to reach you and connect you with one of our body shops.

Not sure which parts are on your estimate? Tell us what you were given.

Use the estimate form Calls to this number are answered by iDeal Automotive Group, who connect you to one of our body shops. Ask for a specific shop if you have one.(917) 672-3726

Read next

Request an estimateCall (917) 672-3726