OEM parts are made by or for your car's manufacturer. Aftermarket parts are made by other companies to fit your car. Neither is automatically better.
How they compare
- OEM: matches the original fit and spec; usually costs more.
- Aftermarket: wide range of quality and price; good brands can equal or beat OEM for common parts like brakes and batteries.
- Warranty matters: compare what the shop guarantees, not just the part.
Comparing quotes fairly
If one shop quotes OEM and another aftermarket, you're not comparing the same job. Look at the brand, part number, and warranty side by side, then decide what's worth paying for. ShopCheck shows these separately for every offer.