OEM vs Aftermarket Water Pumps – Sometimes, They’re The Same

Here’s a fun fact: most OEM parts are actually aftermarket brand parts with the automaker’s brand added.

Generally, OEM parts aren’t produced by the automaker itself but rather by a contract manufacturer. For example, we (GMB) are an aftermarket brand, but major automakers all over the world hire us to manufacture OEM water pumps. In fact, there’s a good chance that we built the OEM water pump in your car.

Not All Aftermarket Brands are Created Equal


There are many aftermarket brands out there that make water pumps, and they vary widely in terms of quality and fitment. That’s why it’s important to research aftermarket brands before you buy. When it comes to a critical part like the water pump, quality and fitment are of the utmost importance.

A few aftermarket brands, like GMB, are well versed in OE specs and have the expertise to build high-quality parts. We manufacture OE-quality, heavy duty, belt driven and electric water pumps. These parts have the exact same specs and design as OEM water pumps (usually because they are OEM water pumps).

How to Get the Most Value Out of a Replacement Water Pump

If you’re in the market for a new water pump, it’s natural to want to get the most value out of the new part. The best way to do this is to buy an OE-quality water pump at an aftermarket price.

By buying a GMB water pump, you’re basically getting an OEM water pump without the expensive OEM name brand. All GMB water pumps are:

  • 100% factory tested for leakage and OE dimensions
  • Tested for durability and bearing noise
  • Built with high-quality GMB bearings
  • Designed to work with OE coolant flow rate and pressure
  • Built with exact OEM dimensions

We build water pumps for all many makes and models, including GM, Chrysler, Hyundai, and Kia. Look up your car here to see if we make a replacement water pump for your vehicle.


Posted in

Stay current!

Sign up here to get the latest news
and updates on all things GMB.

Sign Up To Receive GMB News & Updates!

  • This field is for validation purposes and should be left unchanged.