This replacement pump will replace the pump included as part of your OEM assembly at vehicle manufacture. It is efficient, quiet, long-lasting, and designed to maintain the high pressures that modern fuel-injected vehicles require. The QFS manufacturing quality control process is rigorous and comprehensive and pumps are designed to last for 30,000 hours / 100,000 miles. This is a replacement pump that will be a direct fit replacement in the OEM stock fuel pump assembly/housing. In order to use this replacement pump kit, you will need to reuse your original Module/Assembly/Sending Unit.
But the Module hardly ever fails (if your gas gauge works, the Module is usually fine and reusable). That's one of the reasons you're saving--we don't insist you replace the whole Assembly. We just provide a replacement for the failed electric pump.