Bosch Fuel Transfer Pumps for select BMW vehicles are designed for quiet, efficient fuel transfer from the secondary tank to the primary fuel tank. Exactly matches OE (Original Equipment) pump in form, fit, and function for a no-hassle installation process and reliable, long-term performance. Precision Bosch engineered impeller ring ensures smooth fuel flow at OE specified transfer rates without loss of suction. Bosch OE replacement fuel pumps are engineered and manufactured to the same rigorous standards as Bosch OE fuel pumps.