The fuel pump delivers pressurized fuel from the tank to the injectors.
An in-tank electric pump (or mechanical high-pressure pump on direct-injection systems) maintains the rail pressure the ECM expects.
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Replacement runs $450–$1400 including parts and 1.5-5 hours labor. Exact cost depends on vehicle, parts tier (OEM vs aftermarket), and local labor rate.
Expected lifespan is 100,000-150,000 miles. Driving conditions, climate, and maintenance affect real-world life.
Cranks but will not start; Stalling under load; Whining from fuel tank; Hard starts when warm; Loss of power at high speed.
Most modern fuel pumps are sealed units that get replaced rather than rebuilt. A shop will diagnose, confirm with a load or output test, then swap the unit and verify operation.