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Is the fuel sending unit same as pump?

No, the fuel sending unit and the fuel pump are separate components, though they are often located together in the fuel tank.

* Fuel sending unit: This measures the level of fuel in the tank and sends a signal to the fuel gauge in your vehicle's dashboard.

* Fuel pump: This draws fuel from the tank and delivers it to the engine.

While they share a common location for convenience, they have entirely different functions. A faulty sending unit will result in an inaccurate fuel gauge reading, while a faulty fuel pump will prevent the engine from receiving fuel.