The fuel sending unit that is found inside the fuel tank of your Volkswagen Rabbit is essential in providing the dash fuel gauge the exact data of the fuel level that is found in the tank. This sending unit is connected to the fuel tank. The wires that connect both of these devices should be well maintained and checked for the right power and ground. The use of fuel sending unit is really essential. Consider a condition wherein you are still miles away from your destination or a gas station and your fuel gauge is informing you that you are running out of gas. If you have already experienced such, perhaps you did not check on your fuel gauge. If you think that the fuel gauge does not play an important role in your vehicle, well think again. And if you want to know the proper volume of fuel found in your fuel tank, the fuel gauge is what you need. Of course, the fuel sending unit is included here since it is the one that provides the information to the gauge. The fuel sending unit has foam that connects itself to the metal rod. The end of this rod is connected to the variable resistor that resists the electrical flow. It uses a strip of resistive material that is fastened to the other side of the ground wiper that is used in conducting the current to the gauge and through the resistor. The amount of resistance is measured from the gap between the wiper and the strip. But there are some instances that the measurement becomes inaccurate. The sending fuel may state that the fuel is beginning to get empty where in fact there is still fuel inside the tank. Inaccuracy with the fuel sending unit definitely means trouble on its condition. And the only way to restore its efficiency is to get a replacement. For the 1981 Volkswagen Rabbit vehicles, your choice should be the E2030-17787 VDO Fuel Level Sending Unit NLA 6/06 that is available right here with us.