Q: How to remove and replace the fuel level sensor unit, fuel filter, and fuel pump assembly?A: First, relieve fuel pressure and detach the battery if you are going to replace the fuel level sensor unit, fuel filter, or fuel pump assembly. Use pliers to remove the lock ring. Replace the lock ring and O-ring with new ones. Lift the fuel pump module from the tank, ensuring not to bend the float arm. Replace the O-ring seal and lower the module, aligning it.