Repairing, not replacing, a fuel level sender saved me $200 ↗
When the gas gauge on a 1972 2002tii died, the author used an ohmmeter to confirm the tank sender had gone open-circuit, slid the housing off and replaced its broken resistance wire. He wrapped and soldered the new wire around each terminal rather than just re-tacking the old wire, which didn't hold.
Tools mentioned: Multimeter, soldering iron, resistance (nichrome) wire