Replace oil sending unit

To replace the oil sending unit, first, ensure the engine is cool and disconnect the battery to avoid any electrical issues. Locate the oil sending unit, typically found near the oil filter or on the engine block, and disconnect the electrical connector. Use a socket or wrench to remove the old unit, then install the new one by tightening it securely and reconnecting the electrical connector. Finally, reconnect the battery and check for any leaks after starting the engine.