Where is oil sending unit on a 99 Toyota Avalon?

The oil sending unit on a 1999 Toyota Avalon is typically located near the oil filter, on the engine block. It can be found on the driver's side, towards the back of the engine, and is usually threaded into the block. To access it, you may need to move some components or use a socket wrench to remove it. Always ensure the engine is cool and disconnected from power before attempting to work on it.