Where is the oil sending unit located on a 2003 Nissan Xterra?

The oil sending unit on a 2003 Nissan Xterra is typically located near the oil filter, on the engine block. It is usually positioned on the driver's side, towards the back of the engine. To access it, you may need to remove some components or work from underneath the vehicle. Always ensure the engine is cool and take necessary safety precautions when working on your vehicle.