Where oil sending unit on 1998 E-350 powerstroke?

The oil sending unit on a 1998 Ford E-350 with a Powerstroke engine is located on the driver's side of the engine, near the back, close to the oil filter. It is typically mounted to the engine block and can be accessed from underneath the vehicle or through the engine bay. To replace it, you may need to move some components for better access, depending on your specific setup.