Where is the 1998 Nissan Quest knock sensor located at?

The knock sensor on a 1998 Nissan Quest is typically located on the engine block, usually on the driver's side, near the cylinder head. It may be positioned between the intake manifold and the engine block. To access it, you may need to remove some components, such as the intake manifold or other parts obstructing access. Always consult a repair manual for your specific model for precise details.