To be certain, you should:
* Consult your vehicle's repair manual: This is the most reliable source for the exact location on your specific year and model.
* Look closely around the oil filter: This is the most common area.
* Use a visual guide: Search online for "[Your Year, Make, Model] 5.4L engine oil pressure switch location" – images can be very helpful.
Be aware that it might be difficult to access depending on other components in the engine bay. You might need to remove some parts to see or reach it clearly.