Do all the 02 sensor's on a 2007 Ford Sport Trac the same sensor or do I have to purchase the sensors based on their location?

On a 2007 Ford Sport Trac, the oxygen sensors are not all the same; they vary based on their location. Typically, there are upstream (pre-catalytic converter) and downstream (post-catalytic converter) sensors, each with different specifications. It's important to purchase the sensors based on their specific location to ensure proper fit and function. Always refer to the vehicle’s service manual or consult with a parts specialist for the correct parts.