Are all O2 sensors located in the exhaust the same?

No, not all O2 sensors located in the exhaust are the same. There are generally two types of oxygen sensors: upstream (pre-catalytic converter) and downstream (post-catalytic converter), each serving different functions in monitoring exhaust gases. Additionally, sensors can vary in design, technology (such as zirconia or titanium), and compatibility with specific vehicle models, which affects their performance and calibration.