Where is the o2 sensor located on 2005 altima?

On a 2005 Nissan Altima, the oxygen (O2) sensors are located in two main places: one is positioned before the catalytic converter (upstream O2 sensor) and the other is after the catalytic converter (downstream O2 sensor). The upstream sensor is typically found on the exhaust manifold or near the front of the engine, while the downstream sensor is located further back in the exhaust system, after the catalytic converter. To access them, you may need to lift the vehicle for better visibility and reach.