Where is bank 1 sensor 1 located on 2004 Dodge 2500 5.7 liter engine?

On a 2004 Dodge 2500 with a 5.7-liter engine, Bank 1 Sensor 1 (upstream oxygen sensor) is located on the passenger side of the engine. Specifically, it is positioned in the exhaust manifold, before the catalytic converter. This sensor monitors the oxygen levels in the exhaust gases to help optimize engine performance and emissions.