Where are the o2 sensors located on a 2003 jeep grand Cherokee Laredo 4x4 4.0?

On a 2003 Jeep Grand Cherokee Laredo 4x4 with a 4.0-liter engine, there are typically four O2 sensors. The upstream O2 sensors are located before the catalytic converter, with one positioned on each exhaust manifold. The downstream O2 sensors are located after the catalytic converter, also with one on each side. These sensors monitor the exhaust gases to help optimize fuel efficiency and emissions.