Where is the oxygen sensor on a 1998 Lexus GS300?

On a 1998 Lexus GS300, the oxygen sensors are located in two main areas: one is situated in the exhaust manifold before the catalytic converter (upstream sensor), and the other is located after the catalytic converter (downstream sensor). To access these sensors, you may need to lift the vehicle and remove any necessary underbody panels or components for better visibility and reach. Always ensure the engine is cool before attempting to work on the exhaust system.