Oxygen (O2) & Sub-Oxygen Sensors: Installation
WARNING: This page is about a different car, the 1994 Toyota Paseo. However, it is still accessible from the selected car via links, so may be relevant.
Before installing O2 sensor, apply anti-seize compound or silicone to O2 sensor threads or to mounting bolt threads. Screw O2 sensor into exhaust, or install gasket and O2 sensor using mounting bolts.