Lexus 89467-48011 Air Fuel Ratio Sensor

To check the oxygen sensor, locate the electrical connector and insert pins into the signal and ground terminals, then use a voltmeter to monitor the voltage signal as the engine warms up. The sensor should fluctuate between 0.1 to 0.9 volts in closed-loop mode. Inspect the heater resistance and verify it is receiving battery voltage. If the sensor fails any tests, replace it. To replace the sensor, disconnect the battery, unplug the electrical connector, unscrew the sensor from the exhaust manifold, apply an anti-seize compound to the threads, and install the new sensor. The air/fuel sensor cannot be checked for voltage without a special tool, but the resistance of the heating element can be checked with an ohmmeter. To replace the AF sensor, disconnect the battery, unplug the electrical connector, unscrew the sensor from the exhaust manifold, apply anti-seize compound to the threads, and install the new sensor.

Oxygen sensors and air/fuel sensors have different operating characteristics. Oxygen sensors are galvanic batteries that react to the oxygen content in the exhaust stream to produce a voltage output that the PCM monitors to determine the ratio of oxygen to fuel in the mixture and make the necessary correction. Air/fuel (A/F) sensors provide a variable voltage output to the PCM that's proportional to the air/fuel mixture ratio in the exhaust stream.

#89467-30040

YES, THAT PART FITS BOTH OF THE BANKS FOR THE FIRST SENSOR.