Where is the A/F sensor located in a 2000 RX300 ?

Can it be serviced / cleaned ?

 

There are two A/F sensors and one O2 sensor.

The two A/F sensors and O2 sensor are located in the following areas noted in the next few photos.

Unless you have CEL that indicates a possibility of an A/F sensor (and even then let us know in forum what the codes are before doing anything), I don't advocate taking them out or cleaning them.

 

A/F sensor: Bank 2, Sensor 1, you can see this one in the engine bay on the exhaust manifold.

 

A/F Sensor Bank 1 Sensor 1, you have to crawl underneath and look up or get the vehicle up on a lift.

 

O2 Sensor, Bank 1, Sensor 2. Underneath the vehicle between the main catalytic converter and resonator.

 

Here is a closer look at the A/F sensor (this one is from the rear, bank 1, sensor 1)

 

The O2 sensor, Bank 1, Sensor 2

 

A/F Sensor Bank 2, Sensor 1 (exposed view):