All oxygen sensors are in the exhaust. They can either be before or after the catalytic convertor. Just because you have a code for an oxygen sensor does Not mean that it is defective. You can have a vacuum leak causing a lean code. You can also have a leaky injector that will cause a rich code.
Wher are the oxygen sensors located on a 2001 rx300 Lexus SUV
How do you change the spark plugs in 2001 lexus rx300?
Passenger side exhaust
The thermostat on a 2001 Lexus RX300 is replaced by removing the upper radiator hose and unbolting the thermostat housing. The thermostat can then be removed, a new gasket installed, and the replacement thermostat placed in the housing.
Try JC Whitney. Search engine it.
The 2001 Lexus coolant temperature sensor can be found on the front of the engine. The coolant temperature sensor will be in the vicinity of the thermostat housing.
The sensor runs under the seat and out to the exhaust pipe under the back of the car. You will have to remove the two bolts holding the seat to replace it.
Location of sensor
The 2001 Toyota Tundra front oxygen sensor torque specification is 20 pounds. The oxygen sensor bolts should be torqued in 10 pound intervals.
There are four oxygen sensor in a Maxima 2001. See Nissanhelp.com for a diagram location.
The oxygen sensor is mounted in the exhaust down-pipe
how do you replace oxygen sensor of 2001 bmw 318 ci es