"How do you replace an air fuel sensor on a 2000 RX300"に関する回答Yes it is a little hard to get to but it is possible. You can buy a sensor on ebay for less than $25.00. Auto part stores will charge $79.00 and up. You will need a drop light and a piece of cardboard or rug to lie on. You need to look up a where your exhaust pipe comes down. It is there. First you must disconnect the plug in behind the manifold then you can down below and unscrew the sensor. Just do the opposite for installation. I hope this helps.