How do you replace the oxygen sensor on a 1993 Lexus LS 400?

Answer 1

I replaced the main O2 sensor of bank 2 (passenger side) on my 1991 LS400. 1993 model should be similar. If you talk about the sub O2 sensor, located behind the converter, you can use the same way of changing it. First of all, jack up the car and remove the passenger side wheel to have more access to the sensor, which is located on the exhaust pipe before the converter. You need a 22mm box wrench to turn the sensor loose after using plenty of 'liquid wrench' at the base of the sensor. The socket of the sensor is secured on the engine block with a 10mm bolt. You'd better take the bolt off to make it easy to separate the socket and the plug. Installation will be the reverse of what mentioned above. Good luck!