Toyota Repair: Replacing a oxygen sensor., oxygen sensors, toyota corolla

Question
HI, Well i was able to buy my oxygen sensor for my 1990 Toyota Corolla SR5 it is a universal. Now here is my question, I don't know where under the hood it is located? Nor do i know what tools i will be needing to replace it.

Answer
There are two oxygen sensors, one is located in the exhaust manifold near the radiator, this is sensor #1, this one causes the most trouble, the sensor #2 is located in the exhaust pipe behind the catalityc converter. You will need a special O2 sensor socket to remove sensor #1.