my sensor oxygen was wondering if its before or after cadillac converter on 1990 Toyota Corolla

on the sensor oxygen for my toyota corolla would it be before or after the cadillac converter its a 1990 toyota corolla

Asked by for the 1990 Toyota Corolla
It will be before the catalytic converter on this model.
3 answers
first, if you are going to diy pick up a $ 20 chilton or haynes manual. secondly the o2 sensor is located on the exhaust manifold at the front of the engine under the metal heat shield. easy replacement job.
It's before. I'm really curious what point did your Corolla become a Cadillac? Where can I get a converter like that?