2, Before & after the catalytic converter.
The 5.2L has two oxygen sensors.
2 sensors
2
Two.
THERE ARE 2
A 1998 Chevy S10 Blazer has a total of two oxygen sensors. One is used for the upstream and one for the downstream.
It has two.
It has four.It has four.
i think there is 2
You have two oxygen sensors in Toyota Rav4, One before the catalytic converter and another after.
Two sensors, and replace them.