My CEL came on, and the code says I need to replace my SH02 sensor . (By
the catalytic converter).

There seem to be a few available on line - some (Bosch's) at about $130, and
other brands near half that price. Without stating the obvious, what's the
difference?

Thanks...

....Mike

BTW, the car has about 93K miles - I bought it about 1K miles ago. 4 cyl.,
not v-tec, standard transmission