I've got to replace my down-stream o2 sensor, and upon searching
online, I've come up a few Brands/Part #'s .. I'll probably get the
STANDARD MOTOR PRODUCTS brand, but I've seen the SG268, and the SG300
both mentioned as working.. the SG300 is a "universal" sensor, but I
don't know quite what that means, .. is it just very common?

I was wondering if anyone had any experience with this, and could
recommend which one I buy..

Thanks in advance! Fellow Jeepers on this NG are always so helpful!

-Dave