Originally Posted by willwren
Nearly everyone that'* run them has been sadly disappointed.
My personal experience was an age swap. My stock Delco sensor had 70k miles on it when I bought the car. The Bosch sensor recovered mileage, but I didn't know if it was enough. 30 days later, it completely failed. The AC Delco replacement gave 2mpg better performance than the Bosch when it was new, and still performs admirably to this day (with 103k on the car now).
Many others have had similar experiences. MANY others.
damn... I just put in a Bosch sensor before reading this post!
let'* hope i'm going to be one of the lucky few that doesn't have as much trouble with them...