Yup, just like the pre-96 $98 NTK's from Amazon.

 

Thank you silver slug ! I just bought the 25044 ones for my 97. Im pretty sure they have never been changed ... in fact one of them was dieing for a replacement soooooo bad, it was jiggling around on the upper. LOL

Thanks to whom posted the info about not changing the lower ones ! big savings there.

Now I just have to figure out how to put the connectors in ..... or rather un clip the old ones ....

 

I replaced all four sensors on my '99 D1 with some NTK sensors from Rock Auto. They were less than $50 each, much cheaper than some other places. I also replaced the Y-pipe while I was at it, and these threaded right in (used a dab of anti-seize on them). 'Course the muffler shop that installed them had some issues with disconnecting and reconnecting the wiring harnesses, especially the upper one on the left side, which apparently is above the transmission. They told me they had to disconnect and reconnect by touch, since they couldn't even see it. And that might be why that particular sensor was throwing a code for a problem heater circuit. Turns out one of the pins in the harness got pushed back, and wasn't connected to the other end, and was throwing the code...