Which one is the right one for our cars? i see two..
O.E. Replacement., 2.0L(MPI) Mdls
and
Rear O.E. Replacement., 2.0L(MPI) Mdls.
here's the link...

http://www.nopionline.com/index.cfm?fuseaction=dspparts&vL1ID=0&makeid=250&modelid=015&catyear=1997&catid=0020&pcid=973&vTitle=1997%20MITSUBISHI%20Eclipse%20Exhaust%20Oxygen%20Sensor

just read a post.. seems like this NOPI o2 ain't all that great. cheap tho.. i'll jus get the one from Satan..

Hey, if you need the rear - you don't have to buy a real one. The only thing the rear one does is throw a CEL when it goes bad. I just installed an o2 simulator from Caspers Electronics. It cost $49 and works perfectly(got rid of the CEL).

http://www.casperselectronics.com/cgi-local/store/commerce.cgi?product=IMPORTS


ride__________95 Eclipse RS : 5 speed
power________Gude cams : AFX UDP : ram air : test pipe : GST catback
suspention___BOMZ F/R upper strut bars : ES inserts
sound________Kenwood KDC 5000 : Audiovox 8" sub toob - no sub amp(damnit!)
shizzle_______AutoCommand remote start : dual air horns : Caspers o2 simulator(rear)
incomming___Hurricane F/R lower strut ties : Jeep TB : Field SFC Hyper-R

this is the cheap way for the o2 simulator
only costs pennies and does the same thing as the casper unit

http://www2.cesa12.k12.wi.us/brent/personal/neon/pic/cat_resistor.html