A ABIGAIL A27678X Upstream and Downstream Oxygen O2 Sensor 1 and Sensor 2, 234-4076, 234-4078 for Jeep Cherokee Grand Cherokee Wrangler 4.0L

Theu work perfectly

Work great and so much less expensive than OEM or big parts stores.

I have a '97 Jeep Cherokee...the body of the vehicle and interior have 253,000 miles on it.Every part, down to nuts and bolts are new. One of the last things I wanted to tackle was the exhaust both front and rear including a new catalytic converter, muffler, and O2 sensors.I'm pleased with them and would use them again in a minute. Hard for me to rate the milage of use as I only have around 200 miles on the XJ since the O2 sensors were added.***I will say it is much easier to preinstall them instead of the exhaust already being in place. ;)

Fit properly and did the job at a good price.

I only needed the upstream (gray pigtail). Both are the same. Fixed my 2000 Jeep GC 4.0L, non California emmisions ( only 2 sensors). I had a very rough running engine code P0171. Longer pigtail than stock so you will need to ziptie it up. Runs great now.

I was getting a recurring check engine light which I’d clear but decided to fix the problem. To date, I’ve only changed the inbound but the drive ability improvement surprised me and, of course, the check engine light problem went away. On my 1998 Jeep Wrangler, the change out was pretty simple, it has obviously been changed before because it loosened rather easily, turned into a 15 minute fix (but I had the right tools). I’ll change the rear the next time I've got it on jack stands.

These are junk. Did not fit 2000 xj downstream or upstream connector. The downstream was a closer design but still aboslutley no way it would fit. The upstream was way diff. Not even close. Installed downstream because thats where problem was by hard wiring. Within 10 miles they failed resulting in having to cut harness and pull out sensor. Will be sending back for refund.

I only needed one (the one downstream of the catalytic converter but decided to change both since this was a two unit kit. These fixed my issue as my 1996 Jeep Cherokee would barely idle and was rough when it did sometimes shutting off. My jeep runs like a champ now. I drive it 275 + miles a week for work and I now have several thousand miles on it with no issues. I would recommend this set of Oxygen Sensors to anyone.