Review on 🚙 A27678X O2 Sensor Set for Jeep Cherokee Grand Cherokee Wrangler 4.0L - Upstream and Downstream, Sensor 1 and Sensor 2 - 234-4076, 234-4078 by Kyle Hoes

I had a constant check engine light that I wanted to remove but decided to fix the problem. So far I've only changed the input, but the improvement in driving performance has surprised me, and of course the check engine light problem is gone. On my 1998 Jeep Wrangler the replacement was fairly easy, obviously modified before because it came loose fairly easily which ended up being a 15 minute fix (but I had the right tools). Next time I jack it up I'll switch the back.