I know this is not a Magnum, but has the same motor. I've only had my Jeep srt8 for a couple of months and it recently started throwing code P0152, O2 sensor bad. My Jeep had been running rough, terrible gas mileage and an idle that wanted to die at times. I changed all four today and WOW what a difference! The idle is nice and smooth and it has a lot more power. I can't believe the difference. I hope it gets better gas mileage now. Just wanted to post how happy I am today with this easy fix. By the way, the stealership wanted $68 a piece for the sensors. I got them from RockAuto for $25 a piece. Great deal!