Re: Replacing Oxygen Sensors 3.7L V6 WK
The O2 Sensors are a lot like spark plugs. They usually wear out slowly and are not noticed until the mileage drops off dramatically. I had my first encounter with O2's after I had custom exhaust headers and system built for my WK, and started monitoring them with my onboard DashHawk. Here's the tread I did after I really started to research sensors. It may, or may not give you some hints on whether it's time to change them or not.
Oxygen Sensors and Their Role in Engine Management--A Primer
05 LX/RT & 06 WK/GCO, modded similarly, MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tube headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 90mm TB, SOS Coils/.060 plug gaps. 20 in. SRT Reps.