Upstream/before cat O2 sensor replacement

[Truth Explorer]

Has any one on here done this before? It seems like a PIA to get to them. Any help would be appreciated. Thank you vedy mucht!

 

[joefnh]

They are not too bad. The best way is get them from underneath the car, get it jacked up and supported with a safety support like a jack stand. Using a 7/8" open end wrench, you should be able to position your arm and wrench to reach them fairly easily. Good luck it is worth changing them if they have gone bad. These (the upstream ones) directly affect performance and fuel efficiency.


--Joe