Its been a while since I installed new oxygen sensors. By my reckoning I installed them about five years ago. I didn’t take a mileage reading then but I can guess it was at least 25,000 miles ago. Oxygen sensors have a life cycle of about 25,000 to 50,000 miles.
If you notice your gas mileage drop by at least 2 mpg you can guess it is your oxygen sensors. They don’t always fail and give you a code 43 or 44. Its part of your regular maintenance like plugs and wires.
They make a special socket for removing the sensor. I don’t own one. A 17mm wrench works just as well. These can be trouble to remove due to the heat and rust associated with the exhaust system.
After you have the old out and are ready to install the new, be sure to use the copper lube in the kit. If you didn’t get the copper lube go buy some. This will help with keeping the sensors from seizing in the exhaust. Coat the threads liberally just to be safe. Plug them back in and enjoy the increased mileage.
Keeping the leads away from the manifold is very important. The heat shield protects the wire from radiant heat but not from direct contact with the manifold. You can see I am using a zip tie to hold the lead away from the manifold on the driver’s side.
On the Difficulty Scale this job is a 2. If you have to solder the wires I would consider this job a 3. It was easy using the wire crimps that were sent with the kit. If you don’t want to splice your own buy the OEM replacements. I saved about 20$(US) each by doing my own splicing.
Thanks for Reading and Happy Rovering.