Quote:
Originally Posted by RandallNeighbour
You should probably replace the other two 02 sensors sooner than later. With four brand new ones in the car you'll see a nice increase in performance, fuel economy, and idle.
When I replaced all four in my boxster a couple of years after owning it I was amazed at the increase in power.
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I have been monitoring the voltage on the rear O2 sensors and they are really in good shape. I don't want to spend money for nothing.