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i would like 2 replace the sensors on my '02 lancer myself.i was told there's an upstream,& downstream sensors.which one goes where,and what is the difficult rating on replacing these myself?
New to the forum, I drive a 94 Mitsubshi Mirage, I have a few questions and found this forum. I intend to be hands on with this car. It will be my first time doing the maintenance but I'm ready for the challenge.