I have recently had 2 O2 sensors changed on my 98 Contour, V6, 71000 miles. The Bank 1 Sensor 1 and Bank 2 Sensor 2 were changed last week. I know that my car has 4 02 sensors and I need the other two changed also. The problem is that the other two sensors seem to be the upstream sensors and seem impossible to get to around the engine. Does anyone have a diagram of these two sensors or any techniques that could make this as painless as possible.
