Mercury Mystique Oxygen Sensor Replace/Remove

Have Four O2 Sensors On This , Three Were Reasonably Identified And Able To Replace By Getting Car Up On Ramps And Getting Dirty, But There...

Bank 1, Upstream,98 Mercury Mystique, Remove Coil Pack Or What? 2.5, V6. Thanks! Now If This Is Not The Problem How Do I Check For Intake...

I Have A 1998 Mercury Mystique With The 2 Litre Zetec Inline 4. The Oxygen Sensor Broke Off, And It Ran Fine For A Few Days, Then One...