[bigred90gt]

Actually $165 for labor is a great deal on all that was done. Labor usually makes up abotu 80% of your repair bill.

All o2 sensors connect with a wire. Certain years (I cant remember what years) have 2 wires and others have 3 (or is it 3 and 4, I cant remember). The one with the extra wire is (I think) because they have a built in heater to assist in bringing the sensor up to operating temp. You jut need to look at the plug and see how many wires there are.