When replacing my old oxygen sensor how many wires are there to reconect?
I'm guessing the single black 'bullet' connector is the sensor signal and the
2 wire connector jack is for the heater to the sensor.  The car is a '89 300E
Do I then splice in the new sensor or is it best to route the wiring back to
underneath the passenger footwell carpet.  Appreciate any pointers before I
start

cheers, guenter