To remove

IMPORTANT: The cables must not be twisted. The oxygen sensor is very sensitive to impact and jolting and must be handled with care.

Remove the upper engine cover.

Fig 1: Illustration For Steps 1 To 2
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Remove the oxygen sensor connector from the holder by pressing the lugs together as shown in the illustration.
Uncut the cable tie to the oxygen sensor and draw out the cables.

Fig 2: Illustration For Steps 3 And 5
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Raise the car.
Pull down the cable and remove the oxygen sensor.