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Removing and installing Lambda probe after catalytic converter - bank 2 (left) > < Removing and installing Lambda probe before catalytic converter - bank 2 (left)

A4 Cabriolet Mk2

Removing and installing Lambda probe after catalytic converter - bank 1 (right)
Removing and installing Lambda probe after catalytic converter - bank 1 (right)
Special tools and workshop equipment required
   
t  Lambda probe open ring spanner set -3337-
  W00-0206
Removing
  Note
All cable ties which are released or cut open when removing must be refitted in the same position when installing.
–  Pull off engine cover (rear) -arrows-.
  A10-1515
–  Pull non-return valve -1- off connection at air intake hose.
–  Remove air intake hose. To do so, release hose clip -2- and clamps -arrows-.
  A10-10124
–  Unplug electrical connector -2- for Lambda probe after catalytic converter -G130- and move wiring clear (downwards).
  Note
Disregard -item 1-.
  A24-10034
–  Unscrew Lambda probe -1- using Lambda probe open ring spanner set -3337-.
  Note
Shown in illustration with engine removed.
Installing
Installation is carried out in the reverse order; note the following:
  Note
t  Renew O-ring.
t  Threads of new Lambda probes are already coated with assembly paste; the paste must not get into the slots on the probe body.
t  If reinstalling the old Lambda probes, coat the threads with high-temperature paste → Parts catalogue. The paste must not get into the slots on the probe body.
t  Fit all cable ties in the original positions when installing.
t  When installing, the Lambda probe wire must always be reattached at the same locations to prevent it from coming into contact with the exhaust pipe.
Tightening torque
  A24-10036
ComponentNm
Lambda probe in front exhaust pipe55

   

Removing and installing Lambda probe after catalytic converter - bank 2 (left) > < Removing and installing Lambda probe before catalytic converter - bank 2 (left)