Audi Workshop Service and Repair Manuals > A4 Mk3 > Power unit | Direct petrol injection and ignition system (4-cyl. 1.8 ltr. 4-valve turbo with timing chain) | Mixture preparation system, electronic inj.,Gas | Lambda probes | Removing and installing Lambda probeG39 and Lambda probe heaterZ19 before catalytic converter

Removing and installing Lambda probeG39 and Lambda probe heaterZ19 before catalytic converter

Removing and installing Lambda probe -G39- and Lambda probe heater -Z19- before catalytic converter

Special tools and workshop equipment required

t	Lambda probe open ring spanner set -3337-

Removing

–	Unplug electrical connector -3- for Lambda probe -G39- and Lambda probe heater -Z19-.

–	Unscrew Lambda probe -G39--2- using tool from Lambda probe open ring spanner set -3337-.

Installing

When installing, note the following:

Note

t	New Lambda probes are coated with an assembly paste. The paste must not get into the slots on the Lambda probe body.

t	In the case of a used Lambda probe grease only the thread with high-temperature paste. The paste must not get into the slots on the Lambda probe body. High-temperature paste → Parts catalogue

t	When installing, it is important to re-attach the Lambda probe wiring at the same locations to prevent it from coming into contact with the exhaust pipe.

l	Tightening torque: refer to overview of Lambda probes → Chapter.

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