Audi Workshop Service and Repair Manuals > A3 Mk2 > Power unit | Direct petrol injection and ignition system (5-cyl. 2.5 ltr. 4-valve turbo) | Mixture preparation system, electronic inj.,Gas | Lambda probes | Removing and installing Lambda probeG39 with Lambda probe heaterZ19

Removing and installing Lambda probeG39 with Lambda probe heaterZ19

Removing and installing Lambda probe -G39- with Lambda probe heater -Z19-

Special tools and workshop equipment required

t	Lambda probe open ring spanner set -3337-

Removing

–	Lift off engine cover panel -1--arrows-.

Note

t	Fit cable ties in the original positions when installing.

t	Fit heat insulation sleeves in the original positions when installing.

–	Remove bolts -arrows-.

–	Release hose clips -1- and -2- and remove air pipe.

–	Remove electrical connector -1- for Lambda probe -G39- from bracket and unplug connector.

–	Move clear electrical wiring for Lambda probe.

Note

Disregard -items 2, 3-.

–	Detach heat shield sleeve.

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

Note

Disregard -item 1-.

Installing

Installation is carried out in the reverse order; note the following:

l	Tightening torque → Chapter „Lambda probes - overview“

Note

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	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 probe body. For high-temperature paste refer to → Electronic 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.

–	Install air pipe → Rep. gr.21.

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