Removing and installing exhaust gas temperature sender 3 G495/exhaust gas temperature sender 4 G648 — AUDI

Removing and installing exhaust gas temperature sender 3
G495
/ exhaust gas temperature sender 4
G648
Special tools and workshop equipment required
Tool set
T10395 A
Suitable tool insert, AF 19
Removing
WARNING
When working on all parts of the exhaust system:
Observe safety precautions when working on the exhaust system (see “Safety precautions when working on the exhaust system”).
Note
Re-fit all cable ties and heat insulation sleeves in the same locations when installing.
When removing, the electrical wiring must not be cut, otherwise a fault diagnosis would no longer be possible.
Remove engine cover panel (see the separate procedure).
If fitted, open heat shield sleeve.
Detach electrical connectors from bracket, unplug connectors and move electrical wiring clear:
For exhaust gas temperature sender 3
G495
For exhaust gas temperature sender 4
G648
Note
Disregard items 3, 4.
To remove exhaust gas temperature sender 4
G648
, first remove front exhaust pipe (see the separate procedure).
Unscrew relevant exhaust gas temperature sender using a tool from tool set
T10395 A.
Exhaust gas temperature sender 4
G648
Exhaust gas temperature sender 3
G495
Installing
Installation is carried out in the reverse order; note the following:
Caution
Risk of malfunctions caused by improperly secured exhaust gas temperature senders.
The threads of the exhaust gas temperature senders
G495 and
G648 are coated. It is important that you do NOT coat them additionally with high-temperature paste and that you tighten them to the specified torque.
Note
Take care to protect exhaust gas temperature sender from knocks and impact; if dropped, the exhaust gas temperature sender can no longer be used.
Electrical connections and routing (repair group 97: Relay carriers, fuse carriers, electronics boxes; Overview of fitting locations - relay carriers, fuse carriers, electronics boxes) and
Current flow diagrams, Electrical fault finding and Fitting locations.
Install engine cover panel (see the separate procedure).
Tightening torques (see “Exploded view - exhaust gas temperature control”) (see “Exploded view - silencer”)