Volkswagen Passat 1995 Official Factory Repair Manual page 2166

Exhaust system components, removing and installing
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.FU08.26.1
Page 4 of 10
5 - 4-pin harness
connector
Black
For Heated Oxygen
Sensor (HO2S) -G39-
and oxygen sensor
heater
6 - Heated Oxygen Sensor
(HO2S) 1 -G39-*, 50 Nm
Component location: in
front catalytic
converter
Only grease threads
with G 052 112 A3
locking compound, do
NOT allow locking
compound to get into
slots on sensor body
Voltage supply of
oxygen sensor heater
via Fuel Pump (FP)
Relay -J17-
Check oxygen sensor
heater for Oxygen
Sensor (O2S) before
Three Way Catalytic
Converter (TWC)
Page 24-27
Check Oxygen Sensor
(O2S) and oxygen
sensor control before
Three Way Catalytic
Converter (TWC)
Page 24-86
26-4
12/6/2004