Renault Laguna III Manual page 1361

Oxygen sensors: Removal - Refitting
K4M
Special tooling required
Mot. 1495-01 22 mm socket for removal -
refitting of oxygen sensors.
WARNING
Do not use any product designed to improve the
electrical contact in the injection computer and oxy-
gen sensor connectors or on the bodies of the oxy-
gen sensors.
Failure to respect this advice prevents the oxygen
sensor from operating correctly and results in fail-
ure to comply with the emission control standard.
WARNING
If the connections are corroded, repair the wiring
(see Wiring: Precautions for repair) (Technical
Note 6015A, 88A, Wiring).
Note:
This procedure deals with removing and refitting the
upstream oxygen sensor and the downstream oxy-
gen sensor.
REMOVAL OF THE UPSTREAM OXYGEN
SENSOR
I - REMOVAL PREPARATION OPERATION
a Remove the front engine cover.
PETROL INJECTION
17B-23
II - OPERATION FOR REMOVAL OF PART
CONCERNED
a Disconnect the brake servo vacuum pipe union (1)
from the intake distributor.
a Unclip the upstream oxygen sensor connector (2) .
a Disconnect the upstream oxygen sensor connector.
a Unclip the cable from the upstream oxygen sensor
at (3) .
a Remove the upstream oxygen sensor (4) using the
(Mot. 1495-01).
17B
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