Acura 3.5 RL Manual page 268

Secondary HO2S:
1. Move the front passenger's seat forward.
Pull the carpet back to expose the secondary HO2S
connector.
2. Disconnect the secondary HO2S connector.
SECONDARY
HO2S CONNECTOR
3. Remove the wire harness cover, then remove the
grommet.
WIRE HARNESS GROMMET
COVER
6 x 1.0 mm
9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)
4. Remove the heat shields.
5.
6.
HEAT
SHIELD
Remove the secondary HO2S.
SECONDARY HO2S
44 N-m (4.5 kgf-m, 33 Ibf-ft)
O
2
(Commercially available)
Install the secondary HO2S in reverse order of
removal.
SENSOR WRENCH