Mazda CX-9 Grand Touring 2009 Manual page 846

CMP sensor (LH) terminal B and power supply
FRONT HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION
[MZI-3.7]
HO2S (LH) REMOVAL/INSTALLATION
1. Disconnect the negative battery cable.
2. Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7] .)
3. Disconnect the HO2S (LH) connector.
NOTE:
4. Remove the HO2S (LH) using the SST.
NOTE:
5. Install in the reverse order of removal.
Fig. 25: View Of HO2S (LH), SST & Torque Specifications
Courtesy of MAZDA MOTORS CORP.
HO2S (RH) REMOVAL/INSTALLATION
1. Disconnect the negative battery cable.
2. Remove the following part for easier access.
1. Remove the cowl panel. (See COWL PANEL REMOVAL/INSTALLATION .)
3. Disconnect the HO2S (RH) connector.
NOTE:
2008 Mazda CX-9 Grand Touring
2008 ENGINE Control System (MZI-3.7) - Mazda CX-9
If necessary, lubricate the HO2S with Penetrating and Lock Lubricant
loosen to aid in removal.
Apply a light coat of anti-seize lubricant to the threads of the HO2S.
If necessary, lubricate the HO2S with Penetrating and Lock Lubricant
loosen to aid in removal.