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REMOVAL AND INSTALLATION
 
 
caution
  • When removing or installing the linear A/F sensor or heated oxygen sensor (rear), be careful not to apply impact to the sensor.
  • Do not reuse the linear A/F sensor or heated oxygen sensor (rear) that has been dropped.
  • When the linear air-fuel ratio sensor is replaced, initialize the learned value using scan tool (M.U.T.-IIISE) (Refer to GROUP 00 - Precautions before Service, Initialization Procedure for Learning Value in DFI and MFI Engine ). <From 19 Model year>
<FWD>
Removal steps
1.Main muffler
2.Gasket
3.Exhaust center pipe
4.Seal ring
5.Heat cover
•Engine cover (Refer to GROUP 11A - Engine Cover ).
<<A>>>>B<<6.Linear A/F sensor
•Turn up the passenger's side floor carpet
<<A>>>>B<<7.Heated oxygen sensor (rear)
8.Nut
9.Exhaust front pipe
10.Gasket
11.Catalytic converter bracket
<<B>>>>A<<12.Rivet
13.Harness clamp
14.Front floor panel front heat protector
•Rear floor under cover (Refer to GROUP 51 - Under Cover ).
<<B>>>>A<<15.Rivet
16.Front floor panel rear heat protector
17.Rear floor panel heat protector
18.Bracket <From 22 Model year>
<AWD>
Removal steps
1.Main muffler
2.Gasket
3.Exhaust center pipe
4.Seal ring
5.Heat cover
•Engine cover (Refer to GROUP 11A - Engine Cover ).
<<A>>>>B<<6.Linear A/F sensor
•Turn up the passenger's side floor carpet
<<A>>>>B<<7.Heated oxygen sensor (rear)
•Transfer assembly (Refer to GROUP 23A - Transfer Assembly ).
8.Nut
9.Exhaust front pipe
10.Gasket
11.Catalytic converter bracket
<<B>>>>A<<12.Rivet
13.Harness clamp
14.Front floor panel front heat protector
•Rear floor under cover (Refer to GROUP 51 - Under Cover ).
<<B>>>>A<<15.Rivet
16.Front floor panel rear heat protector
17.Rear floor panel heat protector
18.Bracket <From 22 Model year>
Required Special Tool:
  • MB991953: Oxygen Sensor Wrench
 
 
REMOVAL SERVICE POINTS
 
 
<<A>> LINEAR A/F SENSOR/HEATED OXYGEN SENSOR REMOVAL
1. Remove the sensor connector connection and harness clip.
2. Use special tool oxygen sensor wrench (MB991953) to remove the heated oxygen sensor and linear A/F sensor.
 
 
 
<<B>> RIVET REMOVAL
cautionBe careful not to damage the heat protector with the drill.
Use a drill [6.0 mm (0.24 inch)] to make a hole in the rivet to break it, and then remove the rivet.
 
 
 
 
INSTALLATION SERVICE POINTS
 
 
>>A<< RIVET INSTALLATION
Use a rivet tool shown in the illustration to connect the parts with rivets by the following procedures.
1. Insert the rivet into a corresponding location.
2. Set the rivet tool at a portion A of rivet.
3. While pushing the flange surface of the rivet onto parts to be fixed with the rivet tool, press the handle of the tool.
4. Thin part of portion A of the rivet will be cut off and the parts is fixed in position.
 
 
 
>>B<< LINEAR A/F SENSOR/HEATED OXYGEN SENSOR INSTALLATION
In the same manner as removal, use special tool oxygen sensor wrench (MB991953) to tighten the heated oxygen sensor and linear A/F sensor to the specified torque.
Tightening torque: 44 ± 5 N·m (32 ± 3 ft-lb)