Sonata GLS V6-2.5L (2000)
2.
Lift the vehicle and remove the front pipe assembly (as shown in the picture) to access the upstream 02 sensor.
3.
Replace the B1/S1 02 sensor with the improved part (39210-3712A). Use a 22 mm 02 sensor socket.
4.
Torque the new 02 sensor to 33lb-ft.
5.
Reinstall the front pipe assembly.
6.
Lower the car and reconnect the 02 sensor connector.
BANK 2 (RADIATOR SIDE) FRONT 02 SENSOR:
1.
Disconnect the condenser fan and remove the assembly (remove two 10 mm socket bolts at the top of the assembly) to access the Bank 2 Front 02
sensor.