Front Heated Oxygen Sensor (HO2S1) Removal and Installation: Removal

Disconnect the negative battery cable.
Remove the heatshield with the bolts.

Fig 1: Removing Heatshield Bolts
Courtesy of SUZUKI OF AMERICA CORP.

CAUTION: The oxygen sensor (O2S) uses a permanently attached pigtail and connector. This pigtail should not be removed from the O2S. Damage or removal of the pigtail or the connector could affect proper operation of the O2S. Take care when handling the O2S. Do not drop the O2S.
Disconnect the HO2S1 connector.
CAUTION: The oxygen sensor may be difficult to remove when engine temperature is below 118°F (48°C). Excessive force may damage threads in the exhaust manifold.
Carefully remove the HO2S1 from the exhaust manifold.

Fig 2: Removing HO2S1 From Exhaust Manifold
Courtesy of SUZUKI OF AMERICA CORP.