Left-hand Side

Disconnect the negative battery cable.
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 or damage the O2S.
Disconnect the oxygen sensor wiring harness connector.

Fig 1: Disconnecting Oxygen Sensor Wiring Harness Connector
Courtesy of SUZUKI OF AMERICA CORP.
Remove the air cleaner assembly.
Remove the brake vacuum hose.

Fig 2: Identifying Brake Vacuum Hose
Courtesy of SUZUKI OF AMERICA CORP.
Remove the knock sensor bracket bolt and bracket.

Fig 3: Identifying Knock Sensor Bracket Bolt And Bracket
Courtesy of SUZUKI OF AMERICA CORP.
Using the O2S remover DW170-010, remove the upper O2S.
CAUTION: The oxygen sensor may be difficult to remove when the engine temperature is below 48 °C (118 °F). Excessive force may damage the threads in the exhaust manifold.

Fig 4: Identifying Exhaust Manifold Upper O2S
Courtesy of SUZUKI OF AMERICA CORP.
Using the O2S remover DW170-010, remove the lower O2S.
CAUTION: The oxygen sensor may be difficult to remove when the engine temperature is below 48 °C (118 °F). Excessive force may damage the threads in the exhaust manifold.

Fig 5: Identifying Exhaust Manifold Lower O2S
Courtesy of SUZUKI OF AMERICA CORP.