6/28/07 TSB EG034-07 Revision

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EG034-07 ENGINE BANK 1 AND BANK 2 A/F AND O2 IDENTIFICATION’93 – ’08 Applicable Models

This service bulletin provides information on the proper identification of engine bank 1 and engine bank 2 for correct A/F sensor and oxygen sensor replacement.

This bulletin contains information that identifies engine bank 1 and engine bank 2 on the
following engines: 1AZ–FE, 2AZ–FE, 2AZ–FE (PZEV), 1GR–FE, 2GR–FE, 2GR–FSE, 2JZ–GE, 1MZ–FE, 3MZ–FE, 1UR–FSE, 3UR–FE, 2UZ–FE, 3UZ–FE, 5VZ–FE, and 1ZZ–FE.

�� Bank 1 (B1) refers to the bank that includes cylinder No. 1.
�� Bank 2 (B2) refers to the bank opposite bank 1.
�� Sensor 1 (S1) refers to the sensor that is located before the catalytic converters.
�� Sensor 2 (S2) refers to the sensor that is located after the catalytic converters.