Impreza WRX STI F4-2.5L Turbo (2008)
INSTALLATION
1. Before installing front oxygen (A/F) sensor, apply anti-seize compound only to the threaded portion of front oxygen (A/F) sensor to make the next
removal easier.
CAUTION: Never apply anti-seize compound to the protector of front oxygen (A/F) sensor.
Anti-seize compound: NEVER-SEEZ NSN, JET LUBE SS-30 or equivalent
2. Install the front oxygen (A/F) sensor.
3. Install the under cover.
4. Lower the vehicle.
5. Secure the front oxygen (A/F) sensor harness to the engine harness stay using the clips (A).
6. Connect the connector to the front oxygen (A/F) sensor, and secure the return hose and front oxygen (A/F) sensor harness using the clip (A).
7. Connect the ground cable to the battery.