DriveWire RS96090001 Upstream Oxygen Sensor - 4-Cylinder 2.5L

The DriveWire RS96090001 is an OEM-replacement upstream oxygen sensor designed for the Subaru Legacy and Outback equipped with the 2.5L 4-cylinder engine. This upstream (pre-catalytic converter) O2 sensor monitors exhaust gases to help the engine control module (ECM) maintain the optimal air/fuel mixture, supporting fuel efficiency and emissions compliance.

Key Features:

• Direct OEM replacement — no modifications required for installation
• Upstream (pre-cat) sensor position for precise air/fuel ratio monitoring
• Compatible with 2.5L 4-cylinder engine applications
• Engineered to meet or exceed original equipment specifications
• Helps restore proper fuel trim, engine performance, and emissions output
• Plug-and-play wiring connector matches factory harness

The DriveWire RS96090001 oxygen sensor is built to restore accurate exhaust monitoring and eliminate fault codes associated with a failed or degraded upstream O2 sensor. It is a reliable, cost-effective alternative to dealer-sourced parts.