DriveWire REPI960904 Downstream Left Oxygen Sensor OEM Replacement

The DriveWire REPI960904 is a direct-fit, OEM-replacement downstream oxygen sensor designed for select Infiniti and Nissan vehicles. Positioned after the catalytic converter on the left-hand (driver) side, this sensor monitors exhaust gas composition to help the engine control module maintain proper fuel trim, protect catalytic converter efficiency, and keep emissions in check.

Key Features:

• Position: Downstream (after catalytic converter), Left-Hand (LH / Driver Side)
• Type: 4-wire heated oxygen sensor (O2 sensor)
• Design: Direct-fit OEM replacement — no modifications required
• Function: Monitors post-catalyst exhaust gases for accurate fuel management and emissions control
• Construction: Built to OEM specifications for reliable, long-lasting performance
• Sold: Individually

A failed or sluggish downstream oxygen sensor can trigger a Check Engine light, cause poor fuel economy, and lead to catalytic converter damage over time. The DriveWire REPI960904 restores proper sensor function with a plug-and-play replacement that installs with standard tools.