J.C. Whitney JARBI960903 Heated Downstream Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JARBI960903 is a direct-fit, OEM-replacement oxygen sensor designed for the downstream (rear) position on compatible Nissan and Infiniti vehicles. Engineered to meet original equipment specifications, this heated 4-wire O2 sensor restores proper exhaust monitoring and helps maintain optimal fuel efficiency, emissions compliance, and engine performance.

Downstream oxygen sensors monitor exhaust gases after the catalytic converter, allowing the engine control module (ECM) to verify catalytic converter efficiency and fine-tune the air/fuel mixture. A failed downstream sensor can trigger a check engine light (CEL), reduce fuel economy, and cause a vehicle to fail emissions testing.

Key Features:

• Direct-Fit OEM Replacement – Designed to match the original sensor's connector, thread pitch, and wire length for a plug-and-play installation
• Heated 4-Wire Design – Integrated heater element brings the sensor to operating temperature quickly, ensuring accurate readings shortly after cold starts
• Downstream / Rear Position – Monitors exhaust output after the catalytic converter (Bank 1, Sensor 2)
• OEM-Quality Construction – Built to meet or exceed original equipment specifications for reliable, long-lasting performance
• Sold Individually – Single sensor included

Backed by J.C. Whitney's commitment to industry-standard quality, the JARBI960903 is a straightforward, cost-effective solution for restoring proper O2 sensor function and clearing related diagnostic trouble codes (DTCs).