J.C. Whitney JN960916 Downstream Heated Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JN960916 is a direct-fit, heated downstream oxygen sensor (O2 sensor) designed as an OEM-quality replacement. Featuring a 4-wire heated design, this sensor reaches operating temperature quickly for accurate exhaust gas monitoring, helping your vehicle's ECU maintain proper air-fuel mixture and catalytic converter efficiency.

The downstream O2 sensor — also referred to as the post-cat or after-catalyst sensor — monitors the efficiency of the catalytic converter by comparing exhaust oxygen levels before and after the converter. A failed or sluggish downstream sensor can trigger a check engine light and diagnostic trouble codes (DTCs), reduce fuel economy, and allow increased emissions.

Key Features:

• Direct-fit OEM replacement — no splicing or modification required
• Heated 4-wire design for fast sensor warm-up and accurate readings
• Downstream (after catalytic converter) location
• Threaded-in mounting style with M18 x 1.5 thread size
• Helps resolve check engine light and oxygen sensor-related DTCs
• Restores proper fuel trim, fuel economy, and emissions performance
• Sold individually

This J.C. Whitney oxygen sensor is engineered to meet or exceed original equipment specifications, ensuring a reliable, long-lasting repair for compatible Nissan and Infiniti applications.