J.C. Whitney JRN96090004 Heated Downstream Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JRN96090004 is a direct-fit, OEM replacement downstream oxygen sensor designed for the 2002–2004 Nissan Altima. This heated, 4-wire sensor is engineered to restore proper exhaust gas monitoring and ensure your vehicle's engine management system operates at peak efficiency.

Key Features:

• Heated Design: Integrated heater element allows the sensor to reach optimal operating temperature quickly, improving accuracy and reducing cold-start emissions
• 4-Wire Construction: Two heater wires and two signal wires for reliable communication with the engine control unit (ECU)
• Downstream Position: Monitors catalytic converter efficiency by measuring post-catalyst exhaust oxygen content
• OEM Replacement: Designed to meet or exceed original equipment specifications for a direct, no-modification fit
• Plug-and-Play Installation: Utilizes the factory wiring connector for straightforward, bolt-in replacement

A faulty downstream oxygen sensor can trigger a check engine light (P0136, P0141, or related fault codes) and negatively impact fuel economy and emissions performance. The JRN96090004 provides a reliable, cost-effective solution to restore full sensor functionality and keep your Altima running cleanly and efficiently.