J.C. Whitney JS960906 Downstream Heated Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JS960906 is a direct-fit, heated downstream oxygen sensor designed as an OEM-quality replacement. Positioned after the catalytic converter, the downstream O2 sensor monitors catalytic converter efficiency and provides feedback to the engine control unit (ECU) to help maintain proper emissions performance. A failed or degraded downstream sensor can trigger a Check Engine Light, increase exhaust emissions, and compromise overall engine management.

This sensor features a 4-wire heated design, which allows the sensor to reach optimal operating temperature quickly — even during cold starts — ensuring accurate oxygen readings and consistent performance. The threaded, direct-fit installation means no wire splicing or modifications are required for a straightforward replacement.

Key Features:

• Downstream (after catalytic converter) sensor position
• Heated 4-wire design for fast warm-up and accurate readings
• Direct-fit OEM replacement — no cutting or splicing required
• Threaded mounting style for secure installation
• Helps restore proper ECU feedback and emissions compliance
• Designed to eliminate oxygen sensor-related Check Engine Light codes

Replacing a faulty downstream oxygen sensor with the JS960906 can restore proper emissions system monitoring and help your vehicle pass emissions testing. Installation is straightforward using a standard 22mm (7/8 in.) oxygen sensor socket.