J.C. Whitney JRM96090016 Heated Downstream Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JRM96090016 is a heated, 4-wire downstream oxygen sensor designed as a direct OEM replacement. Positioned after the catalytic converter, the downstream O2 sensor monitors exhaust gas composition and reports data to the engine control module (ECM/PCM), helping maintain optimal fuel trim, reduce emissions, and prevent the illumination of diagnostic trouble codes.

This sensor features a threaded mounting design for straightforward installation and uses a standard 4-wire heated configuration. The integrated heater circuit allows the sensor to reach operating temperature quickly after a cold start, ensuring accurate readings and proper closed-loop fuel control from the moment the engine warms up.

Key Features:

• Sensor Type: Heated (4-Wire)
• Position: Downstream (post-catalytic converter)
• Mounting Type: Threaded
• Connector Gender: Male
• Design: Direct-fit OEM replacement
• Helps resolve O2 sensor-related diagnostic trouble codes (DTCs)
• Supports proper closed-loop fuel management and emissions compliance

This J.C. Whitney oxygen sensor is built to meet OEM specifications, restoring factory-level performance and fuel efficiency. A faulty downstream oxygen sensor can trigger check engine lights, increase emissions, and negatively impact fuel economy — making timely replacement essential.