J.C. Whitney JRM96090012 Downstream Heated 4-Wire Oxygen Sensor OEM Replacement

The J.C. Whitney JRM96090012 is a direct-fit, OEM-replacement downstream oxygen sensor designed for precise exhaust monitoring. This heated, 4-wire O2 sensor restores factory emissions performance and fuel management accuracy, making it a reliable solution when replacing a worn or failed downstream sensor.

Key Features:

• Direct OEM Replacement: Engineered to match original equipment specifications for a hassle-free, plug-and-play installation
• Downstream Positioning: Monitors exhaust gases after the catalytic converter to evaluate converter efficiency and ensure emissions compliance
• Heated Sensor Design: Integrated heater circuit brings the sensor to operating temperature quickly, reducing cold-start emissions and improving ECU response time
• 4-Wire Construction: Two wires dedicated to the sensing element and two wires for the heater circuit, consistent with OBD-II system requirements
• Threaded Mounting Style: Standard screw-in installation compatible with factory sensor ports

A faulty downstream oxygen sensor, also referred to as an O2 sensor or air/fuel ratio sensor, can trigger a check engine light, cause failed emissions tests, and reduce overall fuel efficiency. The JRM96090012 restores correct sensor signaling to the vehicle's powertrain control module (PCM), helping maintain optimal engine operation and catalytic converter longevity.