J.C. Whitney JRK96090005 Heated 4-Wire Downstream Oxygen Sensor OEM Replacement

The J.C. Whitney JRK96090005 is a direct-fit, OEM replacement oxygen sensor designed for the downstream (rear) position. Built as a heated, 4-wire O2 sensor, it features an integrated heater circuit that brings the sensor up to optimal operating temperature quickly, ensuring accurate exhaust gas readings and efficient fuel management regardless of engine load or ambient conditions.

This sensor monitors exhaust gases exiting the catalytic converter, providing the engine control module (ECM) with feedback used to evaluate catalytic converter efficiency and maintain proper air/fuel ratio. A faulty downstream oxygen sensor can trigger a check engine light (CEL), reduce fuel economy, and cause failed emissions tests.

Key Features:

• Direct-fit OEM replacement — plug-and-play installation with no splicing or wiring modification required
• Heated 4-wire design — integrated heater element reaches operating temperature faster for improved cold-start performance
• Downstream / rear position — monitors post-catalytic converter exhaust gases to assess catalyst efficiency
• Threaded-in mounting style — standard M18 x 1.5 thread pitch for straightforward removal and installation
• OEM-equivalent performance — meets or exceeds original equipment specifications for accurate ECM feedback
• 1-year, unlimited-mileage warranty — backed by J.C. Whitney's standard replacement warranty

Restoring proper oxygen sensor function helps maintain optimal fuel efficiency, reduces harmful emissions, and prevents unnecessary wear on the catalytic converter. The JRK96090005 offers a cost-effective, quality alternative to dealer-sourced OEM parts.