J.C. Whitney JARBH960908 Downstream Heated Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JARBH960908 is a heated, 4-wire downstream oxygen sensor designed as a direct OEM replacement. Positioned after the catalytic converter, this sensor monitors exhaust gas oxygen content to help the engine control unit (ECU) assess catalytic converter efficiency and maintain optimal fuel trim — a critical function for emissions compliance and fuel economy.

Key Features:

• OEM Replacement: Engineered to match original equipment fit, form, and function for a straightforward installation
• Heated Design: Built-in heating element reaches operating temperature quickly, improving cold-start performance and reducing emissions during warm-up
• 4-Wire Configuration: Two wires for the heater circuit, two for the sensor signal — compatible with the factory wiring harness
• Threaded-In Mounting Type: Screws directly into the factory bung in the exhaust system for a secure, leak-free fit
• Downstream / Post-Catalyst Position: Monitors catalytic converter output to support OBD-II catalyst efficiency diagnostics
• Direct Fit: Designed for the 2003–2007 Honda Accord

A failing downstream oxygen sensor can trigger a Check Engine light, reduce fuel efficiency, and cause failed emissions tests. The JARBH960908 restores proper sensor function and helps clear related diagnostic trouble codes (DTCs) such as P0136, P0137, or P0420 when combined with a healthy catalytic converter.