J.C. Whitney JARBP960914 Heated Downstream Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JARBP960914 is a heated, 4-wire downstream oxygen sensor designed as a direct OEM replacement. Positioned after the catalytic converter, the downstream O2 sensor (Bank 1, Sensor 2) monitors catalytic converter efficiency and exhaust emissions, feeding real-time data back to the Powertrain Control Module (PCM) to help maintain the optimal air-to-fuel ratio.

This sensor features an integrated heater circuit, which allows it to reach operating temperature quickly after cold starts — ensuring accurate readings and closed-loop fuel control are achieved faster. The 4-wire design includes two signal wires and two heater circuit wires for precise, reliable communication with the vehicle's ECU.

Key Features:

• Downstream placement — located after the catalytic converter (Bank 1, Sensor 2)
• Heated sensor — integrated heater circuit for fast warm-up and accurate cold-start performance
• 4-wire construction — two signal wires plus two heater wires for reliable ECU feedback
• OEM replacement — engineered to match original equipment fit, form, and function
• Direct-fit design — plug-in installation with correct OEM-style connector; no cutting or splicing required
• Standard M18x1.5 thread size for proper exhaust system fitment

A failing downstream oxygen sensor can trigger check engine lights, cause catalytic converter damage over time, and result in increased emissions. Replacing it with a quality OEM-equivalent sensor like the JARBP960914 helps restore proper engine management, fuel efficiency, and emissions compliance.