J.C. Whitney JARBM960916 Heated Upstream Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JARBM960916 is a heated, 4-wire upstream oxygen sensor designed as a direct OEM replacement. This sensor monitors the exhaust stream before the catalytic converter, providing critical air-fuel ratio feedback to the engine control module (ECM) for optimal combustion efficiency, fuel economy, and emissions performance.

Key Features:

• Heated Design: Integrated heating element allows the sensor to reach operating temperature quickly, ensuring accurate readings even during cold starts
• 4-Wire Construction: Two heater wires and two signal wires for reliable, stable signal output
• Upstream (Pre-Cat) Position: Installs in the exhaust manifold or front pipe, before the catalytic converter
• OEM Replacement: Engineered to meet or exceed original equipment specifications for a direct, plug-and-play fit
• Improved Fuel Efficiency: Proper oxygen sensing restores optimal closed-loop fuel management
• Emissions Compliance: Helps maintain proper emissions output and can resolve oxygen sensor-related check engine light codes

This oxygen sensor — also commonly referred to as an O2 sensor, lambda sensor, or air-fuel ratio sensor — is a straightforward drop-in replacement that restores factory-level engine management performance without the need for modifications.