J.C. Whitney JD960909 Wideband Upstream Oxygen Sensor 5-Wire OEM Replacement

The J.C. Whitney JD960909 is a direct OEM replacement wideband oxygen sensor engineered for precise air/fuel ratio monitoring in high-performance and commercial vehicle applications. Featuring a 5-wire wideband design, this upstream O2 sensor delivers accurate exhaust gas readings to the engine control module (ECM), enabling optimal fuel delivery, improved combustion efficiency, and reduced emissions.

Wideband oxygen sensors — also known as wide-range air/fuel (WRAF) sensors or lambda sensors — provide a continuous, linear output signal across a broad air/fuel ratio spectrum, offering far greater precision than conventional narrowband sensors. This makes them essential for modern engine management systems that demand tight fuel control under varying load conditions.

Key Features:

• Wideband (Wide-Range) Design: Provides continuous, precise air/fuel ratio feedback across a wide lambda range
• 5-Wire Construction: Dedicated wiring for the heater circuit, signal, and reference channels for accurate ECM communication
• Upstream Placement: Designed for pre-catalytic converter (upstream) installation for primary fuel trim monitoring
• OEM Replacement: Direct-fit replacement meeting original equipment specifications
• Durable Construction: Built to withstand high exhaust temperatures and harsh under-hood conditions

This sensor is designed as a drop-in replacement, simplifying installation and restoring factory-level engine performance. Proper upstream O2 sensor function is critical for fuel economy, emissions compliance, and preventing damage from a running rich or lean condition.