J.C. Whitney JM960927 Downstream Heated Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JM960927 is a direct-fit, OEM-replacement downstream (post-catalytic converter) oxygen sensor designed for the Mazda CX-7 equipped with the 2.3L 4-cylinder engine. This heated O2 sensor features a 4-wire design — two wires dedicated to the internal heater circuit and two for the sensor signal — allowing it to reach optimal operating temperature quickly and deliver accurate air/fuel ratio feedback to the engine control module.

Designed as a plug-and-play replacement, the JM960927 uses a direct-fit connector that matches the factory wiring harness, eliminating the need for splicing or modifications. The downstream (post-cat) position means this sensor monitors catalytic converter efficiency and helps prevent or clear diagnostic trouble codes related to catalyst performance.

Key Features:

• Direct-fit OEM replacement — matches factory connector and mounting thread
• Heated sensor — 4-wire construction with integrated heater for fast warm-up and accurate readings
• Downstream position — mounts after the catalytic converter (Bank 1, Sensor 2)
• Application-specific design — engineered for the 2.3L 4-cylinder engine
• Threaded-in mounting style — standard M18x1.5 thread size
• Sold individually

Restoring proper oxygen sensor function helps maintain fuel efficiency, reduces emissions, and keeps your check engine light off. The J.C. Whitney JM960927 is backed by J.C. Whitney's standard replacement warranty for worry-free installation.