J.C. Whitney JRM96090021 Heated Downstream Oxygen Sensor 4-Wire OEM Replacement

The J.C. Whitney JRM96090021 is a direct-fit, heated downstream oxygen sensor designed as an OEM-quality replacement. Featuring a 4-wire heated design, this sensor reaches optimal operating temperature quickly, ensuring accurate air-fuel ratio feedback to the engine control module for consistent combustion efficiency and reduced emissions.

The downstream (post-catalytic converter) position of this O2 sensor allows the ECM to monitor catalytic converter efficiency and fine-tune fuel delivery. A failed or sluggish downstream oxygen sensor can trigger a check engine light, cause failed emissions tests, and reduce fuel economy.

Key Features:

• Direct-fit OEM replacement — no splicing or modification required
• 4-wire heated element for fast warm-up and reliable signal output
• Downstream (post-cat) sensor placement
• Helps restore fuel efficiency and clear oxygen sensor-related fault codes
• Backed by J.C. Whitney's 1-year, unlimited-mileage warranty

This sensor is built to meet or exceed original equipment specifications, making it a reliable and cost-effective solution for restoring proper emissions system function.