Spectra Premium OS5319 Upstream Oxygen Sensor with Federal Emissions

The Spectra Premium OS5319 is a direct-fit upstream oxygen sensor (O2 sensor) engineered to meet or exceed original equipment performance standards. Designed for vehicles with federal emissions configurations, this replacement sensor restores accurate exhaust oxygen monitoring to keep your engine management system operating at peak efficiency.

The oxygen sensor continuously monitors the oxygen concentration in the exhaust stream and communicates that data back to the ECU, allowing the onboard computer to fine-tune the air/fuel mixture for optimal fuel economy and reduced emissions. A failed or degraded O2 sensor can result in decreased fuel economy, rough idle, and poor engine performance.

Key Features:

• OE-Level Fit and Performance — Engineered to OE specifications for a direct drop-in replacement with no modifications required
• Exact Connector Match — Electrical connector precisely matches the vehicle's mating harness for a plug-and-play installation
• Anti-Seize Thread Coating — Pre-applied anti-seize coating on threads simplifies installation and prevents future seizing
• Protective Transport Cap — Sensing element is shielded with a protective cap during shipping to prevent contamination from dirt and debris
• 100% Performance Tested — Each sensor undergoes extensive computerized testing to ensure real-world performance
• ISO 9001 & TS16949 Certified Manufacturing — Produced under strict quality management standards covering raw materials, in-process controls, and final inspection
• Dust-Free Production Environment — Precision electronic components assembled under controlled conditions for consistent quality
• Brand Identification — Spectra Premium part number engraved directly on the sensor for easy verification
• Completely New — No Core Charge — Not remanufactured; zero core deposit required

The Spectra Premium OS5319 upstream O2 sensor is the reliable, cost-effective choice for restoring proper exhaust monitoring, protecting catalytic converter longevity, and maintaining the fuel efficiency your vehicle was designed to deliver.