Spectra OS5544 Premium Oxygen Sensor OE Replacement

The Spectra Premium OS5544 is a direct-fit, OE-replacement oxygen sensor (O2 sensor) engineered to restore proper exhaust gas monitoring and fuel management to your vehicle. Designed and built to original equipment specifications, this sensor delivers accurate readings to the engine control unit (ECU), helping maintain optimal fuel economy, reduce harmful exhaust emissions, and support smooth engine performance.

Key Features:

• 100% performance tested — every unit is verified to meet OE performance standards before leaving the factory
• Manufactured under ISO 9001 and TS16949 quality standards — rigorous oversight from raw materials through final shipment
• Zirconia (Lambda) sensing element — robust construction for accurate and reliable oxygen concentration measurement
• Waterproof electrical connector — fully sealed against moisture, dust, and road spray for lasting durability
• Exact OE connector match — plugs directly into the vehicle's existing wiring harness with no modification required
• Anti-seize coating pre-applied to threads for easier installation and future removal
• Protective cap included — shields the sensing element from contamination during shipping and installation
• All installation accessories included — rubber grommets, tie wraps, and push-in clips where applicable
• Completely new — no core charge required

A failing oxygen sensor can trigger a check engine light, decrease fuel efficiency, cause rough idling, and negatively affect ignition timing. The Spectra Premium OS5544 is a reliable, cost-effective solution to restore your vehicle's exhaust and engine management system to factory performance levels.