Spectra Premium OS5458 Oxygen Sensor Downstream Heated 4-Wire Zirconia

The Spectra Premium OS5458 is a direct-fit, downstream oxygen sensor (O2 sensor) engineered to OE specifications for a precise drop-in replacement. Utilizing a zirconia sensing element with a 4-wire heated design, this sensor enables your engine control module to accurately monitor exhaust oxygen levels, regulate the air/fuel mixture, and maintain catalytic converter efficiency — helping restore proper engine performance, fuel economy, and low emissions.

Key Features:

• Heated zirconia sensor type with square female connector and 4 terminals for OE-accurate signal output
• Overall length: 31-1/2 inches — designed for a precise OE fit
• Downstream position for post-catalytic converter exhaust monitoring
• Waterproof connector resistant to car washes, puddle spray, and dust contamination
• Anti-seize pre-applied to the threads to prevent galling and corrosion during installation
• Protective cap shields the sensing element from dirt and contamination before installation
• Comes complete with all required rubber grommets, tie wraps, and push-in clips — ready to install out of the box
• Completely new unit — no core charge required

Rigorous Quality & Testing:

• Manufactured under ISO 9001 and TS16949 quality management standards
• Prototype validation includes engine bench testing, performance testing, salt water submergence, exhaust seal leak, connector leak, and wire pull tests
• Production-level welding, electrical, and sealing inspections performed on every unit
• Third-party lab testing for resistance to water, humidity, vibration, and extended product life cycle

Backed by Spectra Premium's Limited Lifetime Warranty, the OS5458 oxygen sensor is built to restore your vehicle's emissions system performance with the confidence of OE-level engineering and one of the most thorough testing processes in the aftermarket industry.