Spectra Premium OS5037 4-Wire Heated Narrow-Band Oxygen Sensor

The Spectra Premium OS5037 is a direct-fit, heated narrow-band zirconia oxygen sensor designed to restore proper air/fuel ratio monitoring and exhaust emissions control. Engineered as a true OE replacement, this sensor features a 4-wire design with an OE-style round male connector that matches the vehicle's existing wiring harness exactly — no modifications required.

Key Features:

• Heated Zirconia Sensor Element: Narrow-band zirconia sensing technology for precise oxygen measurement and accurate fuel trim feedback
• 4-Wire Design: Thread-in mounting with a 4-pin round male OE connector for a plug-and-play installation
• M18 x 1.5mm Thread: Standard metric thread pitch; installs with a 7/8" (22mm) wrench
• 17-7/8" Overall Length: Full-length harness with 13.25" wiring lead (337mm) for proper routing
• Anti-Seize Pre-Applied: Factory-applied anti-seize compound protects threads from galling and corrosion, and simplifies future removal
• Protective Sensing Element Cap: Shields the sensor tip from dirt and contamination during handling and installation
• Fully Weatherproof Connector: Sealed connector resists car wash spray, puddle water, dust, and other external environmental exposure
• 100% Performance Tested: Every unit is tested to meet or exceed OE specifications before leaving the facility
• Installation Hardware Included: Kit includes rubber grommets, tie wraps, and push-in clips for a complete installation
• Spectra Part Number Engraved: Part number is permanently marked on the sensor body for easy identification

The OS5037 carries a Limited Lifetime Warranty and meets U.S. emissions standards (Emission Code: Legal US). It is sold individually and is compatible with a wide range of Ford, Lincoln, Mercury, Mazda, and Jaguar applications from the 1990s onward.