Bosch 13986 Premium OE Fitment Heated Oxygen Sensor - 4-Wire, Downstream

The Bosch 13986 is a premium OE-fitment downstream oxygen sensor designed to deliver precise, reliable performance as a direct replacement for your vehicle's original O2 sensor. Engineered with Bosch's industry-leading ceramic technology, this sensor monitors exhaust oxygen levels and transmits accurate voltage signals to the engine control unit (ECU), enabling optimal air-fuel ratio management, reduced emissions, and improved fuel economy.

Key Features:

• Premium ceramic sensing element constructed with Zirconium or Titania and Yttrium for superior resistance to mechanical and thermal shock
• Patented dual-layer filtration system — a catalytically activated fine particle filter combined with a secondary contamination barrier — extends sensor service life and ensures precise signal output
• 4-wire heated design with a 35.8-inch wire length; the fast-acting integrated heater brings the sensor to operating temperature quickly for immediate, accurate feedback
• OE-style direct plug-in connector with snug-fitting silicone boots — no cutting or splicing required for installation
• Protects the catalytic converter by maintaining proper combustion feedback, helping prevent costly premature converter failure
• 100% factory tested to Bosch's rigorous quality and performance standards before leaving the production line
• Sold individually; downstream (after catalytic converter) placement

Bosch invented the automotive oxygen sensor and has produced over one billion units worldwide. The 13986 delivers the same quality and precision found in original equipment sensors, making it a trusted choice for restoring fuel efficiency, reducing harmful exhaust emissions, and keeping your engine running at peak performance.