Bosch 15885 Premium Wideband A/F Oxygen Sensor Upstream O2 Sensor

The Bosch 15885 is a premium upstream oxygen (O2) sensor engineered to OE specifications for precise air-fuel ratio monitoring. As the inventor of the automotive oxygen sensor, Bosch brings decades of original equipment manufacturing expertise to every sensor in its lineup, delivering the same quality trusted by vehicle manufacturers worldwide.

This wideband A/F sensor uses an advanced sensing element to continuously measure oxygen levels across the full lambda range, providing the engine control unit (ECU) with highly accurate data for real-time fuel trim adjustments. The result is optimized combustion efficiency, reduced harmful exhaust emissions, and protection of the catalytic converter.

Key Features:

• Advanced wideband sensing element for precise, continuous air-fuel ratio measurement
• True direct-fit OE connectors and harness for straightforward, no-modification installation
• Pre-coated threads with anti-seize compound included right out of the box
• 100% functional quality test — the seared appearance of the protection tube confirms every sensor has passed Bosch's rigorous performance standards
• Robust sensor design built to withstand harsh thermal cycles and extended service life
• Double laser-welded stainless steel body that is fully submersible and sealed against exhaust contamination

A failing oxygen sensor can trigger a check engine light, cause poor fuel economy, increase exhaust emissions, and accelerate catalytic converter wear. Replacing a worn O2 sensor with the Bosch 15885 restores accurate air-fuel mixture control and helps maintain peak engine performance.