Walker Products 350-34684 Narrow-Band Oxygen Sensor Direct Fit - 4-Wire

The Walker Products 350-34684 is a 4-wire, narrow-band, direct-fit oxygen sensor (O2 sensor) engineered as a true OEM-grade replacement. Designed to restore precise exhaust oxygen measurement and proper feedback to the engine control unit (ECU), this sensor helps maintain optimal fuel trim, reduce harmful emissions, and protect fuel economy.

Key Features:

• 4-Wire Direct Fit Design – Plug-and-play connector matches the OEM harness for straightforward installation without splicing
• Narrow-Band Sensor Technology – Delivers the voltage signal the ECU requires for closed-loop fuel management
• Dual Lower Shield Design – Protects the ceramic sensing element from exhaust debris and thermal shock
• Laser-Welded Body and Shield – Ensures a robust, leak-free construction built to withstand high-heat exhaust environments
• Plasma-Sprayed Protective Coating – Adds an additional layer of corrosion and contamination resistance
• High-Temperature Sleeving – Shields the wiring from extreme underhood heat
• 100% USA Performance Tested – Every sensor is engineered, assembled, and tested in the USA to exact OE fit, form, and function standards
• ISO9001/TS 16949 Certified Manufacturing – Produced under rigorous automotive quality management standards
• 1-Year Warranty

A faulty oxygen sensor can cause poor engine performance, increased fuel consumption, elevated exhaust emissions, and may trigger a malfunction indicator light (MIL/Check Engine Light). The Walker Products 350-34684 is a reliable, direct replacement that restores proper ECU feedback and helps prevent downstream catalytic converter damage. Walker Products has been manufacturing engine management sensors and fuel system components since 1946.