Walker Products 350-84005 Oxygen Sensor Set - Four OE Replacement O2 Sensors

Designed for select Cadillac, Chevrolet, and GMC vehicles, this all-inclusive O2 sensor kit simplifies scheduled maintenance by allowing you to replace all sensors at once, reducing downtime and ensuring consistent performance across the entire exhaust system.

Each sensor in this set is built around a zirconium dioxide (zirconia) ceramic sensing element stabilized with yttrium oxide and coated with a thin layer of platinum. This construction delivers accurate voltage generation and rapid response to changes in exhaust oxygen concentration, providing the engine control unit (ECU) with the precise data it needs to maintain an optimal air-fuel mixture.

Key Features:

• Complete 4-Sensor Kit: Includes all four oxygen sensors needed for a full system replacement in one convenient set
• OE-Quality Construction: Engineered and tested to meet or exceed original equipment specifications for reliable, long-lasting performance
• Platinum-Tipped Zirconia Element: Delivers accurate readings and fast response times to support precise ECU fuel management
• Improved Fuel Economy: Restoring proper O2 sensor function helps optimize the air-fuel ratio, reducing fuel waste and lowering operating costs
• Emissions Compliance: Helps reduce harmful exhaust emissions by ensuring the catalytic converter and engine management system operate correctly
• Extreme Durability: Built to withstand high-heat exhaust environments for dependable, long-term service in both gas and diesel applications
• ISO9001/IATF 16949 Certified: Manufactured under stringent automotive quality management standards

A faulty oxygen sensor can trigger a malfunction indicator light (MIL), cause rough engine operation, reduce fuel economy, and increase exhaust emissions. Replacing all sensors simultaneously with the Walker Products 350-84005 set ensures uniform performance and helps prevent uneven wear across sensor positions. Walker Products has been a trusted supplier of fuel system components and engine management sensors since 1946.