Denso Lambda Oxygen Sensor (DOX-0645) Fits: Mazda

The Denso Lambda Oxygen Sensor (DOX-0645) matches or exceeds OE-quality specifications, delivers peak performance, and is designed to last for the vehicle’s entire life cycle.

The oxygen sensor monitors the air-fuel mixture in the engine’s exhaust to ensure optimal combustion, improving fuel efficiency and reducing harmful emissions. It plays a critical role in engine management by providing feedback for air-fuel ratio adjustments and catalytic converter efficiency. Proper sensor function is essential for smooth engine performance and compliance with emissions standards.

Constructed with corrosion-resistant materials and advanced zirconia elements, this DENSO sensor guarantees fast response, accurate readings, and First Time Fit direct replacement.