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The NGK direct-fit oxygen sensor for Mazda Protege (1999–2003) supplies precise closed-loop feedback to the engine control unit, helping maintain proper air–fuel ratio, fuel economy and emissions control. NTK, the world's largest OEM oxygen sensor manufacturer, uses an advanced ceramic element with a 3-stage contaminant-resistant plasma-jet and a deposit-trap overcoat to resist element poisoning and enhance durability.
NGK Mazda Protege 2003-1999 Direct Fit Oxygen Sensor
