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The NGK OE-style 4-wire air/fuel sensor for Toyota Prius (2004–2009) is a direct-fit replacement that restores accurate oxygen sensing to the engine control unit, helping maintain correct air–fuel ratio and steady fuel trim. This OE-type four-wire sensor provides the OEM electrical connection for an uncomplicated swap and reliable oxygen readings.
NGK 2009-04 Toyota Prius OE Type 4-Wire A/F Sensor
