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NGK direct-fit oxygen sensor for 2000–2004 Volvo S40. Oxygen sensors supply continuous closed-loop information to the engine control unit to help maintain engine performance, improve fuel economy and decrease emissions by managing air–fuel ratio and signaling OBDII systems to potential fuel delivery or catalytic problems. This NGK sensor features an advanced ceramic element with a 3-stage contaminant-resistant plasma-jet and deposit-trap overcoat to protect against element poisoning.
NGK Volvo S40 2004-2000 Direct Fit Oxygen Sensor
