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NGK direct-fit oxygen sensor for 2000–2001 Audi TT. Oxygen sensors provide continuous closed-loop feedback to the engine control unit to help maintain optimal engine performance, improve fuel efficiency and reduce emissions by controlling the air–fuel ratio and alerting OBDII systems to fuel delivery or catalytic converter issues. This sensor includes an advanced ceramic element with a 3-stage contaminant-resistant plasma-jet and deposit-trap overcoat to resist element poisoning.
NGK Audi TT 2001-2000 Direct Fit Oxygen Sensor
