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The NGK 5-wire wideband air-fuel sensor for Audi A4 (2001–2006) supplies a linear output that allows the ECU to precisely monitor air-fuel ratio and make continuous adjustments for efficient combustion and emissions control. Manufactured by NTK, the world's largest OEM oxygen sensor supplier with ceramics expertise, the sensor features an advanced ceramic element and a three-stage contaminant-resistant plasma jet with deposit-trap overcoat to resist poisoning.
NGK Audi A4 2006-2001 Direct Fit 5-Wire Wideband A/F Sensor
