Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
NGK 5‑wire wideband air‑fuel ratio sensor for Audi A4 (2005–2009) applications delivers a direct-fit linear AFR signal so the ECU can precisely adjust the air‑fuel mixture for efficient combustion and lower emissions. The sensor reflects NTK's OEM manufacturing scale and ceramics capabilities, incorporating an advanced ceramic sensing element with a 3-stage contaminant‑resistant plasma jet and deposit‑trap overcoat to guard against element poisoning and enhance long-term performance.
NGK Audi A4 2009-2005 Direct Fit 5-Wire Wideband A/F Sensor
