Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
NGK 4‑wire air‑fuel (wideband) sensor for Toyota 4Runner (1999–2000) delivers a linear air‑fuel ratio signal enabling the ECU to finely adjust mixture for improved combustion and emissions control. NTK's ceramic expertise is applied to the sensor element, which includes a 3‑stage contaminant‑resistant overcoat to reduce poisoning risk. As a direct‑fit replacement, it helps restore accurate closed‑loop feedback and engine efficiency.
NGK Toyota 4Runner 2000-1999 Direct Fit 4-Wire A/F Sensor
