Nissan downstream oxygen sensor 226A0EA200 234-4297 Original equipment standard, durable and reliable

Nissan downstream oxygen sensor (OEM part number 226A0EA200, compatible with 234-4297 and 1821382Z20) uses zirconia ceramic sensing element and high-temperature resistant stainless steel housing, delivering stable signal output in exhaust high-temperature environments, with durability tests showing at least OEM-level longevity. This sensor fits Infiniti/Nissan models such as Sunny, Qashqai, and X-Trail equipped with the HR16DE engine, monitoring oxygen content downstream of the catalytic converter, feeding data back to adjust the air-fuel ratio to ensure emissions compliance and fuel economy stability. Installation difficulty: medium; requires a special socket for removal.