雪佛兰 上游前氧传感器 12627139 234-4763 原厂匹配设计

This upstream oxygen sensor is designed for 2007-2013 Chevrolet Silverado 1500 (4.8L/5.3L/6.0L), 2007-2014 Chevrolet Suburban and Tahoe (5.3L/6.2L) and other models, precisely matching OEM specifications. Its core function is to monitor the oxygen content in engine exhaust and feed back to the ECU in real time to optimize the air-fuel ratio, ensuring fuel economy and emissions compliance. OEM numbers include 12627139, 12645561, 12655677, 234-4763, 2348080 and 12643903, convenient for cross-checking inventory. Replacement difficulty is medium; use a dedicated oxygen sensor socket to avoid thread damage. Before installation, clean the exhaust manifold interface and apply anti-seize. This sensor length is 41 cm, suitable for upstream position, with our brand authorization supporting bulk procurement for stable supply and cost advantages.