宝马氧传感器 11787848486 0258030142 高效尾气检测

This BMW oxygen sensor (OEM numbers: 11787848486 / 0258030142) is designed for 2005-2013 BMW 3 Series (E90/E91/E92/E93), 5 Series (E60/E61), X3 (E83), and X5 (E70) models equipped with N52, N54, and N55 engines, covering 2.0L to 3.0L displacements. Its core function is to monitor exhaust oxygen content in real time and feed the ECU to optimize the air-fuel ratio, ensuring combustion efficiency and reducing emissions to prevent engine fault lights or abnormal fuel consumption. Replacement difficulty is moderate; it is recommended to use a professional OBD-II scanner to verify fault codes first, and to carefully heat the sensor during removal and apply anti-seize compound to protect the threads. This product is a proprietary brand, providing OEM-equivalent performance; bulk purchasing offers price advantages, suitable for repair shops or parts distributors as high-turnover stock.