BMW X3 Oxygen Sensor 11787530285 Universal Type OZA600-BM5 Replacement

Oxygen sensor for 2003-2010 BMW X3 (E83) 2.5L and 3.0L gasoline engines, also compatible with some BMW 3 Series (E46) models. OEM 11787530285, corresponds to Bosch OZA600-BM5 for cross-checking. Core function is real-time monitoring of exhaust oxygen to assist ECU in adjusting air-fuel ratio for improved combustion efficiency and reduced emissions. Replacement difficulty is medium; use a dedicated socket to avoid thread or wiring damage; after installation, clear fault codes with a diagnostic tool.