宝马5系氧传感器 11787539126 替代0258006794 0258006808

This oxygen sensor is designed for 2005–2010 BMW 5 Series (E60/E61) with N52/N53 engines in 2.5L and 3.0L displacements, and also compatible with certain 2006–2011 BMW X3 (E83) and X5 (E70) with the same displacements. It monitors exhaust oxygen content and feeds signals to the ECU to optimize the air-fuel ratio for efficient combustion and reduced emissions. OEM number 11787539126; can replace original numbers 0258006794 and 0258006808 for cross-checking. Replacement difficulty is medium; perform cold-start replacement; use a dedicated oxygen sensor socket to avoid thread damage; apply anti-seize compound before installation to extend life. As a B2B buyer, note this sensor is a wideband type, not interchangeable with narrowband; verify vehicle VIN when purchasing in bulk.