BMW N46 120i 320i Oxygen Sensor 11787547313 Precise Match

This oxygen sensor is precisely matched to the BMW N46 engine series, suitable for 2004-2013 120i (E87) and 320i (E90), covering 1.6L–2.0L engines. Monitors exhaust oxygen content and feeds back to ECU to adjust air-fuel ratio for efficiency and emission reduction. OEM number 11787547313, exactly matches original part for easy cross-check in stock systems. Replacement difficulty is medium; use a dedicated socket tool, cool engine before installation to avoid thread damage. As a brand product, it offers stable supply and cost advantages for bulk purchases for repair shops or distributors.