Left Side Curtain Airbag - 2011 528i

The F10-generation BMW 5-Series left side curtain airbag (Kopfairbag links) deploys from the roof lining along the A- to C-pillars to protect occupants during side impacts or rollovers. Primary OEM numbers include 72 10 7 204 365 for 2010-2012 production and 72 10 7 291 355 for 2013-2016 LCI models, both interchanging across F10 sedan and F11 Touring variants regardless of engine—from the N52B30 in your 2011 528i to N55 or diesel options. When sourcing from salvage, inspect the yellow connector for corrosion and verify the inflator hasn't fired by checking the tensioning wire integrity. Installation requires partial headliner removal and detachment of A, B, and C-pillar trim; always disconnect the battery and wait 15 minutes before handling to avoid accidental deployment. Store removed units face-up on a clean surface, and never probe terminals with a multimeter. Post-installation requires professional clearing of the airbag control module fault memory and possible VIN-specific coding at a BMW dealer or qualified independent shop.