2010 BMW 550i GT xDrive Thinner Cap;. 2011 BMW 550i GT xDrive Thinner Cap;. 2012 BMW 550i GT xDrive Thinner Cap;. Part Type: Engine Coolant Reservoir Cap. Notes: Thinner Cap;. Expansion Tank Cap. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.
