I've got vintage vitreous enamel plates that are going on the 328.. was looking at how they would be mounted today at the dealership.. looks like the rear will need a custom bracket made to extend the pre-existing holes out to the plate mounting holes.. (they can't be drilled) and the front will need spacers put on as there is a slight curve in the bumper.. needs a 20mm spacer each side and the middle of the plate will sit flush with the bumper... plates cannot be bend either.. slightly stressed..
2008 135i - Jet Black, Coral, full options Procede v4 *SOLD*
2009 123d - Space Grey, MSport 18"
2012 328i - Estoril Blue MSport 19", BBK + options
2015 M3 - Alpine White, HUD, Ext Leather