BMW 5 serie, E39
Source: RandallPhoto on Bimmerforums
In this Hella headlight the EvoX-R projector will be a direct replacement without any modifications. FX-R 3.0 is also a good option, but will need custom mounting. The 2003 headlight uses a different permasealing which is pretty hard to open.
Don’t forget to order Butyl rubber sealant to reseal the headlights after the retrofit!