F06/F12/F13 - What are the various body panels construction materials made of?

[RichardP]

I've not be able to find a definitive answer to the question of what the various body panels of the M6 are made of. Out of interest I went round with a magnet and fond that only the main shell is steel, the rest is non magnetic.

Obviously the roof is carbon fibre, the front and rear bumpers are some sort of plastic, probably a short fibre reinforced injection moulded ABS. But what about the doors, bonnet (hood), boot (trunk) and front wings? Are they Aluminium or some type of plastic?

[wzj519]

Front and rear bumpers are made by plastics are for safety purposes.
All other parts are made of Aluminium, otherwise, 6 series will not be this kind of heavy.

[RichardP]

I just found this which I thought was quite interesting.

2.1. Body shell construction
The material mix in the F06 corresponds to the greatest possible extent to the F13. The four doors with frameless side windows and the engine hood are made from aluminium. Also a high content of light alloy is used for the construction of the axle and the engines. The front spring supports are made of die-cast aluminium, the front fenders are plastic and the luggage compartment lid is made from glass fiber composite material. The use of high-strength multiphase steels and hot-formed, high strength steels is credited for the maximum strength and optimized weight of the passenger safety cell.

F06 Body shell construction materials
Index Explanation
1 Multi-phase steels (> 300 MPa)
2 Hot-formed steels (> 900 MPa)
3 Aluminium
4 Other steels (< 300 MPa)
5 Plastics