On an i3, the door card is one of the more interesting components in the car. BMW made it not from the usual black plastic but from natural fibre — pressed hemp and kenaf, visible as texture in the surface. Add wool in the seat fabric and leather tanned with olive leaf extract. In 2013 that was not marketing; it was part of the brief.
Which has a practical consequence for used parts: natural-fibre trim cannot be re-dyed or pushed back into shape the way plastic can. A damaged card gets replaced rather than refurbished — which is why these parts are sought after, and why the condition in the photographs is the whole story.
The rest of the car is no less unusual: a carbon-fibre-reinforced passenger cell on an aluminium chassis, a bolted-on plastic skin, and rear doors hinged at the back that will only open once the front door is out of the way. There is no B-pillar in the usual sense.
