Hi Everyone,
I have designed this round gear knob, originally designed for my BMW E36, but it should fit on most BMW's as they have the same gear knob latching/clipping system throughout their brands and ranges. Below is a short list of cars this should work on:(E24 E28 E30 E31 E32 E34 E36 E39 E46 Z3 Z4 E38 E39 E53 X5 X3 E60 E61 E81 E82 E87)
You can see as well in the wireframe the clips at the bottom of the gear knob and the horizontal tab at the top that fits into majority if not all the BMW gear shifters.
I would suggest to print this with decent wall count and infill, and almmost any material is poosible. The one in the picture is in PLA and has survived for many years in the African sun with minimal warping on the top where you can make out the infill pattern. Though if no warping is desired I would suggest to print this out of PETG or ABS.
There is also a version with the words MONA ontop of the gear shifter, inspired from the car from Fast and Furious Tokyo Drift