Early model Z3M interior rear view mirrors used a manual dim knob to adjust the tilt function. As the cars age these knobs either break completely or become so loose the knob continuously falls off.
As a side quest to the DBG high tuck stem mounts I wanted to solve this problem.
The original BMW knob/cam joint was mated with a 3mm square drive that shears off and is not offered as an individual part.
The DBG knob cam mates with a 5mm+ cross section hexagon drive increasing the cross sectional shear area over 2.5 times.
The knobs and cams are printed using PETG-CF filament and a 100% infill. This means they are completely solid parts and have tiny bits of carbon fiber infused into them for added shear resistance.
The fit between the two parts has a small rib that locks the knob onto the cam. After assembly they should not come back apart. They are designed as single install parts.
Price is $39 shipped (+tax) contiguous US. now through 11/24
You can order through PayPal check out by:
Clicking this LINK , or scanning the QR code.
Or using the contact form below
If not contiguous US (international or AK/HI) please use the contact form below.
Installation details are posted over here: Z3M mirror disassembly/reassembly DIY
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Double Bee Garage 
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