It appears like the clearance in the window channel is just too tight to accommodate the window along with the thickness of the deflector.
I think you are right, that it is a flaw in the design, especially since both deflectors broke identically in the same spot.
Yep. I'm going to buy some sand paper or use a dremel to round out the sharp points where they chipped. I'm going to round off just the tip where it's now pointy at the tips of each semicircular crack. Enough of the lip remained where if I just round out the points they should still work like the driver side was functioning......... very well. If this fix works then when I get the replacements I will put them away and just have spares. If this fix doesn't work, then I will attempt to install the replacements without cracking them one last time before I request a refund. I will keep you all posted.
This mod is very practical and came in handy the first day I drove with them installed. I have been waiting for this mod for too long to just give up on it.
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