Holes drilled in plastic bottom engine bay cover.

iX35 again. After the Dealer 90000 km service I noticed the dealer had drilled 10 holes, about 8 mm diameter, equally spaced across the width of the plastic cover underneath the engine bay. If it was a
serious 4wd you,d call it the engine skid plate. I,ll ask dealer what its about next visit but anybody heard of this?
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Not familiar with the specific car model, but that does seem strange.....could it simply be for better screw access....to remove the panel? I did that on my old Elantra for similar reasons, it used to get in the way of the oil when draining so I had to remove it.
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