X250 air filter housing fix

X250 air filter housing woes

This is a standard lid fastening screw, on the right new on the left corroded and rounded out from the wrong type of screwdriver being used at some time.
The correct tool is a long reach PZ2 screwdriver NOT any shape or form of Philips!
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However the main problem is the fact that the screws used are completely inappropriate (not fit for purpose)
My own filter housing lid had one fixing snapped off completely out of frustration or complete inability to remove the fourth screw.
I found a seller offering a complete new housing with filter at £64.99 and took that option as the cheapest fix I could find.
My remedy for the standard screws was to replace them with self drilling roofing screws with M8 heads.
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I decided to not replace my existing lower filter housing as it means replacing the securing bands on the in and out hoses and nothing wrong with it either.
So I screwed each screw in by hand first in situ to cut the threads
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Should be no future problems
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