While reversing over the kerb I managed to trash the under engine tray. A lot of the screw fixing plates have gone or no longer secure the screws. They are very difficult to get at to replace. Should I live without the tray or are there alternative ways of fixing the tray under the engine?

My octavia is held together with cable ties as the screws and clips they go into rusted away. I drilled some small holes in tray and where it joins other plastic. I just snip them off if I have to remove it and replace. In fact all my cars ended up like that at some point. Never given me any bother,

Alasdair

If it is the snap in plate nuts that secure the rear on the undercover - the 3 that is snapped into the "Assembly carrier" - ie the front subframe, I can give you the part number for them, I can't remember where I found the part number as the parts listings doesn't seem to list these bits, but I will have it written down somewhere as I bought a set of 3 new ones as at least one of the ones on my wife's 2015 Polo had rusted out badly and so was not gripping the screw for the undercover.

The other ones on the plastic parts are just U shaped plate washers which are listed in the parts listing on line, I think that it was just Febi ones that I bought via ebay.