Covers, grilles, shrouds, and guards protect the parts underneath from debris, impact, and the occasional pallet corner. Sounds like cosmetic work, but it's really about what happens when they're missing — dust in places it shouldn't be, damage to components that were supposed to be shielded, sometimes safety issues.
This is the genuine Nilfisk Advance OEM COVER PLAST GREY F TANK 80L SI, part number 9100002421, brand new in the box. Factory-fit mounting points and clearances mean it goes on the same fasteners and sits flush the first time.
Not sure this is the right cover for your machine? Send us the model and serial and we'll confirm before you order.