This is work for 5 minutes with car jack, nothing special and price for new parts isnt expensive and this protection undercover is important.
Also 3x screw (round holes - front parts of cover) is security for front bumper, also important.
But i think your car have had an accident, is not possible this part break it.
You need this screw:
7x Hex head screw - ST 4,8X18 SW8 - OEM 07147129161
4x body nut - (maybe you know it like rapid, schnappmutter) - ST4,8-9-ZNS3 - OEM 07129904150
4x Hex head screw - ST4,8X19-U2 SW - OEM 07119904288
3x body nut - (maybe you know it like rapid, schnappmutter) ST 4,8-4-ZNS3 - OEM 07129904224