The invention relates to a vehicle body structural part and an installation method thereof. The structural member comprises a body bottom with an outer wall, a fairing (22) with an application surface (24) and a plurality of connectors to connect the fairing (22) and the body bottom together. The outer wall with an anchor hole,At least one fastener (40) includes a sealable fastener mounted on the fairing (22) so that when the application surface (24) of the fairing is applied to the outer wall, the sealable fastener can be engaged through one of the anchor holes (40).Figure published with summary: Figure 3
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