Component for a motor vehicle and associated motor vehicle. The component according to the invention has a first support layer (20) and a second support layer (22), partially applied on the first layer (20). The second layer (22) includes at least one first region (24A, 24B) applied on the first layer (20) and at least one second region (26A, 26B) positioned across from and separated from the first layer (20), the second region (26A, 26B) together with the first layer (20) delimiting an intermediated space (34A, 34B). The second region (26A, 26B) has a density lower than the density of the first region (24A, 24B). The second layer (22) comprises at least one third region (28A) applied on the first layer (20), the third region (28A) having a density lower than the density of the first region (24A, 24B).