AUTOMOTIVE LIGHTING AND/OR SIGNALING DEVICE AND ASSEMBLY METHOD THEREOF

A lighting and signaling device (4), in particular for the automotive sector, comprising: - a container body (8) delimiting a containment housing (12) closed by a lenticular body (20), which accommodates at least one first light source (24) and is closed by a lenticular body (20), a first light guide (28) configured to receive as input at least partially the light beam produced by said at least one first light source (24), transmit it by total internal reflection along a first prevailing propagation direction (Xl-Xl) and send it as output from the lenticular body (20), - at least one fixing and/or screen element (32), opaque to said light beam, associated with the first light guide (28) at a first interface wall (36), and fixed either directly or indirectly onto the container body (8) to mechanically block the first light guide (28) onto the container body (8), wherein the first light guide (28) is mechanically fixed to the fixing and/or screen element (32) by means of at least one first welding portion (40) which projects from the first interface wall (36).