An automotive lighting device , in particular for motorvehicles, comprising a body housing at least one lighting member therein, defining an optical axis (A) arranged in use parallel to the travel direction of the vehicle, delimited on the side of the inlet opening thereof, by a peripheral edge , a transparent lid arranged to close the inlet opening of the body , coupled with a peripheral edge thereof against the peripheral edge of the body , and a sealant bead arranged between the peripheral edges of lid and body to make them integral with each other; the body and the lid being shaped so that the lighting device as a whole and/or the body have, on at least two opposite sides thereof, a pair of abutting surfaces , arranged at least one on each side and parallel or perpendicular to the optical axis (A); wherein, in combination: i) - at said peripheral edge and, preferably, along the same, the body has a first weakening zone adapted to allow the peripheral edge with the corresponding peripheral edge of the lid integral therewith to be easily broken-off from the body ; ii) - at the peripheral edge thereof and, preferably, along the same, the lid has a second weakening zone adapted to allow the peripheral edge with the corresponding peripheral edge of the body integrally attached thereto to be easily broken-off from the lid ; iii) - at least the abutting surfaces of said pair of abutting surfaces are offset to each other; iv) - the lid is also shaped so as to have, at the peripheral edge thereof, on the side of two opposite faces thereof, a pair of opposite abutting surfaces offset with respect to each other, arranged at least one on each face ; characterized in that , v) - said peripheral edges of body and lid each have a flange-shaped portion which extends transversally to the optical axis (A) ; vi) - the flange-shaped portion of the body , in turn, externally and overhangingly carrying, radially outside the body , a duct-shaped portion for accommodating the sealant bead ; vii) - the flange-shaped portion of the lid , in turn, externally and overhangingly carrying, radially outside the body , a coupling portion with said duct-shaped portion ; viii)- said weakening zones being obtained so as to be aligned along an axis (B) parallel to the optical axis (A), arranged at each other in said flange-shaped portions , radially outside the body and the lid , respectively . i) - at said peripheral edge and, preferably, along the same, the body has a first weakening zone adapted to allow the peripheral edge with the corresponding peripheral edge of the lid integral therewith to be easily broken-off from the body ; ii) - at the peripheral edge thereof and, preferably, along the same, the lid has a second weakening zone adapted to allow the peripheral edge with the corresponding peripheral edge of the body integrally attached thereto to be easily broken-off from the lid ; iii) - at least the abutting surfaces of said pair of abutting surfaces are offset to each other; iv) - the lid is also shaped so as to have, at the peripheral edge thereof, on the side of two opposite faces thereof, a pair of opposite abutting surfaces offset with respect to each other, arranged at least one on each face ; characterized in that , v) - said peripheral edges of body and lid each have a flange-shaped portion which extends transversally to the optical axis (A) ; vi) - the flange-shaped portion of the body , in turn, externally and overhangingly carrying, radially outside the body , a duct-shaped portion for accommodating the sealant bead ; vii) - the flange-shaped portion of the lid , in turn, externally and overhangingly carrying, radially outside the body , a coupling portion with said duct-shaped portion ; viii)- said weakening zones being obtained so as to be aligned along an axis (B) parallel to the optical axis (A), arranged at each other in said flange-shaped portions , radially outside the body and the lid , respectively . <EOS>