A mudguard strip adapted to cover a wheel arch of a motor vehicle delimited, on the one hand, by a portion of a first bodywork element towards the front of the vehicle and, on the other hand, by a portion of a second bodywork element towards the rear of the vehicle, said portions being of arc-of-circle shapes, coaxial and in the extension of one another in the longitudinal direction of the vehicle, said mudguard rabbet being substantially in the shape of an arc of a circle, with a radius of curvature corresponding substantially to the radius of curvature of the wheel arch, said rebate comprising, in an area intended to cover the wheel arch at the junction between the respective portions of the first bodywork element and of the second bodywork element which delimit the wheel arch: - a cut in the form of a transverse slit extending from an outer edge of the mudguard towards the inside of the mudguard and adapted to allow deformation of the mudguard during installation of the mudguard, and: a bowl-shaped arrangement adjacent to the transverse slot in the longitudinal direction of the vehicle, projecting towards the center of the mudguard in order to provide a recessed space on the top of the mudguard which is adapted to escape respective parts (11, 21) of the first bodywork element and/or of the second bodywork element, and/or fasteners (50, 51) for fastening together said first and second bodywork elements, said bowl being closed in all directions except towards the top of the mudguard and except towards the outside of the passage wheel. said mudguard rabbet being substantially in the shape of an arc of a circle, with a radius of curvature corresponding substantially to the radius of curvature of the wheel arch, said rebate comprising, in an area intended to cover the wheel arch at the junction between the respective portions of the first bodywork element and of the second bodywork element which delimit the wheel arch: - a cut in the form of a transverse slit extending from an outer edge of the mudguard towards the inside of the mudguard and adapted to allow deformation of the mudguard during installation of the mudguard, and: a bowl-shaped arrangement adjacent to the transverse slot in the longitudinal direction of the vehicle, projecting towards the center of the mudguard in order to provide a recessed space on the top of the mudguard which is adapted to escape respective parts (11, 21) of the first bodywork element and/or of the second bodywork element, and/or fasteners (50, 51) for fastening together said first and second bodywork elements, said bowl being closed in all directions except towards the top of the mudguard and except towards the outside of the passage wheel. - a cut in the form of a transverse slit extending from an outer edge of the mudguard towards the inside of the mudguard and adapted to allow deformation of the mudguard during installation of the mudguard, and: a bowl-shaped arrangement adjacent to the transverse slot in the longitudinal direction of the vehicle, projecting towards the center of the mudguard in order to provide a recessed space on the top of the mudguard which is adapted to escape respective parts (11, 21) of the first bodywork element and/or of the second bodywork element, and/or fasteners (50, 51) for fastening together said first and second bodywork elements, said bowl being closed in all directions except towards the top of the mudguard and except towards the outside of the passage wheel.