Abstract: An external rearview mirror includes a holder for affixing the mirror to a motor vehicle. A carrier plate is located in a housing that is secured to the holder. At least one mirror assembly with a mirror pane is mounted pivotally on the carrier plate in the housing. At least one means of adjustment is mounted on the carrier plate and bound to the mirror assembly. A base plate is attached to the carrier plate, the base plate having a honeycomb structure with a multiplicity of cells on at least one side. The cells are integral and normal to the base plate and may vary in both height and diameter.