Grommet for a wire harness

The grommet (10) with axis Z comprises a funnel-shaped portion (12) having a flared end, a narrowed end and a conical wall with external and internal conical faces. The external conical face comprises an external circular groove (16) having a groove base (16c). The grommet (10) further comprises a tubular portion (11) extending outwardly from a circular joint section (25) formed at the narrowed end of the funnel-shaped portion (12). The grommet (10) is adapted to mount a wire harness for vehicles containing a water-trapping zone (A), and to be installed into a through-hole (H) formed in a body panel (P) of the vehicles. The funnel-shaped portion (12) comprises at least one means for improving the flexibility and space availability of the wire harness to be mounted, selected from the group consisting of an extended tubular portion (18) adapted to hold the water-trapping zone (A) of the wire harness, a structural configuration allowing the length along the axis Z of the funnel-shaped portion to be reduced and a plurality of funnel ribs having closely arranged first end sections (13a) that form a circular space (V) around the tubular portion (11).