A retention system on a mounting structure for a generally cylindrical component extending in a transversal axis. The retention system includes a generally U-shaped spring clip comprising a base and a pair of resilient retainer arms extending from the base along a longitudinal axis and defining an inlet passage; and a member holding said U-shaped spring clip; the retainer arms are adapted to engage with an upper side of the component in front of the inlet passage. The member includes one or multiple rigid retention walls extending inside the spring clip and which are adapted to engage with a lower side of the component at distance of the base, in working position.