The embodiments described and claimed herein are improved wheelchair passenger securement systems and stations. In particular, one embodiment described and claimed herein is a drop-in system comprising a barrier module and a wall-side module, which incorporate two separate restraint devices which are configured to secure a wheelchair at two separate attachment points and a bumper. The system can optionally include a moveable excursion barrier or a pull-mechanism to pre-tension at least one of the restraint devices the wheelchair securements.In a simpler embodiment, a bumper and two restraint devices, such as retractors, are provided for attachment to the vehicle surfaces or structures at a wall side of a wheelchair securement area or at a rear side of the wheelchair securement area.