A vehicular collision avoidance system includes a remote communicator disposed exterior and remote from the vehicle and operable to communicate information regarding location and motion of the remote communicator relative to the vehicle. A receiver at the vehicle receives a communication from the remote communicator, and a control at the vehicle includes a processor that processes information communicated by the remote communicator and received at the receiver. The control, responsive to processing communicated information, determines the location and motion of the remote communicator relative to the vehicle. A side sensing device is disposed at a side of the vehicle and operable to capture data, which is processed to determine approach of the remote communicator to the vehicle. Data captured by the side sensing device and information communicated by the remote communicator are processed at the control to determine a potential collision between the remote communicator and the vehicle.