The steering wheel robot is an ordinary steering wheel of an SUV transformed into a creepy Transformer with spider-like limbs. It was given life when Sam Witwicky accidentally dropped the All Spark. It seems to like its owner and hugs her face. The steering wheel could appropriately be named Flywheel.
When Sam accidentally drops the Allspark momentarily, he touches a girl's car. She is immediately reactive and believes he scratched her car. Of course, this is forgotten instantly as the steering wheel of her car develops spider-like legs, wrenches itself free from the steering column and clamps itself onto the girl's face fully, hugging her head while she lets out muffled screams. It is unknown if the whole car was affected by the dropped Allspark or just the wheel alone; or whether or not the girl survived the face-hugging steering wheel or if it suffocated/brutally maimed her.