BMW added passive safety and car-like crash testing to the scooter. It claimed that in a head-on collision, the C1 offered a standard of accident protection comparable to a European compact car. That was the prime marketing strategy to convert car buyers; the C1 was claimed to be so safe that the rider did not need to wear a helmet to ride it. This was achieved by using two shoulder-height roll bars, a crumple zone around the front wheel and an aluminium roll cage creating a car-like safety cell. It also had twin seatbelts reminiscent of an aviation style four-point harness to keep the rider in place.