"After the failure, the crew capsule’s other backup systems will be put to the test. First, the capsule is equipped with small engines called retro-rockets that ignite when the vehicle is just a few feet above the ground. These rockets push against the Earth's surface, reducing the speed of the spacecraft. The capsule also has a "crushable structure" that can absorb some of the force of impact; the seats are designed to absorb energy, so that passengers feel as comfortable as possible during landing."
the above quote is from an article about a previous test where they deliberately disabled one of the three main chutes for the capsule to see if the mentioned retro-rockets could take up the slack. So, 16mph in a car does result in damage, but usually not irreparable damage, and usually not an injury to occupants. So, having to replace a crumple zone bumper on the capsule might be just ordinary post mission maint.
And the seats are force attenuating also, similar to helicopter seats, which have to attenuate I think 16gs or better.
