Deadly Wrecks is a small scripted mod for the seat belt. Unlike the trainer, it has an icon next to the radar (since version 1.1) and the player's own damage system (can be configured).
For example, the damage depends on the force of the car hitting an obstacle, as well as on which side the impact is from (front or side).
You can also select a key, by pressing which the mod will be activated. It will add even more realism and, most likely, will make staying in a car safer more than once. Especially for reviewers.