Here is a good look at the 2017 Jeep Renegade Body Structure. Look at the image below and then follow up with the crash test images. This will give you an idea one reason stronger steel in found throughout vehicles.
Here is a good look at the 2017 Jeep Renegade Body Structure. The hinge pillar and part of the rocker panel are made with press hardened steel (PHS). Automakers are using strong steels like PHS in different areas of the body structure. One area that we need to be aware of is the hinge pillar and the outer firewall/first fender reinforcement. The reason is the small overlap frontal test that the Insurance Institute for Highway Safety (IIHS) runs on vehicles.