Per I-CAR curriculum: "Hoods typically have crush zones in the underside panels to cause them to fold during a collision, preventing hood intrusion into the passenger compartment.

Another repair or replace consideration is whether or not the crush zones can be repaired without affecting the:

• integrity of the part. Crush zones must initiate folding during a frontal impact.
• durability of the part. The hood must retain the proper shape for the life of the repair."