Underbody Shield problems of the 2003 Hyundai Elantra

Thankfully no incident, my mechanic pointed out to me during normal maintenance on the car, the lower control arm had severe corrosion damage that its almost split he advised not to take it on the highway until it was fixed. He printed out the recall notice of the problems with the front lower control arm. Hyundai is giving me push back on taking care of it because im not in the salt belt. I am not in a salt free state they salt hear at the threat of flurries. That kind of damage is not normal wear and tear on a car that's under 60k miles. I don't want the world I just want them to fix the defective product, more important than that had my mechanic not pointed it out I could have put myself or others in danger if this snapped and I lost control of the passenger side wheel. I cant be the only one outside of the salt belt that is having this issue and may be in danger if it separates. Thank you for taking the time to listen.