NHTSA Complaint #11522000 — 2018 JEEP WRANGLER

There is a missing weld on the lower passenger rear control arm bracket that looks like a manufacture defect. I recently started hearing a clanging noise and brought it to the mechanic. I was not put at risk of safety (for the tie being). The problem has been confirmed and looked at ONLY by a mechanic. There were no warning lights. How do i get the welding fixed? the dealer will not help me repair it.