According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2001 Hyundai Elantra has 13 documented known issues, with 3 rated critical. The most serious are Front Lower Control Arm Corrosion and Possible Separation, Timing Belt Neglect Leading to Bent Valves and No-Start ($700-$2,500 repair) and Front Coil Spring Fracture and Tire Damage ($500-$1,200 repair). Across all issues with published estimates, repair costs range from $50 to $2,500. DIY maintenance guides at au7o.io.