Mazda Mazda6 Problems: 8 Issues Every Owner Should Know
2003-2021 model years ยท 6,750+ owner reports ยท Updated April 2026
According to Au7o's analysis of 6,750+ owner reports, the 2003-2021 Mazda Mazda6 has 8 documented known issues, with 3 rated critical. The most serious are Subframe and Underbody Rust / Corrosion ($500-$3,000 repair), Variable Valve Timing (VVT) Actuator Failure ($400-$1,200 repair) and Front Lower Control Arm Ball Joint Premature Wear ($300-$800 repair). The most commonly reported issue is Subframe and Underbody Rust / Corrosion with 3,200 owner reports. Across all issues, repair costs range from $200 to $3,000. DIY maintenance guides at au7o.io.