Volvo S40 Problems: 5 Issues Every Owner Should Know
2004-2012 model years · 4,280+ owner reports · Updated April 2026
According to Au7o's analysis of 4,280+ owner reports, the 2004-2012 Volvo S40 has 5 documented known issues, with 4 rated critical. The most serious are PCV System Failure Causing Oil Leaks and Engine Damage ($300-$1,500 repair), Electronic Throttle Module (ETM) Failure ($250-$800 repair), T5 Turbocharger Failure from Oil Starvation ($1,200-$3,500 repair) and Electric Power Steering Pump Failure ($400-$1,000 repair). The most commonly reported issue is PCV System Failure Causing Oil Leaks and Engine Damage with 2,200 owner reports. Across all issues, repair costs range from $100 to $3,500. DIY maintenance guides at au7o.io.