According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1960-1979 Volkswagen Bus has 7 documented known issues, with 4 rated critical. The most serious are #3 Cylinder Overheating and Dropped Valve Seats ($900-$6,000 repair), Inadequate Front Drum Brakes and Single-Circuit Master Cylinder ($600-$2,500 repair), Perished Rubber Fuel Lines and Engine-Bay Fire Risk ($60-$400 repair) and Structural Rust in Outriggers, Jacking Points, and Cab Floor ($1,500-$12,000 repair). Across all issues with published estimates, repair costs range from $60 to $12,000. DIY maintenance guides at au7o.io.