2002 Toyota Sienna Problems: 3 Known Issues
2002 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2002 Toyota Sienna has 3 documented known issues, with 2 rated critical. The most serious are U140E/U140F 4-Speed Automatic Slipping, Flare, and No-Movement from Valve Body Wear ($1,400-$3,800 repair) and 1MZ-FE 3.0L V6 Oil Gelling (Engine Sludge) from PCV/Oil-Return Restriction ($900-$5,500 repair). Across all issues with published estimates, repair costs range from $180 to $5,500. DIY maintenance guides at au7o.io.