Toyota Avalon Hybrid 2018–2024 — technical service bulletin
Bulletin 26TF01 · NHTSA communication 11037184 · issued Aug 11, 2026
Technical service bulletin
communication type
Fuel/propulsion System
component
2018–2024
model years
11
vehicle entries
Official summary
Under certain conditions, debris can accumulate inside the fuel cap causing potential fuel vapor leaks that can cause increased evaporative emissions to exceed the regulated limits. This issue will not trigger the M.I.L. (Malfunction Indicator Lamp)
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.