Toyota 4RUNNER 2019–2020 — technical service bulletin
Bulletin T-TT-0602-20 Rev · NHTSA communication 10177589 · issued Jun 9, 2020
Technical service bulletin
communication type
Suspension
component
2019–2020
model years
2
vehicle entries
Official summary
TT: Some 2019-2020 model year 4Runner SR5 and TRD Off Road grade models with Dunlop Grandtrek AT20 P265/70R17 tires may experience vibration (flutter) in the steering wheel when driving at highway speeds 55 mph and above.
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.