Toyota 4RUNNER 2016–2019 — technical service bulletin
Bulletin T-SB-0012-19_Rev · NHTSA communication 10154805 · issued Feb 8, 2019
Technical service bulletin
communication type
Power Train
component
2016–2019
model years
4
vehicle entries
Official summary
TSB: REVISION NOTICE February 8, 2019 Rev1: ? The Warranty Information section has been updated. Any previous printed versions of this bulletin should be discarded. Some 2016 ? 2019 model year 4Runner 4WD vehicles may exhibit a cyclical groaning/grinding noise from the front differential in 2WD that is not present during 4WD operation. Follow the Repair Procedure in this bulletin to address this condition.
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.