Service bulletins for the 2021 Toyota 4Runner
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
128 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Glass, wipers and mirrors are shown. Show all
| TSB005823 | 2023-10-16. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REFRIGERANT HOSES AND FITTINGS. TSB: The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. Follow the procedures outlined in this service bulletin to aid in locating, inspecting, and repairing refrigerant leaks |
|---|---|
| T-TT-0663-21 | 2021-10-25. Service bulletin. LANE DEPARTURE; VISIBILITY. TT: When used in conjunction with the Repair Manual, these Blind Spot Monitor, Forward Recognition Camera, and Front Millimeter Wave Radar tips leverage SSTs and readily available tools to support target placement in varying shop environments. |
| T-TT-0537-19_Rev | 2020-05-11. Service bulletin. VISIBILITY; LANE DEPARTURE. TT: The blind spot monitor (BSM) sensor angle inspection is used to confirm that the BSM sensor is within the specified angle before performing axis beam adjustment. When used in conjunction with the repair manual, these BSM tips leverage SSTs and readily available tools to support sensor angle confirmation in varying shop environments. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.