Service bulletins for the 2021 Toyota Tundra
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.
134 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Heating and air conditioning 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 |
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| T-TT-0661-21 | 2021-09-13. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. TT: Customer complaint of HVAC compressor ?Bang? type noise upon initial compressor engagement when air conditioning has not been operated for an extended period (~24 hrs. or longer). The noise is caused by compressor oil collecting in the compressor and upon initial compressor engagement, the compressor must pump the oil out causing the ?Bang? noise. Compressor engagements thereafter are normal and less audible as the collected oil has been pumped out. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.