TSB: TOYOTA HIGHLANDER, RAV4, TUNDRA (2020–2022)

Bulletin T-SB-0021-23 — May 11, 2023

Bulletin Details

Bulletin IDT-SB-0021-23
ManufacturerTOYOTA
ModelsHIGHLANDER, RAV4, TUNDRA
Model Years2020–2022
Date IssuedMay 11, 2023
Date Added to NHTSAJune 26, 2023
ComponentELECTRICAL SYSTEM
Vehicles Affected14 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

TSB: Some 2020 ? 2022 model year Highlander and RAV4 vehicles, and 2022 model year Tundra vehicles equipped with a start/stop switch may exhibit water entry to the vehicle from the HVAC drain hose being disconnected from the air conditionin

Affected Vehicles

MakeModelYearComponent
TOYOTA HIGHLANDER 2022 110000 ELECTRICAL SYSTEM
TOYOTA HIGHLANDER 2022 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
TOYOTA RAV4 2022 110000 ELECTRICAL SYSTEM
TOYOTA RAV4 2022 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
TOYOTA TUNDRA 2022 110000 ELECTRICAL SYSTEM
TOYOTA TUNDRA 2022 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
TOYOTA HIGHLANDER 2021 110000 ELECTRICAL SYSTEM
TOYOTA HIGHLANDER 2021 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
TOYOTA RAV4 2021 110000 ELECTRICAL SYSTEM
TOYOTA RAV4 2021 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
TOYOTA HIGHLANDER 2020 110000 ELECTRICAL SYSTEM
TOYOTA HIGHLANDER 2020 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
TOYOTA RAV4 2020 110000 ELECTRICAL SYSTEM
TOYOTA RAV4 2020 138000 VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

Related TOYOTA Recalls

CampaignModelYearComponentSummary
TUNDRA 2024 ENGINE AND ENGINE COOLING:ENGINE:HARD... Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2024 T...
4RUNNER 2026 EQUIPMENT:OTHER:LABELS Gulf States Toyota, Inc. (GST) is recalling certain 2026 4Runner vehicles. Th...
RAV4 2025 SEATS:CRITICAL FASTENERS Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2025 R...
COROLLA CROSS HYBRID 2023 BACK OVER PREVENTION:WARNINGS:EXTERNA... Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2023-2...
COROLLA CROSS HYBRID 2024 BACK OVER PREVENTION:WARNINGS:EXTERNA... Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2023-2...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized TOYOTA dealer. Bring this bulletin ID (T-SB-0021-23) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.