TSB: TOYOTA 86, BZ4X, COROLLA, MIRAI, RAV4 PRIME, SIENNA, SIENNA HYBRID, TUNDRA, TUNDRA HYBRID, VENZA, VENZA HYBRID (2021–2023)

Bulletin TSB011120Rev1 — July 8, 2022

Bulletin Details

Bulletin IDTSB011120Rev1
ManufacturerTOYOTA
Models86, BZ4X, COROLLA, MIRAI, RAV4 PRIME, SIENNA, SIENNA HYBRID, TUNDRA, TUNDRA HYBRID, VENZA, VENZA HYBRID
Model Years2021–2023
Date IssuedJuly 8, 2022
Date Added to NHTSAOctober 17, 2022
ComponentENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
Vehicles Affected18 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: When certain vehicle ECUs are replaced, the ECU security key must be written in order for that ECU to communicate on the vehicle network. The Techstream Software Health Check Results screen has been enhanced to help identify if a repla

Affected Vehicles

MakeModelYearComponent
TOYOTA BZ4X 2023 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA 86 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA COROLLA 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA MIRAI 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA RAV4 PRIME 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA SIENNA 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA SIENNA HYBRID 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA TUNDRA 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA TUNDRA HYBRID 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA VENZA 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA VENZA HYBRID 2022 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA MIRAI 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA RAV4 PRIME 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA SIENNA 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA SIENNA HYBRID 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA TUNDRA 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA VENZA 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
TOYOTA VENZA HYBRID 2021 061600 ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)

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 (TSB011120Rev1) 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.