# Service bulletins for the 2023 Toyota Corolla

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.

141 bulletins from NHTSA, as of 2026-10-19.

- [T\-SB\-0110\-20 Rev2](/bulletins/11037202.md), 2026-09-09, Service bulletin: ENGINE. OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T\-SB\-0051\-26.
- [T\-SB\-0104\-21 Rev2](/bulletins/11029896.md), 2026-03-07, Service bulletin: ENGINE. OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete.
- [T\-SB\-0055\-24 Rev2](/bulletins/11028712.md), 2026-02-11, Service bulletin: UNKNOWN OR OTHER. Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Service Bulletin is to provide general guidelines and procedures for odor remediation. This Service Bulletin provides a guide on how to prepare and treat the interior of the vehicle for odor remediation. Refer to the applicable model and model year Repair Manual and the EPA \(Environmental Protection Agency\) website for the most up\-to\-date safety and precautionary guidelines.
- [23TD01](/bulletins/11028709.md), 2026-02-11, Service bulletin: STRUCTURE:BODY. 23TD01 Expired on December 31, 2025 TECHNICAL INSTRUCTIONS FOR LIMITED SERVICE CAMPAIGN 23TD01 LICENSE PLATE BRACKET CLIPS INTERFERE WITH LOWER GRILLE ASSEMBLY 2023 COROLLA HATCHBACK
- [23TD01](/bulletins/11028708.md), 2026-02-11, Service campaign: STRUCTURE:BODY. 23TD01 Expired on December 31, 2025 The front license plate bracket provided with the vehicle has clips that potentially interfere with the lower grille assembly. This interference can make it more difficult to install the front license plate bracket
- [25R001](/bulletins/11024093.md), 2025-10-08, Other: UNKNOWN OR OTHER. SERVICE CAMPAIGN RENOTIFICATION OWNER RENOTIFICATION 25R001
- [T\-SB\-0088\-23 Rev2](/bulletins/11022961.md), 2025-09-09, Service bulletin: ENGINE. OBSOLETE NOTICE August 19, 2025: This bulletin is now obsolete. Please see T\-SB\-0059\-25.
- [T\-SB\-0059\-25](/bulletins/11022958.md), 2025-09-09, Service bulletin: ENGINE. Some 2020 – 2025 model year Corolla vehicles may exhibit a vibration or rattle noise from the right\-hand engine mounting insulator sub\-assembly. This condition will usually go away when the engine’s Revolutions Per Minute \(RPM\) are above idle. This condition is typically found on vehicles in warm climates/weather. No Diagnostic Trouble Codes \(DTCs\) are associated with this condition. This condition does not affect the operation of the vehicle.
- [T\-SB\-0010\-24 Rev2](/bulletins/11020670.md), 2025-07-10, Service bulletin: ELECTRICAL SYSTEM. Some 2021 – 2022 model year Avalon, 2018 – 2024 Camry, 2019 – 2025 model year Corolla, 2022 – 2025 model year Corolla Cross, and 2019 – 2025 model year RAV4 vehicles with A25A\-FKS and M20A\-FKS engines may have a MIL ON condition with one or more of the following Diagnostic Trouble Codes \(DTCs\) upon cold soak start up with engine coolant temperatures between 14°F – 41°F: •P030027 – Random/Multiple Cylinder Misfire Detected \(Emission\) Signal Rate of Change Above Threshold •P030000 – Random/Multiple Cylinder Misfire Detected •P030100 – Cylinder 1 Misfire Detected •P030200 – Cylinder 2 Misfire Detected •P030300 – Cylinder 3 Misfire Detected •P030400 – Cylinder 4 Misfire Detected
- [T\-TT\-0784\-25 Rev1](/bulletins/11020664.md), 2025-07-10, Service bulletin: ENGINE. Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.
- [T\-TT\-0784\-25](/bulletins/11020658.md), 2025-07-10, Service bulletin: ENGINE. Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.
- [T\-SB\-0058\-23 Rev1](/bulletins/11020657.md), 2025-07-10, Service campaign: ELECTRICAL SYSTEM. The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.
- [T\-TT\-0779\-25](/bulletins/11019331.md), 2025-06-06, Service bulletin: ELECTRICAL SYSTEM. To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.
- [T\-TT\-0779\-25](/bulletins/11018328.md), 2025-05-15, Service bulletin: ELECTRICAL SYSTEM. To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.
- [T\-SB\-0021\-25](/bulletins/11016782.md), 2025-04-08, Service bulletin: ENGINE. Flash reprogramming allows the Electronic Control Unit \(ECU\) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field\-fix procedures described in individual Service Bulletins. This bulletin details the Global Techstream\+ \(GTS\+\) ECU flash reprogramming procedures and outlines use of the Technical Information System \(TIS\) and the Calibration Update Wizard\+ \(CUW\+\). To ensure the correct ECU software is installed, ECUs will require a Security Signature before the ECU will initialize the flash reprogramming sequence. This bulletin also details the process for acquiring a Security Signature from TIS during the GTS\+ ECU flash reprogramming process.
- [T\-SB\-0013\-24 Rev1](/bulletins/11016781.md), 2025-04-08, Service bulletin: ELECTRICAL SYSTEM. The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused.
- [T\-SB\-0107\-20 Rev2](/bulletins/11015882.md), 2025-03-25, Service bulletin: ENGINE. OBSOLETE NOTICE February 11, 2025: This bulletin is now obsolete. Please see T\-SB\-0021\-25.
- [T\-SB\-0029\-25](/bulletins/11015879.md), 2025-03-25, Service bulletin: STRUCTURE:BODY. Some 2023 – 2024 model year Corolla vehicles may exhibit a rattling noise condition from the forward recognition camera cover. The forward recognition camera covers have been modified to address this condition.
- [T\-SB\-0021\-25](/bulletins/11015496.md), 2025-03-11, Service bulletin: ENGINE. Flash reprogramming allows the Electronic Control Unit \(ECU\) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field\-fix procedures described in individual Service Bulletins. This bulletin details the Global Techstream\+ \(GTS\+\) ECU flash reprogramming procedures and outlines use of the Technical Information System \(TIS\) and the Calibration Update Wizard\+ \(CUW\+\). To ensure the correct ECU software is installed, ECUs will require a Security Signature before the ECU will initialize the flash reprogramming sequence. This bulletin also details the process for acquiring a Security Signature from TIS during the GTS\+ ECU flash reprogramming process.
- [T\-SB\-0013\-24 Rev1](/bulletins/11015495.md), 2025-03-11, Service bulletin: ELECTRICAL SYSTEM. The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused.
- [24TC08](/bulletins/11014215.md), 2025-02-12, Service bulletin: ENGINE. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 24TC08 TI ver. 2 FUEL TANK FILLER CLAMP AND VAPOR LEAK DETECTION CERTAIN 2023 MODEL YEAR PRIUS PRIME
- [24TC08](/bulletins/11014214.md), 2025-02-12, Service bulletin: ENGINE. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 24TC08 TI ver. 1 FUEL TANK FILLER CLAMP AND VAPOR LEAK DETECTION CERTAIN 2023\-2024 MODEL YEAR Corolla HV CERTAIN 2023 MODEL YEAR PRIUS
- [24TC08](/bulletins/11014213.md), 2025-02-12, Service campaign: ENGINE. In the subject vehicles, the vapor leak detection monitor system may not detect a vapor leak from the fuel filler cap and illuminate the malfunction indicator lamp \(MIL\).
- [24TC08](/bulletins/11014212.md), 2025-02-12, Service campaign: ENGINE. In the subject vehicles, the vapor leak detection monitor system may not detect a vapor leak from the fuel filler cap and illuminate the malfunction indicator lamp \(MIL\).
- [T\-SB\-0120\-20 Rev2](/bulletins/11014211.md), 2025-02-12, Service bulletin: ELECTRICAL SYSTEM. OBSOLETE NOTICE January 30, 2025: This bulletin is now obsolete. Please see T\-SB\-0015\-25.

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