2023 Toyota Highlander Technical Service Bulletins

130 technical service bulletins (TSBs) are on record for the 2023 Toyota Highlander. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11034823Jun 25, 2026Body and structure. Some 2020 – 2026 model year Highlander and Highlander Hybrid vehicles may exhibit a water leak from the roof rack attachment clips. This may be caused by the sealant in the roof channel obstructing the proper seating position for the clip gasket.
• 11031158Mar 18, 2026Electrical system. Some 2020 – 2024 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the air conditioner does not cool due to a leak and/or corrosion in the rear underbody air conditioner tube and accessory assembly. The anti-corrosion material has been updated to reduce the possibility of this condition.
• 11028712Jan 7, 2026Other or unknown. 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…
• 11026318Nov 18, 2025Body and structure. Some 2020 – 2023 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the Power Back Door (PBD) will not open or close and/or stops moving while opening or closing. A modified PBD unit assembly is available to address these conditions.
• 11026306Nov 7, 2025Electrical system. A new head unit software update is available for 2022 – 2025 model year Tundra, and Tundra Hybrid; 2023 – 2025 model year Corolla Cross, Corolla Cross Hybrid, Highlander, Highlander Hybrid, Mirai, and Sequoia Hybrid vehicles equipped with Toyota Multimedia versions earlier than version 2230.
• 11024080Sep 17, 2025Electrical system. Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator.
• 11024075Sep 9, 2025Electrical system. A new head unit software update is available for 2023 model year Corolla Cross, Corolla Cross Hybrid, Highlander, Highlander Hybrid, and Mirai vehicles equipped with Toyota Multimedia (earlier than version 2170). This software update includes the following improvements: •User Profile. •User interface. •Cloud navigation. •Intelligent assistant voice recognition. •Bug fixes.
• 11020657Jun 13, 2025Electrical 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.
• 11019331Apr 2, 2025Electrical 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.
• 11018328Apr 2, 2025Electrical 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.
• 11016781Feb 10, 2025Electrical 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.
• 11015495Feb 10, 2025Electrical 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.
• 10249327Dec 19, 2024Other or unknown, Engine cooling. TT: Engine Oil Leak between the Lower Oil Pan and Crank Case
• 11012759Dec 12, 2024Electrical system. Some 2022 – 2024 model year Tundra and 2023 model year Highlander vehicles may exhibit a MIL ON condition with Diagnostic Trouble Codes (DTCs) P162B87 (Lost Communication with Battery Monitor Module Missing Message) and/or P15AD87 (Active Grille Air Shutter "A" Missing) present. The battery state sensor assembly has been updated to prevent the condition from occurring.
• 11012744Dec 6, 2024Body and structure. The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and remain on a painted vehicle surface, especially the horizonal areas of the hood, roof, and decklid, significant damage can occur. This damage is the result of actual etching of the paint and appears as…
• 11012743Dec 6, 2024Body and structure. To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from weather elements and initial rust before the vehicle is delivered to the customer. Consequently, the film should remain on the wheel for as long as possible.
• 11012742Dec 6, 2024Body and structure. Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If these acidic compounds settle on an exposed vehicle, especially the horizontal areas such as the hood, roof, and decklid, significant damage to the painted surfaces can occur. Acid rain damage can typically be identified on vehicles by the presence of stains on the paint surface…
• 11012735Dec 5, 2024Body and structure. Toyota vehicles are currently protected with RapgardTM protective film designed to protect the horizontal painted surfaces. This material protects from acid rain, environmental fallout, and rail contamination. Follow the Removal Procedure in this bulletin to remove the RapgardTM protective film within 90 days from initial application.
• 11012727Dec 3, 2024Body and structure. Vehicles may occasionally be subjected to contamination by airborne iron particles shed from railroad tracks, train wheels, exposure to heavy machinery facilities, grinding, welding, etc. This type of contamination can be identified by the presence of small, red or brown particles on the paint surface. These particles are often difficult to see on dark color paints but can be easily felt when brushing a hand across…
• 11010361Oct 24, 2024Other or unknown. The table below describes the phases currently planned for the Second Key Delivery Program and the estimated timing of announcement. This table will be updated during each phase launch and as more details become available.
• 11010360Oct 24, 2024Other or unknown. SECOND KEY DELIVERY PROGRAM 23TJ01 Multiple Models and Model Years Second Key Delivery Program Frequently Asked Questions
• 11010359Oct 24, 2024Other or unknown. The supply of Smart Keys available for Toyota vehicles has been temporarily limited to one (1) on select models since October 2022 due to global semiconductor shortages impacting certain microchips. Affected vehicles have been delivered with only one Smart Key and a second mechanical key.
• 11010358Oct 24, 2024Other or unknown. The subject vehicles were delivered with only one (1) Smart Key on select models since October 2022 due to a global semiconductor shortage impacting certain microchips. The affected vehicles were delivered with one (1) Smart Key and a second mechanical key.
• 11010351Oct 18, 2024Body and structure. Some 2022 model year Avalon and Avalon Hybrid, 2022 – 2024 model year Camry, Camry Hybrid, Corolla, Corolla Hatchback, Corolla Hybrid, Highlander, Highlander Hybrid, Prius, Prius Prime, RAV4, RAV4 Hybrid, RAV4 Prime, and Venza Hybrid, 2023 – 2024 model year Crown, and 2024 model year Grand Highlander vehicles may exhibit a high-pitched noise coming from the front HVAC blower motor while operating the air…
• 11010336Oct 10, 2024Electrical system. Technical instructions for special service campaign 24tc05 malfunction indicator lamp (mil) is on with dtc p05ce00 software update certain 2023 & 2024 highlander vehicles certain 2024 grand highlander vehicles
• 11010334Oct 8, 2024Electrical system. Some 2022 – 2024 model year Tundra and 2023 model year Highlander vehicles may exhibit a MIL ON condition with Diagnostic Trouble Codes (DTCs) P162B87 (Lost Communication with Battery Monitor Module Missing Message) and/or P15AD87 (Active Grille Air Shutter "A" Missing) present. The battery state sensor assembly has been updated to prevent the condition from occurring.
• 11010326Oct 1, 2024Electrical system. Some 2023 model year RAV4 Prime vehicles with Data Communication Module (DCM) firmware version earlier than LG-N210hh1V1V-09 may exhibit a condition in which the remote climate system is inoperative after the vehicle has been off for three hours or more.
• 11010105Sep 25, 2024Other or unknown. The table below describes the phases currently planned for the Second Key Delivery Program and the estimated timing of announcement. This table will be updated during each phase launch and as more details become available.
• 11010104Sep 25, 2024Other or unknown. SECOND KEY DELIVERY PROGRAM Frequently Asked Questions
• 11010103Sep 25, 2024Other or unknown. The subject vehicles were delivered with only one (1) Smart Key on select models since October 2022 due to a global semiconductor shortage impacting certain microchips. The affected vehicles were delivered with one (1) Smart Key and a second mechanical key.
• 11010087Sep 19, 2024Engine, Electrical system. The Engine Control Computer software has a programing error which can cause the exhaust variable valve timing (VVT) locking pin to temporarily get stuck. When this happens, an engine malfunction indicator lamp (MIL) can appear on the dashboard as well as diagnostic trouble code (DTC), P05CE00 to be set.
• 11010086Sep 19, 2024Engine, Electrical system. SPECIAL SERVICE CAMPAIGN 24TC05 Frequently Asked Questions
• 11010076Sep 18, 2024Engine, Electrical system. Technical instructions for special service campaign 24tc05 malfunction indicator lamp (mil) is on with dtc p05ce00 software update certain 2023 & 2024 highlander vehicles certain 2024 grand highlander vehicles
• 11010075Sep 18, 2024Electrical system, Engine. The Engine Control Computer software has a programing error which can cause the exhaust variable valve timing (VVT) locking pin to temporarily get stuck. When this happens, an engine malfunction indicator lamp (MIL) can appear on the dashboard as well as diagnostic trouble code (DTC), P05CE00 to be set.
• 11010074Sep 17, 2024Electrical system, Engine. The Engine Control Computer software has a programing error which can cause the exhaust variable valve timing (VVT) locking pin to temporarily get stuck. When this happens, an engine malfunction indicator lamp (MIL) can appear on the dashboard as well as diagnostic trouble code (DTC), P05CE00 to be set.
• 11010073Sep 17, 2024Engine, Electrical system. Frequently Asked Questions Original Publication Date: September 19, 2024
• 11010068Sep 17, 2024Other or unknown. The table describes the phases currently planned for the Second Key Delivery Program and the estimated timing of announcement. This table will be updated during each phase launch and as more details become available.
• 11010067Sep 17, 2024Other or unknown. The subject vehicles were delivered with only one (1) Smart Key on select models since October 2022 due to a global semiconductor shortage impacting certain microchips. The affected vehicles were delivered with one (1) Smart Key and a second mechanical key.
• 11010059Sep 3, 2024Body and structure. Some customers have expressed concern that the wireless functions of their Key Fob stop working. Key Fob LEDs will not turn ON, but engine starts with key held up against start button. Key battery voltage is confirmed OK and no DTC/RoB is found. This condition may occur if customer places Key Fob near wireless charger while phone is charging. When the key battery is removed and reinstalled, the Key Fob begins to…
• 11007455Jul 29, 2024Body and structure. Some 2005 – 2024 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…
• 11006161Jul 29, 2024Body and structure. Some 2005 – 2024 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…
• 11007454Jul 18, 2024Electrical system. OBSOLETE NOTICE July 18, 2024: This bulletin is now obsolete. Please see T-SB-0062-24.
• 11007453Jul 18, 2024Electrical system. Some 2023 model year RAV4 Prime vehicles with Data Communication Module (DCM) firmware version earlier than LG-N210hh1V1V-09 may exhibit a condition in which the remote climate system is inoperative after the vehicle has been off for three hours or more.
• 11006160Jul 18, 2024Electrical system. OBSOLETE NOTICE July 18, 2024: This bulletin is now obsolete. Please see T-SB-0062-24.
• 11006159Jul 18, 2024Electrical system. Some 2023 model year RAV4 Prime vehicles with Data Communication Module (DCM) firmware version earlier than LG-N210hh1V1V-09 may exhibit a condition in which the remote climate system is inoperative after the vehicle has been off for three hours or more.
• 11007445Jul 12, 2024Body and structure. The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and remain on a painted vehicle surface, especially the horizonal areas of the hood, roof, and decklid, significant damage can occur. This damage is the result of actual etching of the paint and appears as…
• 11007444Jul 12, 2024Body and structure. To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from weather elements and initial rust before the vehicle is delivered to the customer. Consequently, the film should remain on the wheel for as long as possible.
• 11007443Jul 12, 2024Body and structure. Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If these acidic compounds settle on an exposed vehicle, especially the horizontal areas such as the hood, roof, and decklid, significant damage to the painted surfaces can occur. Acid rain damage can typically be identified on vehicles by the presence of stains on the paint surface…
• 11006151Jul 12, 2024Body and structure. The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and remain on a painted vehicle surface, especially the horizonal areas of the hood, roof, and decklid, significant damage can occur. This damage is the result of actual etching of the paint and appears as…
• 11006150Jul 12, 2024Body and structure. To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from weather elements and initial rust before the vehicle is delivered to the customer. Consequently, the film should remain on the wheel for as long as possible.

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