Service bulletins for the 2023 Toyota bZ4X
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.
162 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| T-SB-0043-26 | 2026-09-09. Service bulletin. SUSPENSION. Some 2023 – 2025 model year bZ4X vehicles may exhibit a creaking noise coming from the strut mounting bearing of the front suspension when turning. A new part has been developed to address this condition. |
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| 26TH01 | 2026-02-11. Other. EXTERIOR LIGHTING. Toyota is conducting a noncompliance equipment recall involving certain Rear Combination Lamp service parts for Toyota bZ4X sold from December 2023 to November 2025 in the U.S. Approximately 80 service parts are involved in this recall. The subject rear combination lamp service parts were sold in the U.S. even though they were intended for an overseas market. These parts do not meet a federal safety standard because they have a side marker reflector instead of a side marker lamp. In the absence of light reflecting off the reflector, this can reduce the ability of other road users to identify the rear of the vehicle from the side, potentially increasing the risk of a crash. |
| T-SB-0055-24 Rev2 | 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. |
| 25TD03 | 2025-12-05. Service campaign. UNKNOWN OR OTHER. Model Year 2023-2025 bZ4X vehicles have charge ports that use the CCS standard. This program is for lessees and owners of these vehicles to receive 1 complimentary NACS Charging Adapter per vehicle to enable charging at stations using the NACS standard. |
| 25TC03 | 2025-08-08. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS. TECHNICAL INSTRUCTIONS FOR 25TC03 REPROGRAMMING FOR FORWARD RECOGNITION CAMERA CERTAIN 2023 COROLLA CROSS 2023 COROLLA CROSS HV 2023 Bz4x |
| T-TT-0784-25 Rev1 | 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 | 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 | 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. |
| 25TC03 | 2025-06-06. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS. TECHNICAL INSTRUCTIONS FOR 25TC03 REPROGRAMMING FOR FORWARD RECOGNITION CAMERA CERTAIN 2023 COROLLA CROSS 2023 COROLLA CROSS HV 2023 BZ4X |
| 25TC03 | 2025-06-06. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Frequently Asked Questions SPECIAL SERVICE CAMPAIGN 25TC03 Certain 2023 Model Year Corolla Cross Certain 2023 Model Year Corolla Cross HV Certain 2023 Model Year bZ4x Certain 2021-2023 Model Year Sienna HV TSS 3.0 Forward Recognition Camera Software Update |
| 25TC03 | 2025-06-06. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Included vehicles are equipped with Toyota Safety Sense (TSS) 3.0, which includes the Pre-Collision System (PCS), which uses the forward recognition camera. In rare cases, a software programming issue can damage the forward recognition camera. This will result in the Pre-Collision System not working the next time the car is started. |
| 25TC03 | 2025-06-06. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS. TECHNICAL INSTRUCTIONS FOR 25TC03 REPROGRAMMING FOR FORWARD RECOGNITION CAMERA CERTAIN 2023 COROLLA CROSS 2023 COROLLA CROSS HV 2023 BZ4X |
| 25TC03 | 2025-06-06. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Frequently Asked Questions SPECIAL SERVICE CAMPAIGN 25TC03 Certain 2023 Model Year Corolla Cross Certain 2023 Model Year Corolla Cross HV Certain 2023 Model Year bZ4x Certain 2021-2023 Model Year Sienna HV TSS 3.0 Forward Recognition Camera Software Update |
| 25TC03 | 2025-06-06. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Included vehicles are equipped with Toyota Safety Sense (TSS) 3.0, which includes the Pre-Collision System (PCS), which uses the forward recognition camera. In rare cases, a software programming issue can damage the forward recognition camera. This will result in the Pre-Collision System not working the next time the car is started. |
| T-TT-0779-25 | 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. |
| 25TC03 | 2025-05-15. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS. TECHNICAL INSTRUCTIONS FOR 25TC03 REPROGRAMMING FOR FORWARD RECOGNITION CAMERA CERTAIN 2023 COROLLA CROSS 2023 COROLLA CROSS HV 2023 BZ4X |
| 25TC03 | 2025-05-15. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Frequently Asked Questions SPECIAL SERVICE CAMPAIGN 25TC03 Certain 2023 Model Year Corolla Cross Certain 2023 Model Year Corolla Cross HV Certain 2023 Model Year bZ4x Certain 2021-2023 Model Year Sienna HV TSS 3.0 Forward Recognition Camera Software Update |
| 25TC03 | 2025-05-15. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Included vehicles are equipped with Toyota Safety Sense (TSS) 3.0, which includes the Pre-Collision System (PCS), which uses the forward recognition camera. In rare cases, a software programming issue can damage the forward recognition camera. This will result in the Pre-Collision System not working the next time the car is started. |
| 25TC03 | 2025-05-15. Service bulletin. FORWARD COLLISION AVOIDANCE: WARNINGS. TECHNICAL INSTRUCTIONS FOR 25TC03 REPROGRAMMING FOR FORWARD RECOGNITION CAMERA CERTAIN 2023 COROLLA CROSS 2023 COROLLA CROSS HV 2023 BZ4X |
| 25TC03 | 2025-05-15. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Frequently Asked Questions SPECIAL SERVICE CAMPAIGN 25TC03 Certain 2023 Model Year Corolla Cross Certain 2023 Model Year Corolla Cross HV Certain 2023 Model Year bZ4x Certain 2021-2023 Model Year Sienna HV TSS 3.0 Forward Recognition Camera Software Update |
| 25TC03 | 2025-05-15. Service campaign. FORWARD COLLISION AVOIDANCE: WARNINGS. Included vehicles are equipped with Toyota Safety Sense (TSS) 3.0, which includes the Pre-Collision System (PCS), which uses the forward recognition camera. In rare cases, a software programming issue can damage the forward recognition camera. This will result in the Pre-Collision System not working the next time the car is started. |
| T-TT-0779-25 | 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 | 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 | 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 | 2025-03-25. Service bulletin. ENGINE. OBSOLETE NOTICE February 11, 2025: This bulletin is now obsolete. Please see T-SB-0021-25. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.