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-0019-23 | 2023-05-15. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). TSB: Some 2023 model year bZ4X vehicles may exhibit a condition in which the maintenance reminder messages (Figure 1) do not display on the multi-information display (MID) in the combination meter at scheduled maintenance intervals. The combination meter ECU has been updated to address this condition. |
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| T-TT-0727-23 | 2023-04-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: MIL On with DTC P2D384B (Hybrid/EV Battery Pack Heater Performance Over Temperature) |
| T-SB-0120-20 Rev | 2023-04-17. Service bulletin. STEERING. TSB: Some 2021 ? 2023 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software when the Electronic Control Unit (ECU) is replaced. Techstream software has been modified to indicate when configuration software is required. A new Configure column has been added to the Techstream Health Check Results screen to show when configuration software is available for a specific ECU. Follow the Operation Procedure in this bulletin to complete the ECU Software Configure Process. |
| T-SB-0012-23 | 2023-04-17. Service bulletin. BACK OVER PREVENTION; EXTERIOR LIGHTING. TSB: Some 2023 model year bZ4X vehicles with multimedia version 1505 or older; Corolla, Corolla Hybrid, and Corolla Hatchback vehicles with multimedia version 1506 or older; and Crown vehicles with multimedia version 1511 or older may exhibit one or more of the following conditions: ?Head unit rebooting. ?User Profile enhancements. ??Software Update Complete? pop-up message. ?Display screen frozen/non-responsive. ?Navigation items show on non-navigation multimedia system (Mexico market only). ?Newly added phone contact name will not show on display screen. ?Noise during hands-free calls. ?GPS location indicator stays on after map is off. ?Map does not display. ?Route guidance guides to incorrect side. ?App button(s) appear pressed. ?Sonar system display will not update on display screen. ?Back-up camera messages are in English instead of non-English. ?Incorrect HD radio icon color. ?Bluetooth profile version update. A software update is now available to address these conditions. Follow the Software Update Procedure in this bulletin to update the software. |
| T-TT-0709-22 Rev | 2023-01-17. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY; EQUIPMENT. TT: ?Some customers may be concerned that EV (Electric Vehicle) Battery charging performance does not meet their expectation. ?To extend the life of the EV Battery, some limitations may occur during EV battery charging ?This communication is a reference to the factors that can lead to charging limitations, as explained in the Owner?s Manual (Electric Vehicle System - Section 2.2) |
| 22TD05-Update | 2023-01-03. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE. TI: TECHNICAL INSTRUCTIONS FOR LIMITED-SERVICE CAMPAIGN 22TD05 Software Update for ?Car Finder? Feature CERTAIN 2023 Model Year bZ4X |
| 22TC11-bZ4X-Char | 2023-01-03. Service bulletin. ELECTRICAL SYSTEM. TI: TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 22TC11 SOFTWARE UPDATE ? DC COLD WEATHER CHARGING CERTAIN 2023 MODEL YEAR bZ4X |
| 22TC11-bZ4X | 2023-01-03. Service bulletin. ELECTRICAL SYSTEM. RL: A software update has been developed for certain 2023 model year bZ4X vehicles. Included in the update is an improvement of DC charging performance during low temperatures. |
| 22TC11-bZ4X-Deal | 2023-01-03. Service bulletin. ELECTRICAL SYSTEM. DP: A software update has been developed for certain 2023 model year bZ4X vehicles. Included in the update is an improvement of DC fast charging performance during low temperatures. |
| 22TD05-Remedy | 2023-01-03. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. RL: The Car Finder app, which is included with a Toyota One app subscription, operates the headlights to help locate the vehicle in a parking lot. Updated software is available to improve system operation. When the headlamp switch is off, the new software keeps the headlamps on for about 60 seconds unless prior to that you unlock or open the driver?s door or turn the ignition on. This update is available whether or not you currently have a subscription or decide to subscribe in the future. |
| 22TD05-Dealer | 2023-01-03. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS. DP: The Car Finder app, which is included with a Toyota One app subscription, operates the headlights to help locate the vehicle in a parking lot. Updated software is available to improve system operation. When the headlamp switch is off, the new software keeps the headlamps on for about 60 seconds unless prior to that you unlock or open the driver?s door or turn the ignition on. This update is available whether or not you currently have a subscription or decide to subscribe in the future. |
| 22TC09 | 2023-01-03. Service bulletin. EQUIPMENT:OTHER:LABELS. TI: TECHNICAL INSTRUCTIONS FORSPECIAL SERVICE CAMPAIGN 22TC09 bZ4X VIN VERIFICATION CERTAIN 2023 MODEL YEAR bZ4X VEHICLES |
| 22TC09-Remedy | 2023-01-03. Service bulletin. EQUIPMENT:OTHER:LABELS. RL: Toyota recently became aware that the make of the 2023 bZ4X may be mis-identified as ?Subaru? when the first eight digits of the vehicle?s VIN is decoded using the National Highway Traffic Safety Administration?s (NHTSA) database. We want to assure the customer that their vehicle is a genuine Toyota product, manufactured at Toyota?s Motomachi plant in Japan, and that their VIN is unique to their vehicle. |
| 22TC09-Dealer | 2023-01-03. Service bulletin. EQUIPMENT:OTHER:LABELS. DP: Toyota recently became aware that the make of the 2023 bZ4X may be mis-identified as ?Subaru? when the first eight digits of the vehicle?s VIN is decoded using the National Highway Traffic Safety Administration?s (NHTSA) database. We want to assure the customer that their vehicle is a genuine Toyota product, manufactured at Toyota?s Motomachi plant in Japan, and that their VIN is unique to their vehicle. |
| T-SB-0036-22 Rev | 2022-12-19. Service bulletin. EQUIPMENT. TSB: Long-term or off-site storage requires special care to keep vehicles factory fresh and ready for delivery. The following guidelines should be performed to minimize vehicle component/part degradation due to extended vehicle storage conditions. Long-term storage can affect a vehicle?s systems and components. Any problems that are found should be corrected immediately. |
| T-SB-0029-22 Rev | 2022-12-19. Service bulletin. AIR BAGS; EQUIPMENT ADAPTIVE/MOBILITY. TSB: 2023 model year Toyota vehicles are equipped with driver side floor mat retainers to secure the floor mat in the correct position. In addition, some models may also utilize retainers for passenger side and rear seat floor mats. During Pre-Delivery Service (PDS), follow the appropriate Installation Procedure to attach the driver side, and if applicable, the passenger side and rear seat floor mats to the vehicle carpet using the floor mat retainers. If installation instructions are included in the floor mat kit, place the instructions in the vehicle?s glove box for customer reference |
| 22TC09_Dealer Pa | 2022-12-19. Service bulletin. EQUIPMENT:OTHER:LABELS. DP: Toyota recently became aware that the make of the 2023 bZ4X may be mis-identified as ?Subaru? when the first eight digits of the vehicle?s VIN is decoded using the National Highway Traffic Safety Administration?s (NHTSA) database. We want to assure the customer that their vehicle is a genuine Toyota product, manufactured at Toyota?s Motomachi plant in Japan, and that their VIN is unique to their vehicle. |
| 22TD05_Dealer Pa | 2022-12-19. Service bulletin. VEHICLE SPEED CONTROL; SEAT BELTS; ELECTRICAL SYSTEM. DP: The Car Finder app, which is included with a Toyota One app subscription, operates the headlights to help locate the vehicle in a parking lot. Updated software is available to improve system operation. When the headlamp switch is off, the new software keeps the headlamps on for about 60 seconds unless prior to that you unlock or open the driver?s door or turn the ignition on. This update is available whether or not you currently have a subscription or decide to subscribe in the future |
| T-SB-0031-22 Obs | 2022-12-19. Service bulletin. COMMUNICATION. OBSOLETE NOTICE November 28, 2022: This bulletin is now obsolete. Please see T-SB-0105-22 |
| T-SB-0032-22 Obs | 2022-12-19. Service bulletin. COMMUNICATION. OBSOLETE NOTICE November 28, 2022: This bulletin is now obsolete. Please see T-SB-0104-22. |
| T-SB-0105-22 | 2022-12-19. Service bulletin. TRAILER HITCHES; WHEELS. TSB: During the manufacturing process, tires are mounted on the vehicle as matched sets to help reduce conditions such as pulling or drifting. If the wheels are replaced or refinished before vehicle delivery, it is important that the tires remain on the vehicle in the same location and in the same direction of rotation. Refer to the Tire Positioning Procedure in this bulletin to ensure that the original tires stay in the same location on the vehicle. |
| T-SB-0104-22 | 2022-12-19. Service bulletin. EQUIPMENT. TSB: A battery in a stored vehicle is subject to conditions that can reduce its performance and service life. These conditions include storage period, temperature, parasitic drain, and battery load. Because of these factors, battery inspection and maintenance are required in order to ensure proper operation and optimal battery life. As a matter of policy, Toyota does not provide battery warranty coverage for discharged and/or failed batteries due to lack of maintenance. It is the dealer?s responsibility to maintain the specified State-Of-Charge (SOC) of the vehicle?s battery while in stock and ensure proper SOC at delivery. To eliminate customer service concerns due to an undercharged battery during the first few weeks of ownership, ALL dealers should test the auxiliary (12V) battery and recharge, if necessary, no more than 48 hours before delivery to the customer |
| T-TT-0709-22 | 2022-10-24. Service bulletin. EQUIPMENT. TT: ?Some customers may be concerned that HV Battery charging performance does not meet their expectation. ?To extend the life of the HV Battery, some limitations may occur during HV battery charging ?This communication is a reference to the factors that can lead to charging limitations, as explained in the Owner?s Manual (Electric Vehicle System - Section 2.2) |
| T-SB-0032-22 Rev | 2022-10-17. Service bulletin. EQUIPMENT. TSB: A battery in a stored vehicle is subject to conditions that can reduce its performance and service life. These conditions include storage period, temperature, parasitic drain, and battery load. Because of these factors, battery inspection and maintenance are required in order to ensure proper operation and optimal battery life. As a matter of policy, Toyota does not provide battery warranty coverage for discharged and/or failed batteries due to lack of maintenance. It is the dealer?s responsibility to maintain the specified State-Of-Charge (SOC) of the vehicle?s battery while in stock and ensure proper SOC at delivery. To eliminate customer service concerns due to an undercharged battery during the first few weeks of ownership, ALL dealers should test the auxiliary (12V) battery and recharge, if necessary, no more than 48 hours before delivery to the customer. |
| TSB011120Rev1 | 2022-10-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). 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 replacement ECU requires an ECU security key. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.