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Service bulletins for the 2018 Toyota PRIUS

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.

223 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
T-TT-0516-18_Rev2020-06-22. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. TT: The microphone circuit passes through the DCM before reaching the radio/navigation system. To simplify the diagnosis of the microphone, Safety Connect SOS button lights, and DCM (Data Communication Module/telematics transceiver) inoperative conditions, refer to the procedure below to prevent unnecessary parts replacement.
T-TT-0537-19_Rev2020-05-11. Service bulletin. VISIBILITY; LANE DEPARTURE. TT: The blind spot monitor (BSM) sensor angle inspection is used to confirm that the BSM sensor is within the specified angle before performing axis beam adjustment. When used in conjunction with the repair manual, these BSM tips leverage SSTs and readily available tools to support sensor angle confirmation in varying shop environments.
T-TT-0583-19_Rev2020-05-11. Service bulletin. EQUIPMENT. TT: Some customers who have upgraded their iPhone® to iOS13 are experiencing a condition where the Bluetooth connection disconnects and reconnects. In some instances, this condition causes the Panasonic head unit to reboot when the Bluetooth connection is initiated.
T-SB-0304-17 Obs2020-05-11. Service bulletin. EQUIPMENT. TSB: OBSOLETE NOTICE April 07, 2020: This bulletin is now obsolete. Please see T-SB-0032-20. Replacement Certification Labels and VIN Plates
T-SB-0032-202020-05-11. Service bulletin. EQUIPMENT. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. PG021-88, PG015-89, PG0015-90, PG002-91, PG002-93, PG005-97, PG007-01, PG007-07, PG006-01, PG004-97, T-SB-0144-08, and T-SB-0304-17. The aforementioned bulletins are obsolete, and any printed versions should be discarded. Replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) (see Figure 1) for most 1979 ? 2020 model year vehicles may be available provided the requests meet the criteria listed in this Service Bulletin. Follow the Procurement Procedure in this bulletin to request a replacement certification label or VIN plate.
T-SB-0236-17 Obs2020-05-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. OBSOLETE NOTICE April 01, 2020: This bulletin is now obsolete. Please see T-SB-0031-20. Audio Head Unit Software Update (Denso)
T-SB-0031-202020-05-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0236-17. Service Bulletin No. T-SB-0236-17 is obsolete and any printed versions should be discarded. Audio Head Unit Software Update (Denso)
T-SB-0024-202020-04-13. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0003-19. ?The Introduction and Software Update Information sections have been updated. Service Bulletin No. T-SB-0003-19 is obsolete and any printed versions should be discarded. Some 2016 model year vehicles equipped with Entune? Audio (version UU.11.13), Entune? Audio Plus (version EU.20.21), or Entune? Premium Audio (CU.20.22) or older may exhibit one or more of the following conditions: ?Bluetooth® audio information is missing from instrument cluster MID ?Long street names are not indicated when using turn-by-turn directions ?Abnormal navigation routing ?Toyota Park Assist Settings button displays in the Settings menu ?System is unable to call phone numbers with ?-? present in the number ?System is unable to send SMS via the Quick Message feature ?Abnormal Bluetooth® audio playback when inserting and removing the iPhone® USB cable from the USB port ?System is unable to play audio from iPhone® connected via USB when two phones are connected via Bluetooth® at the same time ?Browse button operates intermittently in Bluetooth® audio ?Screen flickers when switching between day and night modes ?Abnormal Pandora Internet Radio operation when switching between two iPhones ?Unit reboots intermittently ?Diagnostic Trouble Code (DTC) U1110 or B15E6 is present ?Diagnostic screen displays intermittently ?Weather Map is inoperative ??Unable to connect to server? displays when using voice recognition and searching for ?IHOP? ?Panoramic view monitor operates abnormally
T-SB-0022-202020-04-13. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. TSB: Some 2016 ? 2020 model year Toyota vehicles may exhibit naturally occurring odors emitted from the HVAC system and/or related environmental factors. Follow the General Procedure in this bulletin to minimize the odors experienced.
T-TT-0600-202020-03-30. Service bulletin. EQUIPMENT:ELECTRICAL. TT: Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Free volume being too low. These settings may need to be reapplied any time the phone is paired to a new head unit, a phone update is applied, or the phone is un-paired and re-paired.
T-SB-0236-17_Rev2020-03-30. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. TSB: Some 2017 ? 2018 model year Prius Prime vehicles equipped with Premium Audio (R10A5430) or earlier may exhibit one or more of the following conditions. Updated multimedia software is now available to address these conditions. Follow the Multimedia Software Update Procedure in this bulletin to install the latest software version.?No iPod® connection when connecting via USB ?Intermittent rebooting when connecting/disconnecting the iPod® USB ?Intermittent error screen when connecting/disconnecting the iPod® USB ?Navigation screen is locked after ACC/ON ?Internet radio is inoperative after connecting/disconnecting the iPod® USB ?Screen flick operation updates ?Navigation voice guidance is intermittently in the wrong language ?Audio does not mute when using Siri® Eyes Free ?Hands-free call is disconnected when another call is received?Voice cannot be heard for several seconds on the handset after the navigation unit is turned off?Sound settings reset after ACC OFF/ON?Volume control intermittently inoperative?Unable to switch between audio modes?Ending video playback concerns?Intermittent rebooting?Unable to connect to an Apple® device via USB?Navigation map inoperative after software update?Navigation map does not display?Screen will not dim?Abnormal operation after using Siri® Eyes Free?Abnormal operation when using BT Audio?My Car Log does not show mileage?Flickering screen?CAN date/time shift?Intermittent sound from JBL equipped vehicles?Backup camera stays on?Abnormal noise when during ACC ON?Cannot change songs when playing PANDORA®?Intermittent black screen?Intermittent rebooting?Delay when using navigation?Intermittently Rebooting?Intermittent screen flashing?Intermittent screen going blank?Abnormal phone touch tone operation during Apple CarPlay® (if equipped)?Sound settings intermittently reset?Unable to switch audio modes
T-TT-0598-202020-03-30. Service bulletin. EQUIPMENT. TT: Some vehicles may experience a ?New software is not compatible with the system.? Pop-up while performing T-SB-0003-20 during the head unit software installation process
T-TT-0520-19_Rev2020-02-18. Service bulletin. EQUIPMENT. TT: In certain cases of leaking air conditioning systems, the root cause of the leak is inadvertently overlooked, causing a repeat repair. To improve customer satisfaction and repair A/C system leaks in one dealer visit, Toyota has developed a set of guidelines for evaluating A/C system components.
T-SB-0279-17_Obs2020-02-18. Service bulletin. EQUIPMENT. TSB: OBSOLETE NOTICE January 13, 2020: This bulletin is now obsolete. Please see T-SB-0003-20.
T-SB-0003-202020-02-18. Service bulletin. PARKING BRAKE; ELECTRICAL SYSTEM. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0279-17. ? The entire bulletin has been updated. Service Bulletin No. T-SB-0279-17 is obsolete and ANY printed versions should be discarded. Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio (version 01013E), Entune? Audio Plus (version 010156 or 01015C), or Entune? Premium Audio (versions 010171, 010170, or 01017D) may exhibit one or more of the following conditions: ? Head unit reboots at a specific location ? Abnormal Destination Search app operation ? Rebooting caused by no songs on the USB-connected iPhone ? A one-time reboot after ignition is cycled to ACC-ON ? Audio stays muted after the key is cycled. Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio (version 010144), Entune? Audio Plus (version 01015E), Entune? Premium Audio (version 010182), or earlier may exhibit one or more of the following conditions: ? Head unit reboots intermittently ? Half blank screen appears when on the maintenance screen and shifting to Reverse ? Screen freezes during an incoming phone call ? Incorrect time displays on the diagnostic menu ? Radio station information does not match radio station that is playing ? Abnormal playlist browsing operation ? Mute stays enabled after key cycle ? ?Search along my route? is inoperative ? Traffic data scales improperly ? Unit of measure is missing from distance to destination (showing ?11? instead of ?11mi?) ? MID compass does not match navigation screen when switching to North up ? Navigation does not match MID when switching from miles to kilometers ? Speed limit is blank on navigation screen ? Go button on VR screen is inoperative
T-SB-0008-202020-02-18. Service bulletin. EQUIPMENT. TSB: Vehicles may display evidence of a fluid leak or fluid seep from powertrain components. This bulletin explains how to determine the differences between a fluid leak versus a fluid seep. Cases that are determined to be a ?leak? should be repaired accordingly and will be covered under warranty if applicable. Cases that are determined to be a ?seep? should be documented on the repair order and inspected at the next service interval. Follow the Repair Information in this bulletin to determine if the concern in question is a fluid leak or fluid seep and review the Repair Procedure section to address the condition. NOTE This bulletin applies to ALL powertrain fluids excluding fuel and coolant.
T-TT-0583-192019-12-16. Service bulletin. EQUIPMENT:ELECTRICAL. TT: Some customers who have upgraded their iPhone® to iOS13 are experiencing a condition where the Bluetooth connection disconnects and reconnects. In some instances, this condition causes the Panasonic head unit to reboot when the Bluetooth connection is initiated.
T-TT-0442-17_Rev2019-12-16. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TT: Safety Connect is a vehicle option which requires a subscription fee for the system to be active after the initial trial period. Once the subscription has expired the DCM (Telematics Transceiver) will be in an inactive state. In some instances, a DCM may need to be replaced even though the customer is not using the service. If registration of the replacement DCM part is attempted using the Techstream utility after the account has become inactive, the registration will fail, and messages such as ?ATX webserver is Down? or ?ATX error? will be displayed.
T-SB-0149-192019-12-02. Service bulletin. BACK OVER PREVENTION. TSB: Some 2017 ? 2018 model year Prius Prime vehicles may exhibit corrosion on the back door sub-assembly steel reinforcement panel visible below the opener switch and rear camera. Follow the Repair Procedure in this bulletin to address this condition.
T-TT-0578-192019-12-02. Service bulletin. STEERING. TT: Some customers may encounter Bluetooth® connectivity concerns such as: ? Difficulty to pair the phone. ? Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ? Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as ability to change the track using the steering wheel controls. These concerns can be caused by changes made on the customer?s phone. Make sure to inquire with the customer if the connectivity concerns occurred after receiving an operating system update on their phone, or if they have restored their phone data/settings recently.
T-TT-0577-192019-12-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. TT: On 2016-2020 model year Prius and 2017-2020 model year Prius Prime vehicles follow the recommendations when performing the HVAC odor maintenance service using A/C Power Foam Evaporator Cleaner & Refresher.
T-SB-0241-17_Rev2019-11-18. Service bulletin. ENGINE; ELECTRICAL SYSTEM. TSB: REVISION NOTICE October 28, 2019 Rev1: ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. Some 2016 ? 2019 model year Prius vehicles equipped with a NiMH HV battery may exhibit one or both of the following conditions after repeated driving on long downhill slopes or while driving in high ambient temperatures, then turned off for approximately 1 ? 2 hours, and restarted: ? When accelerating from a stop or from extremely low speeds, the vehicle may have a reduction in power. ? The HV battery monitor on the multi-information display continually shows one bar, indicating that the battery State-Of-Charge (SOC) is at its lowest level. The Hybrid Control Computer (HV ECU) logic has been modified to reduce the possibility of these conditions. Follow the Repair Procedure in this bulletin to address these conditions condition.
T-TT-0576-192019-10-15. Service bulletin. ELECTRICAL SYSTEM. TT: Some Prius Prime customers may experience a MIL ON condition. Vehicles might be put into a failsafe mode and usage of battery will be discontinued. Technicians find DTC code P0ABF28 stored in the ECU.
T-SB-0135-192019-10-15. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING. TSB: Some 2016 ? 2019 model year Prius and 2017 ? 2019 model year Prius Prime vehicles may exhibit one or more of the following conditions due to a coolant leakage at the front exhaust pipe heat exchanger: ? Low coolant level ? MIL ON accompanied by Diagnostic Trouble Code (DTC) P148F00 ? Poor heater performance The front exhaust pipe with heat exchanger assembly has been updated. Follow the Repair Procedure in this bulletin to address this condition.
T-TT-0574-192019-10-15. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. TT: Some customers may experience poor outgoing Bluetooth sound quality, this can occur for various reasons. Current multimedia systems are designed with the ability to adjust Bluetooth sound quality to compensate for echo or excessive background noise.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.