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Service bulletins for the 2018 Toyota Prius C

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.

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

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Bulletins, newest first
T-TT-0520-192019-02-19. 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-0003-192019-02-19. Service bulletin. EQUIPMENT. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0234-17. ? The Introduction and Software Update Procedure sections have been updated. Service Bulletin No. T-SB-0234-17 is obsolete and any printed versions should be discarded.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
Toyota Safety Re2019-02-19. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
T-TT-0515-182019-02-19. Service bulletin. EQUIPMENT; FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERA; FORWARD COLLISION AVOIDANCE. TT: When adjusting the Forward Recognition Camera on vehicles with Toyota Safety Sense, it can be difficult to print the repair manual target to the proper size.
Lexus Safety Rec2019-01-07. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
Toyota Safety Re2019-01-07. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
Toyota Safety Re2019-01-07. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
Toyota Safety Re2019-01-07. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
TTT043217 Rev12018-12-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: Some Customers may complain about a Hybrid Vehicle Battery cooling system warning message. This warning message may appear when the HV Battery cooling system loses efficiency due to debris on the filter and or some object obstructing the air inlet.
TTT0432172018-12-17. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: Some Customers may complain about a Hybrid Vehicle Battery cooling system warning message. This warning message may appear when the HV Battery cooling system loses efficiency due to debris on the filter and or some object obstructing the air inlet.
Toyota Safety Re2018-12-17. Service bulletin. EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
T-TT-0493-182018-12-17. Service bulletin. SERVICE BRAKES. TT: Some 2016?2018 model year Prius vehicles may exhibit multiple conditions such as ABS MIL On, PCS/ICS/LDA/BSM Malfunction Message, Check Engine Light On, Skid Light On, Low Brake Force Message, and/or Brake Light Inoperative. Typically, more than one condition is present.
T-TT-0487-182018-12-17. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). TT: Some vehicles may experience a navigation inoperative condition in which only the compass and latitude/longitude coordinates are shown during PDI or after installing a replacement radio.
T-TT-0414-16-Rev2018-12-03. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT. 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-0503-182018-12-03. Service bulletin. LANE DEPARTURE: BLIND SPOT DETECTION. TT: When used in conjunction with the Repair Manual, these Blind Spot Monitor, Forward Recognition Camera, and Front Millimeter Wave Radar tips leverage SSTs and readily available tools to support target placement in varying shop environments.
T-TT-0503-182018-11-26. Service bulletin. LANE DEPARTURE: BLIND SPOT DETECTION. TT: When used in conjunction with the Repair Manual, these Blind Spot Monitor, Forward Recognition Camera, and Front Millimeter Wave Radar tips leverage SSTs and readily available tools to support target placement in varying shop environments.
T-SB-0313-172018-11-05. Service bulletin. SERVICE BRAKES. TSB: Some 2015 ? 2018 model year Toyota vehicles may exhibit brake vibration due to improper lug nut torque. Brake vibration can occur at any time if improper torque is applied to lug nuts. Even one lug nut over or under torqued can cause vibration.
L-SB-0015-18-Rev2018-10-22. Service bulletin. WHEELS. TSB: REVISION NOTICE June 26, 2018 Rev1: ? Applicability has been updated to include 2018 model year GS 300 and 2016 ? 2018 model year RC 300 vehicles. Any previous printed versions of this bulletin should be discarded. Some 2013 ? 2018 model year Lexus vehicles equipped with 2WD drivetrain and the F Sport package may exhibit a clicking noise from the front wheel area during a slow (parking lot) speed turn. Follow the Repair Procedure in this bulletin to address this condition. Refer to the video link below for an example of the clicking noise condition:
T-TT-0501-18-Rev2018-10-22. Service bulletin. EQUIPMENT:ELECTRICAL. TT: Some customers may experience a voice recognition inoperative condition or abnormal Entune? operation after performing an Entune? update.
Safety Recall an2018-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. Update on Technician Certification Requirements.
PG006-01-Obsolet2018-10-15. Service bulletin. EQUIPMENT:OTHER:LABELS; EQUIPMENT. Technical Service Bulletin: OBSOLETE NOTICE: July 31, 2018: This bulletin is now obsolete. Please see T-SB-0304-17.
PG004-97-Obsolet2018-10-15. Service bulletin. EQUIPMENT; EQUIPMENT:OTHER:LABELS. Technical Service Bulletin: OBSOLETE NOTICE: July 31, 2018: This bulletin is now obsolete. Please see T-SB-0304-17.
Toyota Safety Re2018-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements
T-TT-0503-18_Rev2018-10-15. Service bulletin. LANE DEPARTURE; VISIBILITY. TT: When used in conjunction with the Repair Manual, these Blind Spot Monitor, Forward Recognition Camera, and Front Millimeter Wave Radar tips leverage SSTs and readily available tools to support target placement in varying shop environments.
Technician Certi2018-10-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. Safety Recall and Service Campaign - Technician Certification Requirements

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