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Service bulletins for the 2018 Toyota C-HR

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.

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

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
T-SB-0075-192025-08-08. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE:BODY. All VINs under ZKH are expired as of July 6, 2025 Some 2018 – 2019 model year C-HR vehicles may exhibit a condition where the door mirror foot light projects a distorted image of the C-HR logo onto the ground.
ZKH2025-08-08. Service campaign. ELECTRICAL SYSTEM; STRUCTURE:BODY. All VINs under ZKH are expired as of July 6, 2025 Toyota has received reports stating that the door mirror foot lights (puddle lights) may project a distorted image of the C-HR logo onto the ground. This distortion may be due to the projector film in the door mirror foot light becoming damaged due to heat and moisture. Although the door mirror foot light 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 coverage for repairs related to the condition described above.
T-SB-0057-182023-06-26. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. TSB: 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. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system.
T-TT-0687-222022-04-18. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: When customers have a concern about a discharged battery, no start, or general battery concern, the DCA-8000 is the only appropriate tool to use for diagnosis
T-TT-0578-19 Rev2020-11-23. Service bulletin. STEERING; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; 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-0553-19 Rev2020-08-24. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: The new DCA-8000 Diagnostic Charger may cause your facility?s Ground Fault Circuit Interrupter (GFCI) breaker to trip. A GFCI breaker can be tripped for various reasons, one of the reasons may be related to the DCA-8000. We are investigating this issue to determine the root cause. Other reasons the GFCI breaker may trip ?Circuit demand is too high for GFCI rating ?Worn out GFCI internal contacts ?Improper installation or wiring of GFCI breaker
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-0565-192019-09-16. Service bulletin. ELECTRICAL SYSTEM. TT: Vehicle with accessory installed fog lamps experiences low battery charge causing a hard or no start condition. A parasitic draw is observed between approximately 97 to 600 milliamps. Note: Parasitic draw should be less than 50 milliamps (0.050 amp). Testing may take anywhere from 10 minutes to 2 hours dependent upon which vehicle is being serviced and what equipment is installed in the vehicle.
T-TT-0553-192019-09-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. TT: The new DCA-8000 Diagnostic Charger may cause your facility?s Ground Fault Circuit Interrupter (GFCI) breaker to trip. A GFCI breaker can be tripped for various reasons, one of the reasons may be related to the DCA-8000. We are investigating this issue to determine the root cause. Other reasons the GFCI breaker may trip ? Circuit demand is too high for GFCI rating ? Worn out GFCI internal contacts ? Improper installation or wiring of GFCI breaker
T-SB-0134-16-Rev2019-09-03. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM; ENGINE. TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections have been updated. October 30, 2017 Rev1: ? Applicability has been updated to include 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0012-13. Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. 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 Techstream ECU flash reprogramming process and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the vehicle/ECU combination for which they are intended. ECUs have internal security that will not allow them to be programmed with another ECU?s information. NOTE ECU is a Toyota term used to describe integrated computerized devices responsible for managing the operation of a system or subsystem. For the purposes of this bulletin, the term ?ECU? is used as a generic label for the following SAE J1930 standard references: ? Powertrain Control Module (PCM) ? Engine Control Module (ECM) ? Transmission Control Module (TCM) ? Any other Toyota specific control unit
T-TT-0549-192019-07-15. Service bulletin. ELECTRICAL SYSTEM. TT: The new 12V Battery Warranty Testers (DSS-5000 & DCA-8000) require certain information to generate a test result and warranty code. Below is an explanation of what information is required when testing a 12V battery on the new Warranty Battery Testers.
T-SB-0229-12_Rev2018-04-23. Service bulletin. ELECTRICAL SYSTEM. TSB: REVISION NOTICE November 22, 2017 Rev1: ? Applicability has been updated to include 2014 ? 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. In the event that a Toyota vehicle becomes submerged in water, many components may be physically damaged. Electrical and electronic components, including wiring harnesses, are particularly susceptible to corrosion and subsequent malfunction. Although any flooding can be damaging, salt water flooding elevates the potential for abnormal conditions and may increase risks due to its highly corrosive and conductive nature. Salt residue also continues to corrode and remain conductive even after a vehicle dries. This bulletin is intended to assist with safe handling and inspection of flood damaged vehicles and to provide basic guidance on likely needed repairs.
T-TT-0464-172018-04-23. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: If the battery is disconnected incorrectly, the vehicle may exhibit a MIL ?ON? condition when restarted.
T-SB-0199-172018-04-02. Service bulletin. STRUCTURE; ELECTRICAL SYSTEM. TSB: Pre-Delivery Service (PDS) is a critical step in satisfying our new car customers. Customer feedback indicates the following areas deserve special attention when performing PDS: ? Careful inspection for paint chips/scratches and body dents/dings. ? Proper operation of electrical accessories (including interior light, clock, and radio reset). ? Interior cleanliness. ? Proper function of mechanical systems.
T-SB-0195-172018-04-02. Service bulletin. ELECTRICAL SYSTEM. TSB: A battery in a stored vehicle is subject to conditions that can reduce its performance and 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 discharges and/or failed batteries due to lack of maintenance. It is the dealer's responsibility to maintain the specific State-Of-Charge (SOC) of the vehicle's battery while in stock and assure proper SOC at delivery.
T-TT-0479-182018-03-12. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. TT: When encountering a distorted image with the foot (puddle) light please go to the repair manual link attached to repair the condition.
H0L_Dealer Lette2017-10-15. Service bulletin. ELECTRICAL SYSTEM; PARKING BRAKE. Dealer Letter: Momentary activation of the electronic parking brake (EPB) can occur in limited circumstances if the driver moves the shift lever from the drive position into the manual downshift position when a rigid object of a specific size is placed in the EPB switch finger well. Momentary activation while driving will result in the vehicle slowing slightly, warning lights appearing on the instrument panel, a ?PKB Applied? display message, and audible buzzing. Any authorized Toyota dealer will install a cover to reduce the size of the EPB switch opening.
H0L_Region Lette2017-10-15. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM. Region Letter: Momentary activation of the electronic parking brake (EPB) can occur in limited circumstances if the driver moves the shift lever from the drive position into the manual downshift position when a rigid object of a specific size is placed in the EPB switch finger well. Momentary activation while driving will result in the vehicle slowing slightly, warning lights appearing on the instrument panel, a ?PKB Applied? display message, and audible buzzing. Any authorized Toyota dealer will install a cover to reduce the size of the EPB switch opening.
H0L_Region Email2017-10-15. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Region Email: Momentary activation of the electronic parking brake (EPB) can occur in limited circumstances if the driver moves the shift lever from the drive position into the manual downshift position when a rigid object of a specific size is placed in the EPB switch finger well. Momentary activation while driving will result in the vehicle slowing slightly, warning lights appearing on the instrument panel, a ?PKB Applied? display message, and audible buzzing. Any authorized Toyota dealer will install a cover to reduce the size of the EPB switch opening.

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