2021 Mazda MAZDA3 Technical Service Bulletins

634 technical service bulletins (TSBs) are on record for the 2021 Mazda MAZDA3. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10191535Apr 30, 2021Engine cooling. Some vehicles may have the check engine light on with DTC P0524:00 or P055F:00 stored in memory. Contamination in the engine oil may cause the engine oil solenoid valve to become stuck, resulting in improper operation of the oil pump and improper oil pressure. DTC P0524:00 (Engine oil pressure too low), DTC P055F:00 (Engine oil pressure malfunction). The control software of the PCM has been modified to eliminate…
• 10191534Apr 30, 2021Engine cooling. Some vehicle may exhibit a tapping noise from the engine during idling; etc., and synchronized to the engine rpm. The tapping noise may be caused by the switchable hydraulic lash adjuster (HLA), which may not work properly due to air bubbles accumulated in the oil passage in it. To eliminate this concern, the switchable HLA has been modified for increased oil supply to reduce air bubbles in the oil passage.
• 10191539Apr 27, 2021Electrical system. IMPORTANT NOTE: Some 2020 Mazda3 vehicles may have incorrect infotainment software version 10042 installed. The incorrect software will cause MyMazda App Connected Vehicle enrollment errors. Go to SSPC1. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App Connected Vehicle enrollment (and Software Update Error message on…
• 10191537Apr 27, 2021Equipment. Some customers may complain about the following symptoms occurring when driving without anything ahead (no metallic object reflects the radar wave such as a vehicle ahead, an oncoming vehicle, a road sign or a guard rail). While using Mazda Radar Cruise Control (MRCC), the MRCC cancels by itself. When MRCC is not in use, Safety and Driver Support Systems Temporarily Disabled. Front Radar Obscured.
• 10191536Apr 27, 2021Electrical system. Some customers may experience all of following symptoms: The door lock/unlock operation will not work using the remote transmitter button. The door lock/unlock operation will not work using the door lock/release touch sensor. The engine will not start using the ignition switch. This is caused when excess load is applied to the remote transmitter and the electrical terminals in it may be deformed, causing poor…
• 10191538Apr 26, 2021Equipment. APPLE CARPLAY / ANDRID AURO FREQUENTLY ASKED QUESTIONS (FAQ) The following vehicles are not equipped with Apple CarPlay™ / Android Auto™, but it can be activated using MDARS. See Activation instructions on MGSS -> Infotainment -> MAZDA CONNECT Updates -> Apple Carplay / Android Auto MDARS Activation Instructions
• 10190969Apr 21, 2021Forward collision avoidance. If driving on roads with few vehicles or obstructions ahead for the front radar sensor to detect, and a Safety and Driver Support Systems Temporarily Disabled. Front Radar Obscured. Drive Safely message is temporarily displayed, this does not necessarily indicate a problem. The radar sensor may simply need to be cleaned to eliminate the warning message.
• 10190972Apr 14, 2021Equipment. MAZDA CONNECTED SERVICES - FREQUENTLY ASKED QUESTIONS (FAQ): Index: General Questions, Setup and Getting Started, Registration / Enrollment, WI-FI General Information, WI-FI How-To, WI-FI Trial Period, Interacting With The App, Service Issues, Troubleshooting, Reception Level Inspection, Dealer Processes, Conditions for Remote Engine Start Will Not Function, Conditions for Remote Engine Start Function Will turn…
• 10190953Apr 12, 2021Transmission and drivetrain. Some vehicles may exhibit that the active air shutter is working, but DTC P05A0:00 (Active air shutter: Opening angle abnormality (sticking)) is stored in memory. This is caused by improper control software of the PCM detecting the DTC immediately without performing the failsafe operation. When the active air shutter detects unusual torque, it is designed to repeat the open/close cycles up to three times as a…
• 10190970Apr 7, 2021Equipment. Some customers may complain about an infotainment reboot and the infotainment system recovers if the Navigation SD card is removed (see attached video). NOTE: This concern may be present on a 2019-2020 Mazda3 or a 2020 CX-30 after the customer updates the Navigation SD card map software using Mazda Toolbox.
• 10190968Apr 7, 2021Equipment. MAZDA CONNECT Symptom Troubleshooting (7th Generation Vehicles). Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure
• 10190967Apr 2, 2021Visibility (wipers, defrost, mirrors). When the power windows are operated many times without being fully closed, small errors of the window position sensor may accumulate and cause improper operation of the jam-safe function. To reduce the risk of this occurrence, the AUTO function is disabled if the power window is operated 10 consecutive times without being fully closed (turning the ignition OFF and then ON does not reset the counting).
• 10190958Apr 2, 2021Equipment. Some customers may notice an unexpected collision warning or automatic braking while reversing. This concern may be due to the parking assist unit software. The Smart Brake Support (SBS-R) system may be detecting an unintended obstruction at the lower rear end of the vehicle. To eliminate this concern, the parking assist unit control software has been modified.
• 10189858Mar 23, 2021Equipment. Some customers may complaint about an infotainment reboot. The infotainment system recovers if the Navigation SD card is removed (see attached video).
• 10189954Mar 16, 2021Body and structure, Equipment. DRW38 - RESIDUE OR STAIN BY WRAPGUARD ON BELTLINE - On the subject vehicles shipped from MC on January 8, 2021, added wrap guard was temporarily attached on the beltline molding (both left and right) to protect the beltline molding from misty seawater (for rust prevention). The wrap guard was to be removed prior to shipment. The affected vehicles need to have the wrap guard removed and then inspect the beltline…
• 10189947Mar 16, 2021Electrical system, Transmission and drivetrain, Equipment, Exterior lighting. Some customers may complain about any of the following: Warning light, Warning message, Headlight(s) inoperative, Cannot shift out of Park, Many DTC's stored, Module communication errors
• 10189951Mar 15, 2021Equipment. IMPORTANT NOTE: Some 2020 Mazda3 vehicles may have incorrect infotainment software version 10042 installed. The incorrect software will cause MyMazda App Connected Vehicle enrollment errors. Go to SSPC1. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App, Connected Vehicle enrollment (and Software Update Error message on…
• 10189950Mar 15, 2021Engine cooling, Equipment. MAZDA CONNECTED SERVICES - FREQUENTLY ASKED QUESTIONS (FAQ): Index: General Questions, Setup and Getting Started, Registration / Enrollment, WI-FI General Information, WI-FI How-To, WI-FI Trial Period, Interacting With The App, Service Issues, Troubleshooting, Reception Level Inspection, Dealer Processes, Conditions for Remote Engine Start Will Not Function, Conditions for Remote Engine Start Function Will turn…
• 10189797Mar 15, 2021Electrical system. If you encounter any type of electrical concern (e.g, dead battery, engine no start, DTC(s) stored...), interview the customer before proceeding with normal Workshop Manual diagnosis. Aftermarket devices may be the cause of the electrical concern. Ask the customer if any aftermarket devices have been installed.
• 10189854Mar 11, 2021Electrical system. Some vehicles may have a "Low Battery Risk. Start Vehicle to Charge 12V Battery" warning message in the instrument cluster and a 30 second alarm sound. This is caused by the vehicle's electrical control area network (CAN) entering "Sleep Mode" when the network awake time reaches 30 cumulative minutes without the engine running.
• 10189946Mar 8, 2021Electrical system, Visibility (wipers, defrost, mirrors), Equipment. When performing the MGSS Workshop Manual 360° View Monitor System Aiming Procedure, M-MDS may show error message "Procedure unsuccessful". This may be caused by light glare on the SST.
• 10189871Mar 8, 2021Electrical system. Key Transmitter Power Saving Function: When the key transmitter Power Saving Function is turned ON, transmitter battery power consumption is restricted, thereby extending the transmitter battery life.
• 10188101Feb 22, 2021Latches, locks and linkages, Engine cooling, Equipment, Electrical system. Mazda Motor Corporation has decided to conduct a Special Service Program impacting certain 2019-2021 Mazda3 and 2020-2021 CX-30 vehicles built at MC and MMVO. Please see the descriptions, models, years, and VIN Ranges below. NOTE: A new MDRT Tool will be sent to all dealers, please read the attached MDRT Tool document arriving with this email.
• 10188031Feb 22, 2021Equipment, Engine cooling. MAZDA CONNECTED SERVICES - FREQUENTLY ASKED QUESTIONS (FAQ): Index: General Questions, Setup and Getting Started, Registration / Enrollment, WI-FI General Information, WI-FI How-To, WI-FI Trial Period, Interacting With The App, Service Issues, Troubleshooting, Reception Level Inspection, Dealer Processes, Conditions for Remote Engine Start Will Not Function, Conditions for Remote Engine Start Function Will turn…
• 10188029Feb 22, 2021Latches, locks and linkages, Equipment, Exterior lighting. IMPORTANT NOTE: Some 2020 Mazda3 vehicles may have incorrect infotainment software version 10042 installed. The incorrect software will cause MyMazda App Connected Vehicle enrollment errors. Go to SSPC1. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App, Connected Vehicle enrollment (and Software Update Error message on…
• 10188032Feb 10, 2021Electrical system. Some vehicles may have a "Low Battery Risk. Start Vehicle to Charge 12V Battery" warning message in the instrument cluster and a 30 second alarm sound. This is caused by the vehicle's electrical control area network (CAN) entering "Sleep Mode" when the network awake time reaches 30 cumulative minutes without the engine running.
• 10188016Feb 8, 2021Electrical system. This service bulletin provides testing and charging procedures in order to promote proper battery maintenance, to deliver new vehicles with fully charged batteries, and to reduce unnecessary battery replacement cost. For new vehicles in stock at the dealer, inspect and maintain the battery periodically according to the repair procedure.
• 10188015Feb 8, 2021Electrical system. The Mazda DCA-8000PM is required for all warranty battery testing. If the Mazda DCA-8000PM is not used, incorrect battery testing may result in unnecessary battery replacement. Use the following test procedures in this Service Bulletin to test Mazda vehicle batteries and to generate a Warranty Code.
• 10188030Feb 2, 2021Equipment, Engine cooling. MAZDA CONNECTED SERVICES - FREQUENTLY ASKED QUESTIONS (FAQ): Index: General Questions, Setup and Getting Started, Registration / Enrollment, WI-FI General Information, WI-FI How-To, WI-FI Trial Period, Interacting With The App, Service Issues, Troubleshooting, Reception Level Inspection, Dealer Processes, Conditions for Remote Engine Start Will Not Function, Conditions for Remote Engine Start Function Will turn…
• 10188028Feb 2, 2021Latches, locks and linkages, Engine cooling, Exterior lighting. IMPORTANT NOTE: Some 2020 Mazda3 vehicles may have incorrect infotainment software version 10042 installed. The incorrect software will cause MyMazda App Connected Vehicle enrollment errors. Go to SSPC1. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App, Connected Vehicle enrollment (and Software Update Error message on…
• 10188027Feb 2, 2021Equipment. Some customers may complaint about an infotainment reboot. The infotainment system recovers if the Navigation SD card is removed (see attached video). Mazda is currently investigating this concern. Contact Hotine for the latest information.
• 10186813Jan 29, 2021Equipment. Section 6 of the Wireless Charging Pad instructions call for the use of an "ultrasonic cutter" to cut a rectangular hole for the harness to pass through and to serve as an access point to pop the wireless charger base out should service be required. Since an "ultrasonic cutter" is not readily available, follow the Repair Procedure to cut the rectangular hole.
• 10186812Jan 29, 2021Lane departure, Equipment. Some vehicles may experience M-MDS (MDARS) showing the front radar dynamic aiming is incomplete. This may be caused by: Faulty front radar sensor software logic (MDARS showing the front radar dynamic aiming is incomplete although the procedure is completed). Front radar sensor out of alignment due to vehicle accident.
• 10186701Jan 26, 2021Equipment. A musty/mildew type odor may come from the vents when the air conditioning (A/C) system is operating. It is most noticeable when the A/C is first turned ON. This odor is the result of mold growth in the A/C evaporator/cooling unit which is caused by condensation, dust, and pollen within the cooling unit. This condition is usually worse during high humidity conditions. “Mazda Air Cooling Coil Coating” is…
• 10186699Jan 26, 2021Steering. Some customers may complain that the steering wheel is off center more than 3° even when driving straight on a flat road.
• 10186706Jan 25, 2021Body and structure. Some customers may complain about water in the trunk compartment after a car wash or heavy rain. This may be caused by insufficient sealing performance of the trunk lid weatherstrip because the lip of the weatherstrip leans towards the inside of the trunk compartment (improper design). To correct this concern, the shape of the trunk lid weatherstrip has been modified.
• 10186705Jan 21, 2021Body and structure. Some vehicles may experience stains appearing on the hood, roof and/or trunk of the vehicle. This concern is most likely to be found in a cold weather areas just after the RAPGARD is removed at PDI. This may be caused by moisture which has been trapped and condensed between the paint and the RAPGARD. These types of stains can be removed with a heat gun or an infrared drier.
• 10186704Jan 21, 2021Body and structure. When encountering a vehicle with paint damage, refer to the "Mazda Paint Warranty Guide" to determine cause, prevention, remedy, and warranty coverage (if applicable).
• 10186698Jan 21, 2021Wheels. Some automotive cleaning products contain strong acid or alkali. When these types of cleaners are used to clean the wheels on Mazda vehicles, the chemicals contents penetrate the clear coating of the wheel surface and damage the paint under the clear coating. The damaged area has the appearance of dark stains.
• 10186693Jan 21, 2021Steering, Transmission and drivetrain, Wheels, Engine cooling. Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers.
• 10186808Jan 20, 2021Body and structure. The purpose of this Service Alert is to remind dealers to keep the protective films on the piano black door garnishes attached until just before delivering the vehicle to the customer. The protective films are attached on new vehicles when shipped from the factory in order to avoid being scratched during transportation and while in dealer stock.
• 10186807Jan 19, 2021Brakes, Other or unknown, Equipment. Some vehicles may have a "Low Battery Risk. Start Vehicle to Charge 12V Battery" warning message in the instrument cluster and a 30 second alarm sound. This may be caused by the customer doing any one of the following several times without starting the engine for an extended period of time: Open any door(s), Unlock doors, Open liftgate, Depress brake pedal, Push start/stop button. No dealer visit is required.
• 10186806Jan 19, 2021Equipment, Electrical system. When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated. CAUTION: If TCU activation is not performed, connected vehicle functions will not operate. This will have a negative impact on the customer because they will need to return to…
• 10186805Jan 15, 2021Vehicle speed control, Equipment. Some customers may complain about the following symptoms occurring when driving without anything ahead (no metallic object reflects the radar wave such as a vehicle ahead, an oncoming vehicle, a road sign or a guard rail). While using Mazda Radar Cruise Control (MRCC), the MRCC cancels by itself. When MRCC is not in use, “Safety and Driver Support Systems Temporarily Disabled.
• 10186695Jan 14, 2021Engine cooling. Some vehicle may exhibit a tapping noise from the engine during idling; etc., and synchronized to the engine rpm. The tapping noise may be caused by the switchable hydraulic lash adjuster (HLA), which may not work properly due to air bubbles accumulated in the oil passage in it.
• 10186802Jan 13, 2021Wheels. Some vehicles may display incorrect tire pressures in MAZDA CONNECT and/or the MyMazda App. This may be caused by an incorrect calendar entry (month/day/year) after a battery disconnect or infotainment system software update.
• 10185057Dec 17, 2020Body and structure, Equipment. Some vehicles may exhibit water entering the passenger compartment from the rear door through the bottom of the service hole behind the rear door trim during rain or when washing the vehicle.
• 10185046Dec 17, 2020Electrical system. Some customers may experience a no start because the battery is discharged after the vehicle is parked for more than 8 hours. This may be caused by one or more of the following, resulting in excessive parasitic draw (dark current) on the battery.
• 10185181Dec 14, 2020Equipment. In order to ensure key code security, MNAO has restricted key code access for the new auxiliary key. This Service Alert provides information on how to obtain the 10-digit key code needed for cutting a new auxiliary key blank if all auxiliary keys are lost.
• 10185054Dec 10, 2020Equipment, Electrical system. Some customers may experience the master warning light and/or the "In-Vehicle Network Malfunction" warning message in the instrument cluster on with DTC B119F:01, B119F:13 and/or B119F:2B stored when the vehicle position cannot be displayed correctly.

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