2019 Mazda MAZDA3 Technical Service Bulletins

827 technical service bulletins (TSBs) are on record for the 2019 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.

• 10248387Dec 7, 2023Electrical system, Equipment. Frequently Asked Questions (FAQ): General Questions Reception Level Inspection Setup and Getting Started Dealer Processes Registration / Enrollment TCU Activation WI-FI General Informatio Conditions for Remote Engine Start Will Not Function WI-FI How-To Conditions for Remote Engine Start Function Will turn engine OFF WI-FI Trial Period Deactivation Mode Interacting With The App Educational Videos Service Issues…
• 10248392Dec 5, 2023Engine cooling. There is a concern that some water pumps are being replaced that are not faulty, due to signs of a very small coolant leak from the bleed hole. This Service Alert is to inform you about the water pump sealing mechanism and the criteria if replacement is necessary or not.
• 10248389Dec 5, 2023Electrical system, Equipment. 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: DO NOT swap TCU with another vehicle as the TCU is VIN locked after activation. A TCU swap with another vehicle will disable Connected Services on both vehicles. If…
• 10246216Nov 15, 2023Brakes, Equipment. This information will give you the necessary knowledge to respond to customers concerns of Smart Brake Support (SBS) unintended braking. By educating the customer on the system operation, it should reduce their anxiety or distrust of the vehicle.
• 10246207Nov 14, 2023Fuel system. When opening the fuel-filler lid to refuel, some customers may notice water and/or sand in the fuel-filler lid box area. They may complain about dried sand causing poor appearance.
• 10246147Nov 14, 2023Equipment, Electrical system. Some customers may experience no sound from the audio system and/or the audio source cannot be changed. This concern may be caused by the remote tuner not operating properly under certain situations. To eliminate this concern, the remote tuner control software has been modified.
• 10246127Nov 14, 2023Transmission and drivetrain. Some vehicles may exhibit a chirp noise (stick-slip noise) from the automatic transaxle (AT) when shifting from 3 to 4 while driving. This may be caused by the automatic transaxle fluid (ATF) being contaminated by iron powder due to excessive wearing of the lock up clutch in the torque converter.
• 10246146Nov 8, 2023Suspension, Other or unknown. Some customers may complain about the poor appearance due to an uneven rear beltline molding joint. This concern is caused by the rear beltline molding not being manufactured according to the original designed shape. To eliminate this concern, the rear beltline molding manufacturing process was improved to prevent form shape discrepancies from the original design.
• 10246137Nov 8, 2023Other or unknown, Latches, locks and linkages, Electrical system. Some customers may experience one or both of the following symptoms while locking and unlocking the doors works fine using the remote transmitter. Symptom 1: The touch sensor of the front door outer handle does not lock the doors after rain and/or car washing, even though unlocking is possible. Symptom 2: The touch sensor of the front door outer handle does not unlock the doors.
• 10246121Nov 7, 2023Electrical system, Equipment. The Mazda DCA-8000 is required for all warranty battery testing. If the Mazda DCA-8000 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.
• 10244672Oct 31, 2023Transmission and drivetrain. Some vehicles may exhibit a chirp noise (stick-slip noise) from the automatic transaxle (AT) when shifting from 3 to 4 while driving. This may be caused by the automatic transaxle fluid (ATF) being contaminated by iron powder due to excessive wearing of the lock up clutch in the torque converter.
• 10244658Oct 26, 2023Body and structure. Some customers may complain of a rattle noise coming from near the center of the dash.
• 10244669Oct 23, 2023Engine cooling, Equipment. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF
• 10244562Oct 19, 2023Body and structure. Some vehicles may have a water leak and/or a technician may find water inside the cabin or within a component. The source of the leak may be from between the doors at the B-pillar. To correct this concern, there was a mass production change (MPC) on January 14, 2021 to reduce the gap (as seen in the image below).
• 10244679Oct 11, 2023Equipment, Electrical system, Engine cooling. 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 MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices.
• 10244665Oct 6, 2023Equipment. Some customers may complain about the Active Driving Display not displaying turn by turn (TBT) travel direction or navigation information.
• 10243552Sep 26, 2023Body and structure. Some vehicles may exhibit that the glass run channel of the front door interferes with the rear door garnish. Since the front door glass run channel is not fixed to the door strongly enough for the following situations, cycles of door operation may result in interference and lead to damage on the seal rubber at the rear door. When the front door glass is closed, the glass run channel may be forced to move to the B…
• 10243568Sep 15, 2023Brakes. Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to the following information to understand why symptoms may occur, and to better assist the customer in resolving their specific brake concern.
• 10243546Sep 15, 2023Brakes. Symptom 1: Some customers may complain about hearing a grinding noise and/or vibration occur when applying the brake. This is due to rust on the rear brake disc plate. Symptom 2: Some vehicles may exhibit a squeal noise from the rear brakes when braking lightly while driving at a slow speed. The squeal noise is caused by the disk pad surface fluctuating.
• 10243569Sep 13, 2023Visibility (wipers, defrost, mirrors), Body and structure. Some vehicles may experience exterior trim heat damage when parked near a glass building or Low-E windows. This may be caused by the sun's reflection.
• 10241637Aug 28, 2023Electrical system. Some customers may complain about scratches on the instrument cluster lens.
• 10241636Aug 28, 2023Electrical system. Qi Wireless Charger Symptom Troubleshooting
• 10241634Aug 28, 2023Exterior lighting, Equipment, Engine cooling. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF
• 10241632Aug 28, 2023Equipment. Some customers may experience infotainment door rattle noise. Follow the repair procedure to help determine the cause.
• 10241631Aug 28, 2023Equipment. Some customers may experience an infotainment sub-woofer rattle noise. Follow the repair procedure to help determine the cause.
• 10241612Aug 16, 2023Engine cooling. A new cylinder head assembly for service parts has been newly established for SKYACTIV-G 2.5 with cylinder deactivation when replacement is needed. Valves, valve springs, valve spring seats, and cotters (IN/EX) are included in the new assembly. Dealers can now utilize the Limited Parts Ordering (LPO) page on eMDCS to order the repair parts for 2.5L (with cylinder deactivation) and 2.5L turbo cylinder head repairs.
• 10241633Aug 15, 2023Engine cooling, Exterior lighting, Equipment. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF
• 10241610Aug 3, 2023Electrical system. Some vehicles may exhibit the warning message "Ultrasonic Sensor Malfunction" in the instrument cluster and the following DTC(s) stored after replacing the front and/or rear ultrasonic sensor(s) during body or paint repair.
• 10241608Aug 1, 2023Engine cooling, Transmission and drivetrain. Some customers may complain about a surging at low speeds and during acceleration. This surging is in the longitudinal direction, felt about 2 cycles per second, and occurs in the locked up 1st gear. This may be caused by the torque fluctuation and the torsional resonance in the torque converter. To correct this concern, the PCM software has been modified to reduce the torque fluctuation.
• 10240372Jul 26, 2023Air bags. Some vehicles may exhibit that the air bag warning light turns on or repeats cycles of turning on and off with DTC B1126:13 and/or B1127:13 stored in memory.
• 10240424Jul 25, 2023Equipment, Electrical system. Updated software release for concerns with MAZDA CONNECT infotainment system. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Ver. 7000C0A-NA01_12006 or later).
• 10240494Jul 21, 2023Equipment. Some customers may complain about the Active Driving Display not displaying turn by turn (TBT) travel direction or navigation information.
• 10240408Jul 18, 2023Electrical system, Visibility (wipers, defrost, mirrors). Some customers may experience “Ultrasonic sensor malfunction” warning message displayed in the instrument cluster when driving or at a stop. The warning message continues until the ignition is turned off. Upon inspection, one or more of following DTC are detected in the parking assist unit (ultrasonic).
• 10240385Jul 13, 2023Visibility (wipers, defrost, mirrors), Body and structure. Some vehicles may experience white-streak stains appearing on the front door that look like they seeped out from under the outer mirror base. This is caused by water intruding from gaps of the outer mirror body and/or the hinge of the outer mirror, and corrosion occurring on the aluminum die-cast inner base in the outer mirror. Water, including white-salty corrosion, may drip out from gaps under the outer mirror…
• 10240403Jul 10, 2023Latches, locks and linkages, Electrical system. Some customers may experience one or both of the following symptoms while locking and unlocking the doors works fine using the remote transmitter. Symptom 1: The touch sensor of the front door outer handle does not lock the doors after rain and/or car washing, even though unlocking is possible. Symptom 2: The touch sensor of the front door outer handle does not unlock the doors.
• 10240373Jul 10, 2023Electrical system, Seats. Some customers may complain that the seat warmer does not operate when turning the ignition on while the seat is warm but when turning the ignition off then on again, the seat warmer begins to operate appropriately. DTCs B1030:13 and/or B1032:13 are stored. This is caused by the seat warmers fail-safe mode which prevents it from working during the initial drive cycle. To correct this issue, the seat warmer has been…
• 10240399Jul 7, 2023Equipment. Some CX-5 and CX-30 customers may find that the liftgate does not close when pressing the power liftgate (PLG) rear switch (A) located on the interior liftgate trim. This may be caused by PLG switch corrosion. Water from a high pressure car washer and/or condensation may drip onto the switch connector and cause corrosion. To eliminate this concern, the PLG rear switch has been modified with a waterproof connector.
• 10240496Jul 6, 2023Body and structure. Some vehicles may experience exterior trim heat damage when parked near a glass building or Low-E windows. This may be caused by the sun's reflection.
• 10240484Jul 5, 2023Engine cooling, Equipment, Latches, locks and linkages, Exterior lighting. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
• 10238689Jun 28, 2023Equipment, Engine cooling. Connected Services, Frequently Asked Questions (FAQ)
• 10238671Jun 23, 2023Visibility (wipers, defrost, mirrors). Some customers may complain that the frequency of replenishing the window washer liquid is higher than expected, or they may complain of leakage at or around the washer motor (1). This is caused by a crack that may occur at the joint section of the washer motor housing due to an inappropriate assembly process. To eliminate this concern, the design of the washer motor has been modified to not have a joint section.
• 10238667Jun 14, 2023Air bags, Steering. Some vehicles with the two-step deployment control air bag module may exhibit a clicking sound when turning the steering wheel. This is caused by the horn spring (1) of the airbag module interfering with the black color tape (2) of the clock spring harness (3), resulting in a stick-slip noise (click on attached sound file below).
• 10238681Jun 12, 2023Body and structure, Latches, locks and linkages, Exterior lighting, Engine…. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
• 10238670Jun 12, 2023Latches, locks and linkages, Electrical system. Some customers may experience that the out-of-area (reception area) type auto lock function sometimes fails. When the front door is being closed with a hand touching one or both of the touch sensors on the front outer handle, the out-of-area (reception area) type auto lock function may fail. Control software of the LF control unit (LFU) has been modified.
• 10238700Jun 6, 2023Engine cooling. A new cylinder head assembly for service parts has been newly established for SKYACTIV-G 2.5 with cylinder deactivation when replacement is needed. Valves, valve springs, valve spring seats, and cotters (IN/EX) are included in the new assembly. Dealers can now utilize the Limited Parts Ordering (LPO) page on eMDCS to order the repair parts for 2.5L (with cylinder deactivation) and 2.5L turbo cylinder head repairs.
• 10238697Jun 5, 2023Equipment, Body and structure. Interior parts made of resin have antistatic coating to prevent dust from sticking on the surfaces, and depending on the conditions of use, the antistatic components may crystallize slightly, giving an appearance of white stains on the surface. To remove the stains, wipe the stained surface with a towel soaked with water mixed with a small portion of a neutral detergent. If the white stains reappear again, simply…
• 10238663Jun 5, 2023Engine cooling. Some vehicles may exhibit oil leakage from the drive belt auto tensioner and rattling noises from the engine compartment. This may be caused by insufficient sealing at the drive belt auto tensioner damper when the auto tensioner fully operates under both high ambient temperature and high load conditions. To eliminate this concern, the shape of the drive belt auto tensioner damper has been changed.
• 10237208May 31, 2023Electrical system, Equipment. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
• 10237216May 24, 2023Engine cooling, Electrical 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 MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices.
• 10237210May 24, 2023Engine cooling, Electrical system, Equipment. Frequently Asked Questions (FAQ)

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