2021 Mazda CX-30 Technical Service Bulletins

616 technical service bulletins (TSBs) are on record for the 2021 Mazda CX-30. 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.

• 11000962May 10, 2024Engine, Transmission and drivetrain. SPECIAL SERVICE PROGRAM - SSPD5 - WARRANTY EXTENSION - MULTI-MODEL - VALVE STEM SEALS CLASS ACTION In conjunction with a Class Action Settlement, Mazda Motor Corporation has decided to conduct an extension of the Engine powertrain warranty related to excessive oil consumption.
• 11000683May 7, 2024Body and structure, Other or unknown. Some customers may complain about intermittent audio no sound from the MAZDA CONNECT infotainment system and/or static noise from the speakers. The concern may be reproduced by tapping on the dash pad near the MAZDA CONNECT center display and the following DTC's may be stored. U0186:08 Communication error with audio amplifier U2145:08 Communication error with remote tuner (RT) U2145:02 Communication error with…
• 10254189Apr 26, 2024Other or unknown. Some customers may experience a “Telematics Malfunction” message in the instrument cluster with DTC U3000:04-TCU (Telematics communication unit internal malfunction) stored in memory. This is caused by improper control software of the telematics communication unit (TCU). To eliminate this concern, the control software of the TCU has been modified.
• 10254098Apr 24, 2024Air bags. A customer may complain of a rattle noise from the right side of the dash. The noise may be coming from the passenger side airbag.
• 10254188Apr 22, 2024Other or unknown, Electrical system. Some customers may complain that the ambient temperature on the instrument cluster is displayed more than 50 °F (10 °C) lower than the actual temperature, resulting in insufficient performance of the air conditioning. This is caused by inappropriate soldering in the ambient temperature sensor. To eliminate this concern, the soldering process has been enhanced at the supplier.
• 10254186Apr 19, 2024Engine cooling. A tapping/rattling noise may be noticed from the valve train area. This operating condition can occur on new vehicles which have been delivered to Mazda dealers (due to loading and unloading from transport trucks or customers moving their vehicles in and out of their garages to wash the vehicle, etc.). This condition may also occur if the engine is not allowed to warm up after multiple cold starts.
• 10254096Apr 17, 2024Body and structure. The customer may report a rattling noise from the front of the vehicle under load. It may sound as if it is coming from the dashboard, but it is coming from the hood prop rod (aka lock-bonnet stay). The prop rod diameter was increased in November 2022 production, but in some circumstances, the noise may still be encountered in vehicles after this production range. Follow the repair information below to confirm the…
• 10254190Apr 11, 2024Exterior lighting, Latches, locks and linkages, 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 Climate Control
• 10254183Apr 11, 2024Electrical system, Latches, locks and linkages. 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.
• 10254191Apr 10, 2024Wheels. 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 or discoloration.
• 10254095Apr 9, 2024Electrical system, Equipment. Some customers may complain about intermittent audio no sound from the MAZDA CONNECT infotainment system and/or static noise from the speakers. The concern may be reproduced by tapping on the dash pad near the MAZDA CONNECT center display and the following DTC's may be stored. U0186:08 Communication error with audio amplifier U2145:08 Communication error with remote tuner (RT) U2145:02 Communication error with…
• 10254185Apr 2, 2024Forward collision avoidance, Brakes, 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.
• 10252505Mar 26, 2024Electrical system, Exterior lighting. Some customers may experience that, with a specific operation, the touch sensor of front door outer handle does not lock and unlock the doors but the remote transmitter operates correctly. Description of the specific operations: Specific Operation 1 [MX-30]: After using cabin preconditioning or hazard warning lights for approx.15 minutes. Specific Operation 2 [MAZDA3 and CX-30]: After using hazard warning lights…
• 10252509Mar 14, 2024Engine cooling, Electrical system, 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, Climate control
• 10252503Mar 14, 2024Electrical system. Some customers may experience a “Telematics Malfunction” message in the instrument cluster with DTC U3000:04-TCU (Telematics communication unit internal malfunction) stored in memory. This is caused by improper control software of the telematics communication unit (TCU). To eliminate this concern, the control software of the TCU has been modified.
• 10252508Mar 8, 2024Brakes. 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.
• 10252507Mar 6, 2024Transmission and drivetrain. Due to limitations, certain vehicles from 2016 to current models might display an inaccurate transmission part number in the Global Electronic Parts Catalog (GEPC). To provide support in such cases, a temporary lookup guide has been developed for assistance.
• 10252504Mar 5, 2024Body 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).
• 10252502Mar 4, 2024Brakes. 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.
• 10251391Feb 21, 2024Equipment, Engine cooling, Electrical system. Frequently Asked Questions (FAQ): General Questions, Reception Level Inspection, Setup and Getting Started, Dealer Processes, Registration / Enrollment, TCU Activation, WI-FI General Information, 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…
• 10251387Feb 12, 2024Brakes, Steering, Transmission and drivetrain, Wheels, Tires, 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.
• 10251390Feb 8, 2024Engine cooling, Electrical system, Equipment. Frequently Asked Questions (FAQ): General Questions, Reception Level Inspection, Setup and Getting Started, Dealer Processes, Registration / Enrollment, TCU Activation, WI-FI General Information, 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…
• 10251367Feb 5, 2024Brakes. NOTE: Before proceeding, perform MGSS Vehicle Inquiry (MGSS -> Other Applications -> Warranty Veh. Inq. -> RECALLS / SPECIAL SERVICE PROGRAMS -> Status) and check for Open campaigns. If any of the following campaigns are open, complete the campaign before proceeding with this service information.
• 10251373Feb 1, 2024Equipment, Electrical system. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
• 10249503Jan 25, 2024Seats, Other or unknown. Some customers may complain of a squeaking noise from the driver side seat back. The noise may be due to rubbing between the lumbar part of the driver’s seat back (1) and the rear console lid. The lumbar support pad may be deformed outward and may rub against the rear console lid while driving or when adjusting the seat memory. This can cause a squeaking noise.
• 10248393Dec 20, 2023Engine cooling. Some customers may experience the check engine light ON with DTC P0126:00 (Thermostat stuck open) and one or more of the following symptoms: The engine takes longer to warm up The engine temperature gauge fluctuates The low coolant temperature indicator (blue) light stays on longer or comes on while driving Poor heater performance, especially at idle
• 10248394Dec 18, 2023Electrical system, Equipment. Some vehicles may exhibit an “In Vehicle Network Malfunction” message appearing in the instrument cluster with DTC U3000:04-TCU (Telematics communication unit internal malfunction) stored after the connected service contract has been discontinued. This is caused by improper control software of the telematics communication unit (TCU). To eliminate this concern, the control software of the TCU has been modified
• 10248390Dec 8, 2023Steering, Body and structure. Before judging a steering wheel as having premature wear or a defect, first clean the steering wheel as explained in the repair information. Some vehicles may have steering wheel stains caused by chemicals such as hand lotions.
• 10248388Dec 7, 2023Equipment, Electrical system. Qi Wireless Charger symptom troubleshooting
• 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…
• 10248348Dec 1, 2023Equipment, Visibility (wipers, defrost, mirrors). Some customers may complain about color discrepancies (brightness differences) of the image displayed on the screen when using the 360°view monitor. As this phenomenon is not a system failure, do not make any repairs or replace any parts.
• 10246133Nov 20, 2023Seats. At PDI or when new vehicle is delivered, some customers may complain about wrinkles on the leather seat cushion and/or seat back surface.
• 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.
• 10246210Nov 14, 2023Other or unknown, Equipment, Electrical system. In-Vehicle Network Malfunction error message and Master Warning light ON with DTC U3000:04 (Telematics communication unit internal malfunction) stored.
• 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.
• 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.
• 10244585Oct 31, 2023Electrical system, Other or unknown, Body and structure. A customers may experience a roof water leak. The symptoms may include: Water in the spare tire well, Water in the rear differential, Electrical malfunctions, Infotainment system no audio sound from radio or other audio sources due to Remote Tuner water intrusion. The source of the leak may be pinhole anywhere along the roof seams under the 2 trim strips (where the roof rails attach). Depending on the location of…
• 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
• 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.
• 10244661Oct 10, 2023Visibility (wipers, defrost, mirrors), Electrical system. 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).
• 10244674Oct 6, 2023Exterior lighting. Some customers may notice an abnormal noise (i.e. whine, groan, rattle or squeak) coming from the front combination lights when turning them on, or a few minutes after turning them off. The noise may be due to contamination by foreign matter during the manufacturing process. The fan motor bearing may become worn out during use. To eliminate the noise, the production process at the supplier and the material has been…
• 10244665Oct 6, 2023Equipment. Some customers may complain about the Active Driving Display not displaying turn by turn (TBT) travel direction or navigation information.
• 10244670Oct 3, 2023Transmission and drivetrain, Engine cooling. Some customers may complain about engine surging 100-200 rpm when accelerating up a hill at altitudes around 6,700 feet or higher. This concern may be caused by improper PCM control software in particular situations. To eliminate this concern, the PCM control software has been modified.

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