2020 Mazda MAZDA3 Technical Service Bulletins

726 technical service bulletins (TSBs) are on record for the 2020 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.

• 10174585Apr 17, 2020Electrical system, Latches, locks and linkages. Some customers may find that they cannot lock their vehicle when using the touch sensor (shown below) on the front door handle, however, they can unlock the vehicle. This concern may occur after the vehicle has been recently washed and water has accumulated around the touch sensor, resulting in temporarily lowering the sensitivity of the capacitor sensor. To eliminate this concern, the shape and material of the…
• 10174577Apr 15, 2020Equipment. Some customers may experience œUltrasonic 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). This is caused by communication error(s) detected between the parking assist unit and the ultrasonic…
• 10174573Apr 15, 2020Equipment. Some customers may notice that the temperature setting of the automatic climate control may not change when the temperature dial is operated very slowly. Due to improper control logic of the automatic climate control unit (IP-ESU), turning operation may not be detected when the dial is operated very slowly. To eliminate this concern, the IP-ESU software has been modified.
• 10174572Apr 15, 2020Equipment. Some customers may notice that the temperature setting of the automatic climate control may not change when the temperature dial is operated very slowly. Due to improper control logic of the automatic climate control unit (IP-ESU), turning operation may not be detected when the dial is operated very slowly. To eliminate this concern, the IP-ESU software has been modified.
• 10174689Apr 14, 2020Forward collision avoidance, Lane departure, Visibility (wipers, defrost…. FSC dynamic aiming (mid-drive aiming) may not complete if the vehicle is driven on a road as described below:  The road lane markings are covered by snow and are not visible.  There are no road lane markings on the road surface.  The road is winding and the vehicle cannot drive straight (300 m / 984 ft or more turning radius is required).
• 10174625Apr 8, 2020Electrical system, Equipment. Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored:  B119F:01 TCU - Tel antenna No.
• 10174624Apr 8, 2020Electrical system, Equipment. MAZDA CONNECT Software Version 11002. NOTE: “Mazda3 owners may notice an icon in their infotainment’s display that indicates Mazda Connected Services. This new feature is a global technology and designed with the latest version of Mazda ConnectTM. At this time, the service is not active for Mazda3 vehicles in the U.S. Any updates to the service will be announced at the appropriate time.”
• 10174590Apr 8, 2020Equipment. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 7000C0A-NA01_11002 or later). MAZDA CONNECT Software Version 11002 NOTE: “Mazda3 owners may notice an icon in their infotainment’s display that indicates Mazda Connected Services. This new feature is a global technology and designed with the latest version of Mazda ConnectTM. At this…
• 10174685Apr 2, 2020Wheels. Some vehicles may display incorrect tire pressures in MAZDA CONNECT. This may be caused by an incorrect calendar entry (month/day/year) after a battery disconnect or infotainment system software update.
• 10174677Apr 2, 2020Electrical system, Equipment, Engine cooling. 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. IMPORTANT:  The engine will not start unless the key transmitter is held over the Start Stop button.  Outside door handle lock/unlock touch sensor is inoperative.  Key transmitter indicator lights…
• 10174682Apr 1, 2020Forward collision avoidance, Equipment. Some vehicles may exhibit DTC U2120:00 and/or U2500:82 stored in memory and the i-ACTIVSENSE warning light (amber) ON when turning ON the ignition after any electronic control unit (ECU) is reprogramed or configured using MDARS. NOTE: ECU stands for general units (cameras and modules), all of which can be reprogrammed.
• 10173223Mar 23, 2020Equipment, Electrical system. When the body control module (BCM) has been replaced or reprogrammed and the software is updated to the file names shown below, DTC U2050:55-BCM (Activation of remote control not implemented) may be stored in memory without any warning indication for the driver. This is caused by a communication error between the telematics communication unit (TCU) and BCM when the control software in them are not of the version…
• 10173254Mar 12, 2020Brakes, Equipment, Electrical system, Back-over prevention (rear camera). Some customer may experience all of the following when turning the ignition ON under hot weather conditions such as parking under the hot sun for some period of time:  i-ACTIVSENSE warning light ON (1)  Smart Brake Support (SBS) indicator light ON (2)  "Excessive Camera Temp. Drive Safely" or "Safety and Driver Support Systems Temporarily Disabled" warning messages  DTC B14F9:00 stored in…
• 10173097Mar 12, 2020Transmission and drivetrain, Brakes, Engine cooling, Equipment. 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.
• 10173252Mar 9, 2020Electrical system, Equipment. 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. IMPORTANT:  The engine will not start unless the key transmitter is held over the Start Stop button.  Outside door handle lock/unlock touch sensor is inoperative.  Key transmitter indicator lights…
• 10173228Mar 4, 2020Equipment. The owner’s manual contains procedures and precautions for the maintenance and cleaning of plastic parts, like the brand emblem. However, it is still important to remind customers about these precautions. Customers should never use inadequate, harsh or aggressive cleaning products on plastic parts.
• 10173249Mar 3, 2020Forward collision avoidance, Equipment. Some vehicles may have one of the following DTCs stored in memory:  C1001:92 - Forward sensing camera (FSC) poor field of view  B14F0:92 - General temporary failure in forward sensing camera (FSC) DTC C1001:92 or B14F0:92 set as a past record for low visibility of the Forward Sensing Camera (FSC). It does not mean there is an actual FSC defect.  In some cases the customer may have a concern with…
• 10171839Feb 28, 2020Electrical system. 2019-2020 MAZDA3 SERVICE CAUTIONS FOR NEW AND REVISED FEATURES. The 2019-2020 Mazda3 has new and revised features that are different from previous models, and may be difficult to understand. This Service Alert provides valuable information to support potential dealer and customer concerns.
• 10171838Feb 28, 2020Electrical system. When the body control module (BCM) has been replaced or reprogrammed and the software is updated to the file names shown below, DTC U2050:55-BCM (Activation of remote control not implemented) may be stored in memory without any warning indication for the driver.This is caused by a communication error between the telematics communication unit (TCU) and BCM when the control software in them are not of the version…
• 10171836Feb 28, 2020Equipment. DTC P0942:49 TROUBLESHOOTING: P0942:49 is missing from the Workshop Manual on MGSS. Follow the repair procedure below to repair the vehicle until the information is added to the Workshop Manual.
• 10171834Feb 27, 2020Equipment. Some customers may complain about SiriusXM Travel Link, Traffic Plus showing expired even though the customer purchased a paid subscription. SiriusXM audio packages do not include SiriusXM Travel Link, Traffic Plus. To get Traffic Plus, the customer must purchase the Infotainment "SiriusXM Traffic Plus with SiriusXM Travel Link (TM)" package.
• 10171833Feb 27, 2020Equipment. SiriusXM Traffic Plus and Travel Link are displayed with Mazda in-vehicle factory navigation systems. Both of these services provide information in the U.S. & Canada. NOTE: SiriusXM Traffic Plus and Travel Link subscription is free of charge for 3 years only if equipped with factory installed navigation system. NOTE: 2019-2020 Mazda3 and 2020 CX-30 are not equipped with factory installed navigation system,however…
• 10171843Feb 26, 2020Wheels. 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.
• 10171792Feb 26, 2020Transmission and drivetrain. Service part Automatic Transaxles (ATX) manufactured on or after July, 2018 are shipped with a blank TCM that requires configuration. NOTE: The following Caution is included with every ATX that requires configuration.
• 10171842Feb 25, 2020Electrical system. Some customers may experience the master warning light turning on and a lack of power with DTC P2BF6:00 (Exhaust shutter valve position sensor circuit low input (1DC)) stored in memory. The PCM software has been modified to avoid the unnecessary warning light illumination and power restriction with no modification to the cylinder deactivation function.
• 10171791Feb 25, 2020Electrical system. Some customers may experience a "IN-VEHICLE NETWORK MALFUNCTION" warning message in the instrument cluster with one or more of the following DTC's stored: B119F:01 TCU - Tel antenna No.
• 10171789Feb 18, 2020Body and structure. Refer to the Repair Procedure when installing the trunk weatherstrip for guidance, otherwise water may enter the trunk during heavy rain or when going through a car wash if it is not installed properly.
• 10171788Feb 11, 2020Equipment, Electrical system. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure. REPAIR PROCEDURE NOTE: Before proceeding:  Document the vehicle current CMU software version.  Confirm that the Connectivity Master Unit (CMU) is updated to the latest software version.  Go to MGSS - Infotainment - MAZDA CONNECT Updates  Confirm that the customers device is…
• 10171847Feb 4, 2020Electrical system, Equipment. Some customers may notice a rattle noise from the instrument panel while driving that is localized at the active driving display. The noise is generated by a deformed active driving display interfering with the instrument panel. Excessive heat from direct sunlight warps the cover lens, but does not affect the functionality of the active driving display or cause serious damage (such as smoke emission). To correct…
• 10171782Feb 4, 2020Equipment, Body and structure, Latches, locks and linkages. The Mexico built Mazda3 trunk has been disabled (interior and exterior switches do not work) during shipment from Mexico to help prevent theft of the key/fob and other accessories as center caps, SD cards etc.hidden in the trunk. This Service Alert describes the steps to retrieve that key/fob (if the key/fob in the main cabin is missing) and the steps for processing warranty depending on missing items or a missing…
• 10171781Feb 4, 2020Visibility (wipers, defrost, mirrors), Electrical system, Equipment. 2019-2020 MAZDA3 SERVICE CAUTIONS FOR NEW AND REVISED FEATURES. The 2019-2020 Mazda3 has new and revised features that are different from previous models, and may be difficult to understand. This Service Alert provides valuable information to support potential dealer and customer concerns.
• 10170941Jan 29, 2020Brakes. 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.
• 10170939Jan 29, 2020Equipment, Transmission and drivetrain, Exterior lighting, Electrical system. 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 .This may be caused by a damaged headlight assembly and/or water in the headlight assembly with any of the possible DTCs.
• 10170816Jan 29, 2020Electrical system, Equipment. Some customers may experience one side (driver side or passenger side) blowing warmer air out of the vents with the same or very close temperature settings for both sides when using the A/C and no DTCs related to the air conditioner system are stored in memory. This is caused by the air mix doors stopping operation during cranking and not recovering until the ignition is turned off. To correct this concern, the…
• 10170938Jan 24, 2020Equipment, Electrical system. Body control module (bcm), vehicle control module (vcm) or instrument cluster (ic) mdars software update failure
• 10170935Jan 24, 2020Wheels, Equipment, Electrical system, Visibility (wipers, defrost, mirrors). 2019-2020 MAZDA3 SERVICE CAUTIONS FOR NEW AND REVISED FEATURES. The 2019-2020 Mazda3 has new and revised features that are different from previous models, and may be difficult to understand. This Service Alert provides valuable information to support potential dealer and customer concerns.
• 10170942Jan 23, 2020Seats. Some customers may complain that their seat warmers or seat ventilation do not turn on when the engine is restarted after being left on when turning off the engine. The logic has changed from previous Mazdas where the seat warmers and seat ventilation automatically turned on when the engine was restarted.
• 10170814Jan 23, 2020Steering. Some customers may complain that the steering wheel is off center more than 3° even when driving straight on a flat road. Customers having this concern should have their vehicle repaired using the following repair procedure.
• 10170936Jan 16, 2020Electrical system, Equipment. On some vehicles, the Commander switch might be inoperative. This could be caused by fuse F13 (15A) being removed instead of F15 (15A) at the factory in the lower panel compartment on the left side of the steering wheel.
• 10170934Jan 15, 2020Electrical system, Wheels, Visibility (wipers, defrost, mirrors), Equipment. 2019-2020 MAZDA3 SERVICE CAUTIONS FOR NEW AND REVISED FEATURES. The 2019-2020 Mazda3 has new and revised features that are different from previous models, and may be difficult to understand. This Service Alert provides valuable information to support potential dealer and customer concerns.
• 10170830Jan 15, 2020Equipment, Electrical system. TELEMATICS COMMUNICATION UNIT (TCU) INITIALIZATION PROCEDURE: When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to initialize the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated.
• 10170819Jan 13, 2020Equipment, Body 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.
• 10170818Jan 13, 2020Seats. At PDI or when new vehicle is delivered, some customers may complain about wrinkles on the leather seat cushion and/or seat back surface. Customers having this concern should have their vehicle repaired by a qualified upholstery repair specialist using the following repair procedure.
• 10170817Jan 13, 2020Equipment. When encountering a vehicle with paint damage, refer to the "Mazda Pocket Paint Guide" to determine cause, prevention, remedy, and warranty coverage (if applicable). Copies of the Mazda Pocket Paint Guide are available for order on Mazda e-Store (part number: 9999-95-MPPG-12).
• 10170824Jan 9, 2020Equipment. AUXILIARY KEY CUTTING TEMPORARY PROCEDURE: Currently, Mazda does not have a way to cut the auxiliary keys for the new style remote transmitter as they use a different key code than the previous transmitter key. Follow the repair procedure if one or both auxiliary keys are lost:
• 10170661Jan 9, 2020Equipment, Electrical system. In accordance with Federal regulations, follow the procedure listed below when replacing a speedometer. NOTE: Tampering with a motor vehicle odometer is strictly prohibited by Federal, and State laws. It is the dealer’s responsibility to comply with Federal, State, and local laws concerning odometer and related documentation requirements when providing a repair or replacement.  Mazda vehicles are…
• 10170658Jan 9, 2020Vehicle speed control, Engine cooling, Equipment. Some customers may complain about a shift shock and/or an engine RPM increase when setting the Mazda Radar Cruise Control (MRCC) system with no DTCs being stored. NOTE: This concern only occurs on vehicles equipped with a PCM manufactured by MITSUBISHI.This is caused by improper control logic of the PCM allowing the engine RPM increase for an instant right after setting the MRCC. To correct this issue, the PCM…
• 10170656Jan 9, 2020Suspension, Equipment. Some customers may complain of signs of oil on the struts or shock absorbers. In most cases the oil that is present is normal, and a result of the oil that remains on the shaft during the normal sweeping process of the shaft seal. Follow the inspection guidelines below to determine if the condition is a result of the normal sweeping process or a failure of the shaft seal.
• 10170820Jan 8, 2020Equipment. Dealer Rework (DRW) 26 - Mazda Connect Concern 2020 Mazda3 - MDRT Tool Return. On October 1, 2019, Mazda Technical Services sent out an email announcing the launch of DRW26. As advised in our original Dealer Communication the tool (pictured below) would be returned back after all in-stock vehicles have been repaired. Action required: At this time the DRW is concluded and all dealer in-stock vehicles have been…
• 10170822Jan 6, 2020Equipment, Electrical system. WIRELESS CHARGING PAD INSTALLATION INSTRUCTIONS CORRECTION: 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…

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