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Service bulletins for the 2020 Mazda Mazda3

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.

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

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Bulletins, newest first
SA-032-202020-02-29. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM); EQUIPMENT. 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, it is available as a dealer installed accessory. SiriusXM Traffic Plus and Travel Link are available on the 2019-2020 Mazda3 and 2020 CX-30 Preferred Package and above, as a paid subscription. Traffic Plus feature requires in-vehicle navigation SD card. SiriusXM Satellite Radio trial subscription is free of charge for 3 months.
SA-030-202020-02-27. Service bulletin. POWER TRAIN. 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.
SA-029-202020-02-27. Service bulletin. ELECTRICAL 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. 1 malfunction B1252:87 TCU - Communication error with connectivity master unit (CMU) U0156:00 VCM - Communication error with connectivity master unit (CMU) U0156:00 BCM - Communication error with connectivity master unit (CMU) U0198:00 BCM - Communication error with emergency call unit U212D:00 BCM - Communication error with light control module (RH) U3000:00 TCU - Telematics communication unit internal malfunction
SA-028-202020-02-27. Service bulletin. 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.
SA-027-202020-02-27. Service bulletin. EQUIPMENT; 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 updated to the latest software version. • Apple Carplay/Android Auto FAQ, go to SA-001/19. Index: No. 1 Blank Screen No. 2. Rear View Camera is not displayed No. 3 Rebooting No. 4 Infotainment System Has No Sound No. 5 Commander Switch Does Not Work No. 6 Bluetooth device will not pair No. 7 Incorrect GPS position No. 8 Voice Recognition Does Not Work No. 9 Cannot Make a Hands-Free Call No. 10 Cannot Play Bluetooth Audio No. 11 How to Check Navi SD Card VIN Lock
SA-021-202020-02-27. Service bulletin. STRUCTURE:BODY:TRUNK LID; EQUIPMENT; LATCHES/LOCKS/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 bag.
SA-012-20b2020-02-27. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY; ELECTRICAL 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. Index: PDI fuse, Apple CarPlay / Android Auto Install Kit, Blind Spot Monitoring System (BSM), Front Wiper Service Caution, i-ACTIVSENSE Switch, Traffic Sign Recognition (TSR), MAZDA CONNECT Power Function, MAZDA CONNECT Center Display View, In-Vehicle Digital Owner's Manual, Navigation System, SIRIUSXM Data Service, Power Door Locks, Auxiliary Key, Transmitter Battery Saving Function, Keyless Entry Using Auxiliary Key, Rear Door Child Safety Locks Operation, Link Seat & Climate Control Temperatures, Seat Warmer Turns OFF, Electric Parking Brake (EPB), A/C Air Temperature Is Not Cold, Tire Pressure Monitoring System (TPMS), Condition Based Maintenance, M-MDS (MDARS), Part Replacement
SA-016-202020-02-04. Service bulletin. SEATS. 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. NOTE: Customers in cold weather are more likely to complain about this if their vehicle is equipped with Mazda Mobile Start (MMS) (not available on Mazda3 or CX-30) because the MMS accessory instructions state the seat warmers WILL turn on when the engine is restarted. The same can happen in the hotter weather with the seat ventilation. This information is incorrect for these vehicles. Both features will now require a manual setting every time the vehicles are restarted after being turned off. Consult the vehicle’s owner’s manual for more details on proper seat warmer/seat ventilation operation.
SA-019-202020-02-04. Service bulletin. SERVICE BRAKES, HYDRAULIC. 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.
SA-018-202020-02-04. Service bulletin. POWER TRAIN; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. 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.
SA-017-202020-02-04. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. BODY CONTROL MODULE (BCM), VEHICLE CONTROL MODULE (VCM) OR INSTRUMENT CLUSTER (IC) MDARS SOFTWARE UPDATE FAILURE
SA-014-202020-02-04. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. 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.
SA-012-20a2020-02-04. Service bulletin. ELECTRICAL SYSTEM; WHEELS; EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY. 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. Index: PDI fuse, Apple CarPlay / Android Auto Install Kit, Blind Spot Monitoring System (BSM), Front Wiper Service Caution, i-ACTIVSENSE Switch, Traffic Sign Recognition (TSR), MAZDA CONNECT Power Function, MAZDA CONNECT Center Display View, In-Vehicle Digital Owner's Manual, Navigation System, SIRIUSXM Data Service, Power Door Locks, Auxiliary Key, Transmitter Battery Saving Function, Keyless Entry Using Auxiliary Key, Rear Door Child Safety Locks Operation, Link Seat & Climate Control Temperatures, Seat Warmer Turns OFF, Electric Parking Brake (EPB), A/C Air Temperature Is Not Cold, Tire Pressure Monitoring System (TPMS), Condition Based Maintenance, M-MDS (MDARS), Part Replacement
SA-012-202020-02-04. Service bulletin. VISIBILITY; EQUIPMENT ADAPTIVE/MOBILITY; WHEELS; ELECTRICAL 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. Index: PDI fuse, Apple CarPlay / Android Auto Install Kit, Blind Spot Monitoring System (BSM), Front Wiper Service Caution, i-ACTIVSENSE Switch, Traffic Sign Recognition (TSR), MAZDA CONNECT Power Function, MAZDA CONNECT Center Display View, In-Vehicle Digital Owner's Manual, Navigation System, SIRIUSXM Data Service, Power Door Locks, Auxiliary Key, Transmitter Battery Saving Function, Keyless Entry Using Auxiliary Key, Rear Door Child Safety Locks Operation, Link Seat & Climate Control Temperatures, Seat Warmer Turns OFF, Electric Parking Brake (EPB), A/C Air Temperature Is Not Cold, Tire Pressure Monitoring System (TPMS), Condition Based Maintenance, M-MDS (MDARS), Part Replacement
SA-010-202020-01-30. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. 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.
SA-004-202020-01-30. Service bulletin. EQUIPMENT. 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:
SA-002-202020-01-30. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. 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 hole.
SA-001-202020-01-30. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. When performing Recall 4219L, make sure to connect a battery charger as stated in the Recall. If there are any issues, contact Hotline for assistance.
DRW262020-01-30. Service bulletin. EQUIPMENT. 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 repaired. All dealers must return their MDRT DRW26 Tool to Mazda with a Warranty Part Return Shipping label by January 17, 2020. This short time frame is required to reprogram the MDRT to support other activities. Any MDRT DRW26 Tool not returned to Mazda will incur the $1,000.00 missing tool charge.
09-008-20-36752020-01-30. Service bulletin. STRUCTURE:BODY; EQUIPMENT. 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. If you encounter this concern during PDI, use a heat gun or an infrared drier to apply heat to the affected area to remove the stain(s).
09-007-20-36742020-01-30. Service bulletin. SEATS. 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.
09-006-20-36732020-01-30. Service bulletin. EQUIPMENT. 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).
07-001-20-36602020-01-30. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:APPLIANCE:AIR CONDITIONER. 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 control software of the Dash-Electrical Supply Unit (Dash-ESU) has been modified.
02-003-20-36772020-01-30. Service bulletin. STEERING. 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.
09-003-20-36712020-01-23. Service bulletin. EQUIPMENT; 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 manufactured with tamper-proof speedometers. • When a speedometer is replaced, the new speedometer will read zero (0) miles. • This procedure is extremely important to accurately represent actual vehicle mileage. • Prior to speedometer removal, complete the information required on the “Speedometer Replacement Label”. Labels can only be ordered through Mazda eStore. • In an effort to achieve a higher level of Customer Experience and retain the value of Mazda’s vehicles, MNAO Warranty Operations is allowing all Mazda dealers to utilize a third party, SPECMO Enterprises, Inc., for Instrument Panel Cluster (IPC) odometer setting service. With the use of SPECMO’s services, it is possible that the odometer will be set between 10 to 31 miles over the odometer mileage at the time of replacement for both warranty and customer pay repairs. Please make sure that the customer is aware that there may be a slight variance to the odometer, in which case the customer may have to accept the slightly higher mileage. Since odometer setting service is not part of the warranty repair, it is not warrantable nor required, but optional. However, Mazda Warranty policy provides after- warranty assistance (AWA) or DSA that can be utilized to cover this service expense.

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