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Service bulletins for the 2021 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.

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

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Bulletins, newest first
DRW35a2021-01-05. Service bulletin. STRUCTURE; EQUIPMENT. DRW35 - 2021 CX-30 & 2021 MAZDA3 - POTENTIAL PAINT SPOTS ON VEHICLE. Concern Outline: It is possible that fine yellow and/or white paint spots may be present on the entire body surface of the vehicle. The affected vehicles were potentially exposed to overspray from a construction site near the port. Outline of Repair: All vehicles are arriving from Mexico to Port Baltimore and are expected to start shipping to dealers next week. Once the affected vehicle arrives, wash and perform a visual inspection for the presence of the Yellow and/or White Paint spots. If present, cleaning of the painted surfaces are required. If paint spots are present on the piano black parts and moldings, they will be replaced.
09-039-20-37472021-01-05. Service bulletin. EQUIPMENT; STRUCTURE. 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.
09-021-20-3714b2021-01-05. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:ELECTRICAL:ANTENNA. 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.
09-007-20-3674a2021-01-05. Service bulletin. EQUIPMENT; 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.
07-006-20-37582021-01-05. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Some customers may complain that after accelerating in hot weather, the A/C blows warm air for a longer time than other models. This is caused by improper control software of the PCM not allowing the A/C compressor to resume properly after acceleration. To eliminate this concern, the control software of the PCM has been modified.
01-010-20-3706a2021-01-05. Service bulletin. ELECTRICAL 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.
SA-057-20a2020-12-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. HVAC SYSTEM BLOWS HOT AIR UNDER ACCELERATION. Some customers may complain that the HVAC system blows hot air on occasion (blows cold air, then hot air, then cold air again). The customer may notice that it is more pronounced when they first start driving the vehicle and/or when accelerating.
SA-046-20b2020-12-04. Service bulletin. FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERA; EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY. FORWARD SENSING CAMERA (FSC) DYNAMIC AIMING NOT COMPLETED AND/OR DTC B14F0:76 STORED. CAUTION: DO NOT turn the igintion OFF after dynamic aiming starts until aiming has completed or aiming timeout. If the ignition is turned OFF, the VCM will store B14F0:76 and FSC aiming will not complete. 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).
SA-031-20j2020-12-04. Service bulletin. LATCHES/LOCKS/LINKAGES:DOORS:LOCK; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. 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 2020 Mazda3 only). Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF
SA-031-20i2020-12-04. Service bulletin. ENGINE AND ENGINE COOLING; EXTERIOR LIGHTING; ELECTRICAL SYSTEM:SOFTWARE. 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 2020 Mazda3 only). Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF
SA-007-20m2020-12-04. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. MAZDA CONNECTED SERVICES - FREQUENTLY ASKED QUESTIONS (FAQ). 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, Dealer Processes, Educational Videos, Resources
DRW352020-12-04. Service bulletin. STRUCTURE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. DRW35 - 2021 CX-30 & 2021 MAZDA3 - POTENTIAL PAINT SPOTS ON VEHICLE. Concern Outline: It is possible that fine yellow and/or white paint spots may be present on the entire body surface of the vehicle. The affected vehicles were potentially exposed to overspray from a construction site near the port. Outline of Repair: All vehicles are arriving from Mexico to Port Baltimore and are expected to start shipping to dealers next week. Once the affected vehicle arrives, wash and perform a visual inspection for the presence of the Yellow and/or White Paint spots. If present, cleaning of the painted surfaces are required. If paint spots are present on the piano black parts and moldings, they will be replaced.
09-021-20-3714a2020-12-03. Service bulletin. EQUIPMENT:ELECTRICAL:ANTENNA; EQUIPMENT ADAPTIVE/MOBILITY. 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. • B119F:01 (TCU - Tel antenna No. 1 malfunction) • B119F:13 (TCU - TEL antenna No.1 circuit malfunction) • B119F:2B (CMU - GPS antenna signal circuit malfunction) This concern may be caused by incoming noise disturbing the reception of GPS signals, resulting in the wrong vehicle location and the DTC stored. To eliminate this concern, the GPS antenna has been modified.
DRW332020-11-04. Service bulletin. VISIBILITY; STRUCTURE. DRW33 - CHROME PLATED WINDOW MOLDINGS CONCERN FROM PACIFIC TYPHOON: On certain subject vehicles parked outside after production, it is possible that the chrome plated window moldings may be dirty or have rust spots from a Typhoon that recently passed by Hiroshima and Hofu Japan. These vehicles may have been exposed to misty seawater caused by a strong wind and could have potentially sustained chrome molding damage. The vehicles subject to this DRW may need additional cleaning, polishing, or possibly molding replacement.
SA-027-20f2020-11-04. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM; BACK OVER PREVENTION; EQUIPMENT. MAZDA CONNECT SYMPTOM TROUBLESHOOTING (7TH GENERATION VEHICLES). Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure. 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-071-202020-11-04. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Currently, the instructions on MGSS recommend the use of Loctite 962T or equivalent when installing a SKYACTIV cylinder head, but it is no longer available. The following 3 adhesives are alternatives available as an equivalent to Loctite 962T: Loctite 272, Loctite 518 Threebond TB-1386H
SA-070-202020-11-04. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. APPLE CARPLAY / ANDROID AUTO FREQUENTLY ASKED QUESTIONS (FAQ): NOTE: 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
SA-069-202020-11-04. Service bulletin. EQUIPMENT. ACCESSORY INSTRUCTIONS LOCATION: Accessory instructions can be found in the Accessory eCatalog. https://ecatalog.mazdausa.com
SA-031-20f2020-11-04. Service bulletin. ELECTRICAL SYSTEM. CONNECTED VEHICLE SYMPTOM TROUBLESHOOTING: 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 2020 Mazda3 only). Remote function(s) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF
SA-007-20l2020-11-04. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. MAZDA CONNECTED SERVICES - FREQUENTLY ASKED QUESTIONS (FAQ). 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, Dealer Processes, Educational Videos, Resources
09-034-20-37432020-11-04. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Some customers may experience an “In-Vehicle Network Malfunction” message appearing in the instrument cluster. This concern occurs when turning the ignition on or starting the engine when the battery is at 8 volts or lower (vehicle is in sleep mode), then it is charged to normal voltage while connected to the vehicle. NOTE: This concern will not occur if the battery is charged when removed from the vehicle. This concern is caused by improper telematics communication unit control software. To eliminate this concern, the telematics communication unit control software has been modified.
16-001-20-3683c2020-11-03. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE. AUDIO, NAVIGATION AND PHONE CONCERNS WITH MAZDA CONNECT INFOTAINMENT SYSTEM (7TH GENERATION MODELS). Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 7000C0A-NA01_11012 or later). NOTE: Device compatibility can be found at connect.mazda.com - Support - Compatibility.
16-001-20-3683b2020-11-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; ELECTRICAL SYSTEM:SOFTWARE. AUDIO, NAVIGATION AND PHONE CONCERNS WITH MAZDA CONNECT INFOTAINMENT SYSTEM (7TH GENERATION MODELS). Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 7000C0A-NA01_11012 or later). NOTE: Device compatibility can be found at connect.mazda.com - Support - Compatibility. 16-001-20-3683c
SA-060-20c2020-10-05. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. When replacing the Body Control Module (BCM) in a 7th generation vehicle, it needs to be configured and the instructions in the Workshop manual on MGSS are incorrect. Use the instructions in the Repair Procedure below to configure the new BCM.
SA-060-20b2020-10-05. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT ADAPTIVE/MOBILITY. When replacing the Body Control Module (BCM) in a 2019 Mazda3, it needs to be configured and the instructions in the Workshop manual on MGSS are incorrect. Use the instructions in the Repair Procedure below to configure the new BCM.

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