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Service bulletins for the 2020 Mazda Mazda6

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.

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

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Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
01-003/222022-04-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. 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.
SA-001/222022-02-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ELECTRICAL SYSTEM; BACK OVER PREVENTION. Symptom troubleshooting tables to diagnose MAZDA CONNECT concerns. 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 Other Symptoms No. 12 How to update the Navigation SD Card Map No. 13 How to Check Navi SD Card VIN Lock
09-012-21-3801b2022-01-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Door Lock Will Not Work Using Remote Transmitter and Engine Will Not Start: Some customers may experience all of following symptoms: 1. The door lock/unlock operation will not work using the remote transmitter button. 2. The door lock/unlock operation will not work using the door lock/release touch sensor. 3. The engine will not start using the ignition switch. 4. The transmitter operates by itself. 5. The key battery drains faster than usual. Symptoms 1-3: This may be caused when excess load is applied to the remote transmitter, deforming the electrical terminals and creating poor contact with the battery. To eliminate this concern, the structure in the remote transmitter has been modified to reduce the deformation of the electrical terminals. Symptom 4-5: This may be caused when excessive load is applied to the remote transmitter, creating a gap around the gasket where moisture enters and corrodes the circuit board which in turn drains the key battery faster than usual. To eliminate this concern, the thickness of the case wall on the gasket mounting surface has been increased and the bonding strength of the components has been improved to prevent deformation. Customers having this concern should have their vehicle repaired using the following repair procedure.
SA-019-21e2021-12-02. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. MAZDA CONNECT SYMPTOM TROUBLESHOOTING [6TH GENERATION VEHICLES]. Use the symptom troubleshooting tables below to diagnose MAZDA CONNECT concerns
SA-052-212021-12-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. For improvement of electrical diagnosis, the SKYACTIV® Wiring Terminal Test Kits has been delivered all the dealers. The terminal test kit enables you: To check pin fit drag of all PCM terminals used in SKYACTIV® vehicles and compare suspect terminal drag with a good know terminal.To measure the voltage/resistance avoiding any terminal damage.
15-004-21-38352021-12-02. Service bulletin. FORWARD COLLISION AVOIDANCE; EQUIPMENT ADAPTIVE/MOBILITY. NOTE: This Service Information is only applicable for vehicles equipped with a Forward Sensing Camera (FSC), KDD1-67-XCX and GSH7-67-XCX*. If B61L-67-XCX* appears in the GEPC search, the VIN is applicable for this repair only if the part has been previously replaced with KDD1-67-XCX. Some vehicles may exhibit the master warning light (and other warning lights) illuminated while driving, with DTC B115E:76 stored in memory.
SA-031-21c2021-11-01. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. 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. There is no longer a need to contact hotline for part ordering. If there are any questions on part ordering or part status, contact the DAG group for assistance.
SA-031-21b2021-11-01. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN; EQUIPMENT. 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.
01-013-21-37532021-10-31. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Some vehicles may have coolant leaks at the cylinder head around the exhaust manifold (as shown below). There may be cracks at the stud bolt hole (1) or at the outside of the exhaust manifold (2). Cracks may be caused by: Deformation of the exhaust manifold during usage causing unexpected force to certain areas of the cylinder head. Residual stress generated during production in the cylinder head material may be greater than expected. The external force from the exhaust system when driving over bumps may cause unexpected force to certain areas of the cylinder head. To eliminate this concern, the design of the exhaust manifold gasket and the cylinder head has been modified to reduce the force on the cylinder head.
SA-019-21d2021-10-05. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. MAZDA CONNECT SYMPTOM TROUBLESHOOTING [6TH GENERATION VEHICLES]. Use the symptom troubleshooting tables below to diagnose MAZDA CONNECT concerns.
MT-002-212021-10-02. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Ethanol is becoming a common additive in gasoline. Gasoline containing ethanol is likely available at your local gasoline station. Typical blends of ethanol include E10 and E85. E10: A blend of 10% ethanol and 90% gasoline, E85: A blend of 85% ethanol and 15% gasoline, All Mazda vehicles can run on gasoline containing up to 10% ethanol (E10) but only some 1999-2001 B3000 trucks can run on gasoline with more than 10% ethanol blended. E10 compatible vehicles: All Mazda vehicles. E85 compatible vehicles: 1999-2001 B3000 Mazda trucks with the 8th VIN digit is V. What if a customer puts E85 in there Mazda vehicle? Symptoms include: Rough Running, Lean Codes, Misfires and/or misfire codes, Lack of power, Poor fuel economy, Spark knock, Mechanical engine damage.
09-021-21-3818b2021-10-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. All Mazda Connect vehicles in new car inventory must be updated to the software version listed below in this TSB as part of the New Car Ready Step 3 process. Make sure the new vehicle specialist receives a copy of this bulletin. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 74.00.230 or later). NOTE: For 2016 CX-9 with version earlier than 59.00.441, the tachometer function will be removed from the Active Driving Display as part of Mazda’s continuing efforts to improve safety and reduce driver distraction. Please explain this to the customer before updating the software. If the customer agrees, turn off the tachometer display on the AD-Display tab in MAZDA CONNECT Settings before performing the update. NOTE: If the customer has customized MAZDA CONNECT with something like a different background using unauthorized software, make sure they know the following information before updating MAZDA CONNECT to avoid any issues later on. Updating MAZDA CONNECT to the latest version will erase any customization created by unauthorized software. Unauthorized customization software will not work on the latest version of MAZDA CONNECT software. The latest version of MAZDA CONNECT software cannot be rolled back to an earlier version. Mazda does not recommend unauthorized customization of MAZDA CONNECT due to the possibility of unexpected problems. Any issues related to this will not be covered under Mazda warranty policy.
07-003-21-38252021-10-02. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. Some vehicles may exhibit a squeaking noise from the blower motor while it is operating. This is caused by burrs that were not trimmed completely in the manufacturing process of the blower motor. To eliminate this concern, the manufacturing process of the blower motor has been modified to efficiently trim burrs.
01-011-21-3800a2021-10-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE 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. NOTE: Vehicles with SKYACTIV-G 2.5T are not applicable. Due to production variety of the failsafe thermostat integrated in the coolant control valve, engine coolant may enter into a dry hollow in the failsafe thermostat, resulting in unintended opening of the failsafe thermostat at lower temperatures (104-176 °F (40-80 °C)). To eliminate this concern, the production process of the coolant control valve has been modified.
SA-046-212021-09-03. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Some customers may complain about incorrect MAZDA CONNECT clock time. This may be caused by an incorrect clock GPS Sync setting.
09-021-21-3818a2021-08-24. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT. AUDIO, NAVIGATION AND PHONE CONCERNS WITH MAZDA CONNECT INFOTAINMENT SYSTEM (6TH GENERATION). All Mazda Connect vehicles in new car inventory must be updated to the software version listed below in this TSB as part of the New Car Ready Step 3 process. Make sure the new vehicle specialist receives a copy of this bulletin. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 70.00.367 or later). NOTE: For 2016 CX-9 with version earlier than 59.00.441, the tachometer function will be removed from the Active Driving Display as part of Mazdas continuing efforts to improve safety and reduce driver distraction.
09-025-21-38242021-08-24. Service bulletin. EQUIPMENT. This service bulletin provides information regarding the proper use of the driver’s floor mat to avoid any potential interference with the foot pedals. The following are possible causes of floor mat interference, which can be avoided with proper usage.
15-002-21-38122021-08-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. Some customers may experience a SBS/SCBS, LAS/LDWS and/or HBC warning light on. A system error message may also be found in the center display. DTC U3000:04-0A (Forward sensing camera (FSC) internal malfunction). DTC U3000:04-0A (Forward sensing camera (FSC) internal malfunction) is stored in the FSC module and cannot be erased. This concern may be caused by a hardware failure of an internal device of the FSC, which results in a malfunction detection. To eliminate this concern, the production process of the FSC has been modified.
09-021-21-38182021-08-03. Service bulletin. EQUIPMENT. AUDIO, NAVIGATION AND PHONE CONCERNS WITH MAZDA CONNECT INFOTAINMENT SYSTEM (6TH GENERATION). All Mazda Connect vehicles in new car inventory must be updated to the software version listed below in this TSB as part of the New Car Ready Step 3 process. Make sure the new vehicle specialist receives a copy of this bulletin. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 70.00.367 or later). NOTE: For 2016 CX-9 with version earlier than 59.00.441, the tachometer function will be removed from the Active Driving Display as part of Mazda’s continuing efforts to improve safety and reduce driver distraction.
SA-019-21a2021-07-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. MAZDA CONNECT SYMPTOM TROUBLESHOOTING [6TH GENERATION VEHICLES]. Use the symptom troubleshooting tables below to diagnose MAZDA CONNECT concerns.
SA-029-21a2021-07-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. APPLE CARPLAY / ANDRID AURO FREQUENTLY ASKED QUESTIONS (FAQ) 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-030-21a2021-07-02. Service bulletin. EQUIPMENT. There are currently 2 methods for cutting a new auxiliary key blank. A. Auxiliary Key Trace Cut Method B. Auxiliary Key Code Cut Method A. Auxiliary Key Trace Cut Method If only one auxiliary key is lost/missing, some key cutting machines can trace cut a new key blank. 1. Trace cut the new auxiliary key blank(s). B. Auxiliary Key Code Cut Method If both auxiliary keys are lost/missing, use this method for cutting new auxiliary key blank(s). 1. Confirm you have access to a Mazda approved key cutting machine. See “Mazda Approved Key Cutting Machine” table.
SA-041-212021-07-01. Service bulletin. EQUIPMENT. Accessory instructions can be found on OneMazda under Dealer Resources - Parts & Accessories. The links provided below can be used for quick access: For 2016 models and newer: NOTE: Instructions are found under the "Attachments" section once a part is selected. Accessories E-catalog For models prior to 2016: Accessory Parts and Installation Instructions
SA-034-212021-06-03. Service bulletin. EQUIPMENT. When performing vehicle services such as control unit software update, control unit registration/activation, CMU log data retrieval, etc., always use the DCA8000 OR GR8 battery charger SST to maintain battery voltage.
SA-036-212021-06-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; LANE DEPARTURE; EXTERIOR LIGHTING; FORWARD COLLISION AVOIDANCE. Some vehicles may have one of the following DTCs stored in memory along with a system status notice on the Multi-information display OR display a system status notice with no DTC: C1001:92 - Forward sensing camera (FSC) poor field of view [Gen 6 vehicles], B14F0:92 - General temporary failure in forward sensing camera (FSC) [Gen 7 vehicles build on or before March 2, 2019], No DTC - Gen 7 vehicles built after March 2, 2019, 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 the Lane Departure Warning System (LDWS) and/or High Beam Control system (HBC). In other cases this DTC might be found without a related customer concern.

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