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.
By type
By component
By trouble code
By topic
| 05-005-23 | 2023-11-01. Service bulletin. POWER TRAIN. 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. |
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| SA-039-23a | 2023-10-05. Service bulletin. STRUCTURE; VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Some vehicles may experience exterior trim heat damage when parked near a glass building or Low-E windows. This may be caused by the sun's reflection. |
| SA-003-23a | 2023-10-05. Service bulletin. SERVICE BRAKES. 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-050-23 | 2023-09-05. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Some customers may complain about scratches on the instrument cluster lens. |
| SA-037-23a | 2023-09-03. Service bulletin. ENGINE AND ENGINE COOLING. 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. Hotline and MASH authorization is not required to order parts for performing this repair. If there are any questions on part ordering or part status, contact the DAG group for assistance. |
| SA-039-23 | 2023-08-05. Service bulletin. STRUCTURE. Some vehicles may experience exterior trim heat damage when parked near a glass building or Low-E windows. This may be caused by the sun's reflection. |
| SA-044-23 | 2023-08-05. Service bulletin. SUSPENSION. Some customers have reported experiencing a one-time popping or clunking sound while driving their vehicle. The noise is most noticeable when duplicating the driving conditions of going up or down an incline while simultaneously making a turn. NOTE: For Mazda6 vehicles, the noise may only be heard once per day. To reproduce the concern, allow the vehicle to sit overnight and then drive it. The noise has been traced to the front stabilizer (sway bar) bushings and the recommended action is the following repair information (if the noise can be duplicated). NOTE: The repair itself is not complex, but accurately replicating the concern may require additional time. To minimize inconvenience to the customer, ensure that they are provided with a loaner vehicle while the diagnosis and repair take place. |
| SA-037-23 | 2023-07-05. Service bulletin. ENGINE AND ENGINE COOLING. 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. Hotline and MASH authorization is not required to order parts for performing this repair. If there are any questions on part ordering or part status, contact the DAG group for assistance. |
| SA-036-23 | 2023-07-05. Service bulletin. STRUCTURE; EQUIPMENT. Interior parts made of resin have antistatic coating to prevent dust from sticking on the surfaces, and depending on the conditions of use, the antistatic components may crystallize slightly, giving an appearance of white stains on the surface. To remove the stains, wipe the stained surface with a towel soaked with water mixed with a small portion of a neutral detergent. If the white stains reappear again, simply wipe them again in the same way. NOTE: The antistatic effect does not deteriorate with this procedure. |
| SA-035-23 | 2023-07-05. Service bulletin. ENGINE AND ENGINE COOLING. Some customers may complain of a lack of power under heavy load without any warning lights or DTCs. This concern may be due to a loose or detached hood weatherstrip, which can cause a blockage or restriction in the air intake system. |
| 09-007-23b | 2023-07-05. 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. |
| 05-003-23 | 2023-07-05. Service bulletin. POWER TRAIN. Some customers may complain of a shift shock felt when shifting into 3rd, 5th and/or R range with no A/T related DTC stored. The symptom can be temporarily repaired by A/T initial learning procedure, but may recur after multiple driving cycles. |
| 01-008-23 | 2023-07-05. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may exhibit oil leakage from the drive belt auto tensioner and rattling noises from the engine compartment. This may be caused by insufficient sealing at the drive belt auto tensioner damper when the auto tensioner fully operates under both high ambient temperature and high load conditions. To eliminate this concern, the shape of the drive belt auto tensioner damper has been changed. |
| SA-033-23 | 2023-06-04. Service bulletin. ELECTRICAL SYSTEM. Use the symptom troubleshooting tables below to diagnose MAZDA CONNECT concerns. |
| SA-032-23 | 2023-06-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND 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. |
| SA-031-23 | 2023-06-04. Service bulletin. WHEELS. 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. |
| 05-002-23 | 2023-06-04. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Some vehicles may experience the check engine light and automatic transaxle warning light ON with one or more of these DTCs stored in the TCM memory (P0842, P0847, P0872, P0877, P0780, P1738). |
| 01-007-23 | 2023-06-04. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; 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. |
| 09-007-23a | 2023-05-03. 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. |
| 06-001-23a | 2023-05-03. Service bulletin. STEERING. Some vehicles may exhibit wear/peel-off of the leather steering wheel surface causing a poor appearance. This concern may be caused by an insufficient wear resistance of the steering wheel surface. |
| 01-006-23 | 2023-05-03. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may exhibit oil seepage or oil leak onto the engine front cover, which becomes more apparent with dust adhesion. |
| SA-012-23 | 2023-04-04. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; VISIBILITY. Some customers may report an odor or water in the HVAC system and upon inspection, the cabin air filter may be found to be wet. |
| SA-016-23 | 2023-04-04. Service bulletin. EQUIPMENT:ELECTRICAL. There are currently 2 methods for cutting a new auxiliary key blank. A. Auxiliary Key Trace Cut Method. B. Auxiliary Key Code Cut Method |
| 09-007-23 | 2023-03-04. 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. |
| 09-008-23 | 2023-03-04. Service bulletin. SEATS; ELECTRICAL SYSTEM. Some vehicles may experience the seat ventilation system still on after the engine has been turned off, in some cases this causes the battery to be completely discharged and not rechargeable. This is caused by a deterioration in the seat ventilation control unit. To eliminate this concern, the material for the circuit of the seat ventilation control unit has been modified. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.