Mazda Mazda3 Service Bulletins (2024)

250 manufacturer communications on file.

• December 4, 2025•Document ID: 11026906

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY

  Mfr Comm. #:

  09-045-25

  Date Added:

  January 3, 2026

  Manufacturer:

  MAZDA

  Summary

  Some customers may experience that the fuel lid and charge lid do not lock or unlock during door lock/unlock operation. This is caused by: Improper dimensional accuracy of the lid actuator lock mechanism Incomplete control logic in the R-ESU software To eliminate this concern: The mold design of the lid actuator was modified. The control software of the R-ESU was revised.

  Associated Products (18)

  2025 Mazda CX-302025 Mazda CX-502025 Mazda CX-702025 Mazda CX-902025 Mazda Mazda32024 Mazda CX-302024 Mazda CX-502024 Mazda CX-902024 Mazda Mazda32023 Mazda CX-302023 Mazda CX-502023 Mazda Mazda32023 Mazda MX-302022 Mazda CX-302022 Mazda Mazda32022 Mazda MX-302021 Mazda CX-302021 Mazda Mazda3
  Associated Documents

  • DownloadMC-11026906-0001.pdf↗
• November 27, 2025•Document ID: 11026354

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  SA-056-25

  Date Added:

  December 5, 2025

  Manufacturer:

  MAZDA

  Summary

  When inspected, the differential or PTO oil is dark or black. This is considered normal and NO repair should be performed. During production, differential ring and pinion gears receive a manganese phosphate coating (commonly referred to as black oxide). This coating forms a porous, oil-retentive surface that improves boundary lubrication and reduces adhesive wear during initial contact cycles. Designed as a sacrificial layer, it is gradually removed under load throughout the break-in process. As a result, after the first few hundred miles, or at the initial gear oil service interval, the lubricant may appear darkened by the worn-off coating. It will contain trace ferrous particles from the normal run-in of the gear teeth and bearing surfaces. This condition is expected and does not, by itself, indicate an issue with the differential or PTO gears.

  Associated Products (36)

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  Associated Documents

  • DownloadMC-11026354-0001.pdf↗
• November 27, 2025•Document ID: 11026100

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY

  Mfr Comm. #:

  09-043-25

  Date Added:

  December 4, 2025

  Manufacturer:

  MAZDA

  Summary

  Some vehicles may experience a clicking noise when opening and/or closing the front door due to a broken front door checker plate.

  Associated Products (3)

  2026 Mazda Mazda32025 Mazda Mazda32024 Mazda Mazda3
  Associated Documents

  • DownloadMC-11026100-0001.pdf↗
• November 26, 2025•Document ID: 11026353

  Service Bulletin/Repair Instructions
  SERVICE BRAKES

  Mfr Comm. #:

  SA-055-25

  Date Added:

  December 5, 2025

  Manufacturer:

  MAZDA

  Summary

  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. NOTE: Before following this Service Alert repair procedure, ensure published TSBs in MGSS have been completed per model year.

  Associated Products (40)

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  Associated Documents

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• November 23, 2025•Document ID: 11026094

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  05-001-25a

  Date Added:

  December 4, 2025

  Manufacturer:

  MAZDA

  Summary

  Some customers may see the A/T warning light on during (or immediately after) engine start-up with DTCs P073D:00-TCM / P1738:00-TCM stored. P073D:00-TCM: Turbine/input shaft speed sensor: Sensor output range malfunction P1738:00-TCM: Automatic transaxle internal malfunction This concern is caused by improper TCM logic. To eliminate this concern, the TCM control software has been modified to change the DTC detection logic, preventing DTC judgment during start-up.

  Associated Products (6)

  2025 Mazda CX-302025 Mazda Mazda32024 Mazda CX-302024 Mazda Mazda32023 Mazda CX-302023 Mazda Mazda3
  Associated Documents

  • DownloadMC-11026094-0001.pdf↗
• November 20, 2025•Document ID: 11026099

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY; UNKNOWN OR OTHER

  Mfr Comm. #:

  09-042-25

  Date Added:

  December 4, 2025

  Manufacturer:

  MAZDA

  Summary

  Some customers may experience that after the doors are locked and the Fuel Door Lock Delay with MAZDA CONNECT has passed (default setting is 90 seconds), the fuel-filler lid does not lock, but can be opened when pressed. NOTE: The fuel-filler lid does not lock immediately after the doors are locked, but after the time set in the Fuel Door Lock Delay (0, 30, 60, 90, and 120 seconds). Although the root cause has not been identified, the vehicle should be repaired by adjusting the fuel-filler lid opener cable position when there is a customer complaint.

  Associated Products (12)

  2026 Mazda CX-302026 Mazda Mazda32025 Mazda CX-302025 Mazda Mazda32024 Mazda CX-302024 Mazda Mazda32023 Mazda CX-302023 Mazda Mazda32022 Mazda CX-302022 Mazda Mazda32021 Mazda CX-302021 Mazda Mazda3
  Associated Documents

  • DownloadMC-11026099-0001.pdf↗
• November 19, 2025•Document ID: 11026347

  Service Bulletin/Repair Instructions
  WHEELS

  Mfr Comm. #:

  SA-020-25a

  Date Added:

  December 5, 2025

  Manufacturer:

  MAZDA

  Summary

  There have been warranty claims submitted for growling or bearing whine noise in differentials, transfer units and transmissions where the source of the noise was a wheel bearing. This misdiagnosis can lead to multiple repair attempts, warranty debits, and additional inconvenience and/or cost to the customer. To reduce the chance of this occurring, please follow the steps outlined in the repair procedure.

  Associated Products (37)

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  Associated Documents

  • DownloadMC-11026347-0001.pdf↗
• November 18, 2025•Document ID: 11026348

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  SA-040-25a

  Date Added:

  December 5, 2025

  Manufacturer:

  MAZDA

  Summary

  A New Automatic Transmission Fluid (ATF-A7) is being used for some 2023-2026 models. ATF-A7 is an extremely low viscosity formulation with low friction to achieve best-in-class fuel economy and driving performance. For easy identification, ATF-A7 is colored Red and ATF-FZ is colored Blue. ATF-A7 includes UV-reactive dye (see "Fluorescence Example" below). There is NO interchangeability between ATF-A7 and ATF-FZ. For CX-30, Mazda3, and CX-5, some 2.5L and all 2.5T engines still use ATF-FZ. Verify the type of ATF according to what is in MGSS (TRANSMISSION/TRANSAXLE TECHNICAL DATA) or what is marked on the dipstick (see "ATF-A7 Identification" below).

  Associated Products (16)

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  Associated Documents

  • DownloadMC-11026348-0001.pdf↗
• November 8, 2025•Document ID: 11026350

  Service Bulletin/Repair Instructions
  POWER TRAIN; WHEELS; STEERING; SUSPENSION

  Mfr Comm. #:

  SA-051-25

  Date Added:

  December 5, 2025

  Manufacturer:

  MAZDA

  Summary

  Noise, Vibration, and Harshness (NVH) Diagnostic Guidelines Diagnostic Guidelines When diagnosing NVH concerns, it is essential to first classify the issue into one of three primary categories: Noise, Vibration, or Harshness. Many customer complaints may involve overlapping symptoms, such as both noise and vibration, so identifying the dominant characteristic is critical. Once the primary symptom is determined, follow the appropriate diagnostic path. For example, if a concern includes both noise and vibration but is related to vehicle speed, the vibration diagnostic path should be followed. When considering component replacement during the diagnostic process, it is best practice to start with the lowest cost or most accessible part unless diagnostic evidence clearly identifies a more expensive or complex component as the root cause. This approach helps minimize repair costs and avoids unnecessary part replacements. For example, a growling or bearing whine noise may be mistakenly attributed to internal components in the differential, transfer unit, or transmission, when the actual source is a wheel bearing. Misdiagnosis like this can lead to unnecessary repairs, added time and cost. To help prevent this, always follow the guidelines in the repair procedure.

  Associated Products (39)

  2026 Mazda CX-302026 Mazda CX-502026 Mazda CX-702026 Mazda CX-902026 Mazda Mazda32026 Mazda MX-52025 Mazda CX-302025 Mazda CX-52025 Mazda CX-502025 Mazda CX-702025 Mazda CX-902025 Mazda Mazda32025 Mazda MX-52024 Mazda CX-302024 Mazda CX-52024 Mazda CX-502024 Mazda CX-902024 Mazda Mazda32024 Mazda MX-52023 Mazda CX-30+ 19 more
  Associated Documents

  • DownloadMC-11026350-0001.pdf↗
• November 6, 2025•Document ID: 11026351

  Service Bulletin/Repair Instructions
  POWER TRAIN; ENGINE

  Mfr Comm. #:

  SA-052-25

  Date Added:

  December 5, 2025

  Manufacturer:

  MAZDA

  Summary

  Some customer's might state that they notice fluid or oil leaking/dripping on the ground when the vehicle is parked. For this concern, inspect the vehicle for any trace of a fluid or oil leak and use the following examples as a guide to determine if it is severe enough to require a repair, or just to clean the area and monitor it at the next service. Examples of residue or seepage that may not be considered a leak and that may not require repair based on splash shield inspection.

  Associated Products (37)

  2026 Mazda CX-302026 Mazda CX-502026 Mazda CX-702026 Mazda CX-902026 Mazda Mazda32026 Mazda MX-52025 Mazda CX-302025 Mazda CX-52025 Mazda CX-502025 Mazda CX-702025 Mazda CX-902025 Mazda Mazda32025 Mazda MX-52024 Mazda CX-302024 Mazda CX-52024 Mazda CX-502024 Mazda CX-902024 Mazda Mazda32024 Mazda MX-52023 Mazda CX-30+ 17 more
  Associated Documents

  • DownloadMC-11026351-0001.pdf↗
• October 31, 2025•Document ID: 11024989

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY

  Mfr Comm. #:

  09-034-25a

  Date Added:

  November 5, 2025

  Manufacturer:

  MAZDA

  Summary

  Some customers may notice water in the trunk after a car wash or heavy rain. This may be caused by insufficient sealing performance of the trunk lid weatherstrip. Due to improper installation of weatherstrips, the lip of the weatherstrip may lean toward the inside of the trunk, resulting in insufficient sealing performance. To eliminate this concern, the length of the trunk lid weatherstrip has been extended 14 mm {0.5 in.}.

  Associated Products (6)

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  Associated Documents

  • DownloadMC-11024989-0001.pdf↗
• October 23, 2025•Document ID: 11024994

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  SA-007-25b

  Date Added:

  November 5, 2025

  Manufacturer:

  MAZDA

  Summary

  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. NOTE: A Warranty Code is required for warranty claim submission Battery Identification (Mazda batteries have 2 rating types) 1. JIS (Japanese Industrial Standard): JIS codes are six-digit alpha-numeric markings (excluding i-STOP batteries e.g. Q-85, S-95) molded into the top of the battery to identify a battery by the capacity (amps), dimensions, and battery terminal type. Vehicles manufactured in Japan come from the factory with a JIS rated battery. NOTE: Replacement batteries may use a CCA rating. If so, use the CCA rating listed on the battery.

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  Associated Documents

  • DownloadMC-11024994-0001.pdf↗
• October 17, 2025•Document ID: 11024997

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  SA-029-25a

  Date Added:

  November 5, 2025

  Manufacturer:

  MAZDA

  Summary

  This service information provides testing and charging procedures in order to promote proper battery maintenance, to deliver new vehicles with fully charged batteries, and to reduce unnecessary battery replacement cost. For new vehicles in stock at the dealer, inspect and maintain the batteries periodically according to the repair procedure.

  Associated Products (26)

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  Associated Documents

  • DownloadMC-11024997-0001.pdf↗
• October 17, 2025•Document ID: 11024995

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY

  Mfr Comm. #:

  SA-011-25a

  Date Added:

  November 5, 2025

  Manufacturer:

  MAZDA

  Summary

  Some customers will report that their fuel door (AKA, fuel filler door, fuel lid, and fuel-filler lid) was stuck closed and would not open to refuel the vehicle. Follow the repair steps below unless the conditions outlined in TSB 09-007/25 - FUEL-FILLER LID PANEL IS DEFORMED for 2019-2025 Mazda3 and 2020-2025 CX-30 are present.

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  Associated Documents

  • DownloadMC-11024995-0001.pdf↗
• October 8, 2025•Document ID: 11025009

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; UNKNOWN OR OTHER

  Mfr Comm. #:

  SA-047-25

  Date Added:

  November 5, 2025

  Manufacturer:

  MAZDA

  Summary

  When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated.

  Associated Products (33)

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  Associated Documents

  • DownloadMC-11025009-0001.pdf↗
• October 7, 2025•Document ID: 11024996

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  SA-012-25c

  Date Added:

  November 5, 2025

  Manufacturer:

  MAZDA

  Summary

  Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.

  Associated Products (34)

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  Associated Documents

  • DownloadMC-11024996-0001.pdf↗
• October 2, 2025•Document ID: 11024999

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  SA-044-25

  Date Added:

  November 5, 2025

  Manufacturer:

  MAZDA

  Summary

  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 known good terminal. To measure the voltage/resistance avoiding any terminal damage.

  Associated Products (39)

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  Associated Documents

  • DownloadMC-11024999-0001.pdf↗
• September 30, 2025•Document ID: 11023703

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  SA-043-25

  Date Added:

  October 3, 2025

  Manufacturer:

  MAZDA

  Summary

  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 built on or before March 2, 2019] No DTC - Warning Message only [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.

  Associated Products (39)

  2026 Mazda CX-302026 Mazda CX-502026 Mazda CX-702026 Mazda CX-902026 Mazda Mazda32026 Mazda MX-52025 Mazda CX-302025 Mazda CX-52025 Mazda CX-502025 Mazda CX-702025 Mazda CX-902025 Mazda Mazda32025 Mazda MX-52024 Mazda CX-302024 Mazda CX-52024 Mazda CX-502024 Mazda CX-902024 Mazda Mazda32024 Mazda MX-52023 Mazda CX-30+ 19 more
  Associated Documents

  • DownloadMC-11023703-0001.pdf↗
• September 30, 2025•Document ID: 11023702

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  SA-042-25

  Date Added:

  October 3, 2025

  Manufacturer:

  MAZDA

  Summary

  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.

  Associated Products (39)

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  Associated Documents

  • DownloadMC-11023702-0001.pdf↗
• September 9, 2025•Document ID: 11023700

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; UNKNOWN OR OTHER

  Mfr Comm. #:

  SA-017-25c

  Date Added:

  October 3, 2025

  Manufacturer:

  MAZDA

  Summary

  Mazda Connected Services - Frequently Asked Questions

  Associated Products (34)

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  Associated Documents

  • DownloadMC-11023700-0001.pdf↗