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Service bulletins for the 2018 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.

462 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
09-020-18-34582018-05-14. Service bulletin. EQUIPMENT:ELECTRICAL. Some vehicles may exhibit BLUETOOTH® hands-free and/or text messaging related concerns. To improve the handling of BLUETOOTH® hands-free and/or text messaging customer concerns, Mazda created a special service and parts exchange program as of February 2010. Customers experiencing related concerns should have their vehicle and/or device inspected according to the following procedure.
07-002-18-34322018-05-14. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. A musty/mildew type odor may come from the vents when the air conditioning (A/C) system is operating. It is most noticeable when the A/C is first turned ON. This odor is the result of mold growth in the A/Cevaporator/cooling unit which is caused by condensation, dust, and pollen within the cooling unit. This condition is usually worse during high humidity conditions. "Mazda Air Cooling Coil Coating" is available to encapsulate the mold to reduce odors. If the product is properly applied, it can effectively reduce the musty/mildew odor for up to three years. NOTE: See parts information for Mazda Air Cooling Coil Coating and Kit part numbers. This treatment provides a durable coating that will aid to prevent biological reactions that lead to odorconcerns. It is applied to the evaporator in a misted form that is introduced by way of the cabin air filter, the re-circulate door, the blower motor resistor access, or the blower motor air intake. Proper application requires the evaporator surface to be: Relatively clean and free of leaves, dust build-up and debris. Thoroughly dried, and the product cured onto it after application. NOTE: Keep the cooling unit dry by leaving the blower fan ON (at least on low), even if the A/C is not being used. In low humidity (dry) conditions, keep the ventilation system in the "FRESH" mode all the time, or as much as possible. In high humidity conditions, or if the air has a lot of dust or pollen, keep the system in the "RECIRCULATION" mode. A few minutes before reaching a destination, turn the A/C OFF, but leave the blower fan ON. This stops the accumulation of condensation on the evaporator/cooling unit, and it helps dry the inside of the cooling unit. A/C odor is not unique to Mazda vehicles as it will occur in other makes and models. To minimize A/C odor, suggest the following to the customers.
01-011-18-34562018-05-14. Service bulletin. EQUIPMENT. The vehicles listed above are equipped with a push button start/stop ignition system. Unlike previous Mazdamodels, there is no key cylinder on the steering column. Therefore, the engine cannot be started with theauxiliary key if the room fuse is removed or if the transmitter battery is dead.NOTE: The auxiliary key can only be used to lock or unlock the doors. It cannot be used to start the engine. Two transmitters are placed in a vinyl bag and stored in the center console cup holder. Since the room fuse is not installed during vehicle assembly, a new procedure is required to start the engine. Refer to "Engine Start Procedure" below.
SA-012-182018-05-14. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Some 2018 vehicles built after January 1, 2018 and equipped with Navigation may exhibit one of these concerns after the user inputs an address: A screen pops up that says "House number not found." After the user selects OK, the system finds the address or a nearby address.Instead of finding the correct address number the system adds a digit to the end of the number. Example: You enter 151 and the system comes back with 1510, 1511, 1515, 1516, etc. This only occurs with MAZDA CONNECT software version 59.00.532 or 59.00.540, which started being installed into vehicles in January 2018. The concern can be eliminated by installing MAZDA CONNECT software version 59.00.545 now available on MGSS.
MT-004-182018-04-23. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. If you encounter any type of electrical concern (e.g, dead battery), interview the customer before proceeding with normal Workshop Manual diagnosis. Aftermarket devices may be the cause of the electrical concern. Ask the customer if any aftermarket devices have been installed. Below are a couple of examples of unusual electrical concerns caused by aftermarket devices.
MT-001-182018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL. When installing a navigation SD card, the center display may show error message "Invalid SD Card".
MT-003-182018-04-23. Service bulletin. EQUIPMENT; AIR BAGS. The Workshop Manual has two-different airbag procedures, one for Standard Deployment and one for Two-Step Deployment. Standard Deployment is for Mexico spec vehicles and Two-Step Deployment is for US and Canadian spec vehicles.
SA-009-182018-04-23. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. The navigation SD Card VIN-locks to a vehicle in the following conditions: 1. Vehicle odometer under 62 miles ? VIN-lock occurs with key ON for 3 minutes or longer. 2. Vehicle odometer over 62 miles ? VIN-lock occurs at key ON. Navigation SD Card Map Update Note: Mazda Toolbox navigation SD card map update can only be performed on a navigation SD card that is VIN-locked. See VIN-lock procecure below.
SA-008-182018-04-23. Service bulletin. EQUIPMENT. Some customers may complain about the MAZDA CONNECT center display cracking (spider cracking). The cracks are internal and cannot be felt by touch. This may be caused by a faulty center display.
SA-005-182018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Some customers may complain about SIRIUSXM satellite radio does not show album art, artist biographies or station logos in the center display. This is a normal condition.
09-019-18-34502018-04-23. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. 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. Floor mat moves forward due to improper installation. Inappropriate floor mat (such as aftermarket, non-factory-equipped, or non-genuine) is used. Floor mat is stacked one on top of another. Use these points at your dealership to protect our mutual operations and to help ensure our customers' safety.
00-001-18-34462018-04-23. Service bulletin. EQUIPMENT. Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers.
09-003-18-3405b2018-04-23. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Some customers may complain that the Voice Recognition system does not recognize "Address" or "New Destination" navigation voice commands. This may be caused by faulty navigation SD card software. TheSD card has been updated to eliminate this concern.
09-001-18-33872018-03-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Some customers may experience the MAZDA CONNECT rebooting or the screen turning black during coldtemperatures. The concern occurs when the interior of the vehicle is cold and disappears when the interiorwarms up. This is caused by some for the MAZDA CONNECT navigation system SD cards beingmanufactured with improper hardware, resulting in a data reading error during cold temperatures. To correctthe concern, the SD card hardware has been changed.
MT-021-172018-02-26. Service bulletin. ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Some vehicles may experience the Check Engine Light ON with DTC P0171 (Fuel Trim too Lean) and possibly DTCs P030X (Misfire). Vehicles having this concern should use the following Inspection/Repair procedure.
SA-001-182018-02-26. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. The MAZDA MOBILE START (MMS) is currently experiencing a system disruption. User web portal and Call center web portal functions are affected. Mazda is working on this issue and will notify dealers when MMS service has been fully restored. We apologize for any inconvenience this may have caused you or your dealer.
07-007-17-33842017-10-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Some customers may complain about poor heater performance even after the engine reaches normal operating temperature. This may be caused by a clogged heater unit. For Mazda6 and CX-5, the check engine light may illuminate with the DTC P011A:00 stored at the same time. P011A:00 ECT sensor No.1/No.2 performance problem. NOTE: Refer to TSB 01-015/15 if the customer is using a block heater at temperatures below freezing.
01-008-17-33762017-10-21. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Some vehicles may experience a rough idle with the check engine light on and DTC P0015 / P0524 stored in memory. P0015:00 - Exhaust CMP timing over-retarded. P0524:00 - Engine oil pressure too low. This is caused by a drop in engine oil pressure due to a piece of foreign object stuck on the oil pump pressure relief valve or oil control valve (OCV). The temporary entry of the foreign object triggers a check engine light on, but rough idle will not be produced until a later time.
SA-065-172017-10-04. Service bulletin. EQUIPMENT:ELECTRICAL. Use the symptom troubleshooting tables below to diagnose MAZDA CONNECT concerns. MAZDA CONNECT Symptom Troubleshooting Table Sections: Audio System, Bluetooth®, Center Display, DTC, i-ACTIVESENSE, Maintenance Monitor, Navigation, Noise, Reboot / Frozen Screen / Slow Response, USB / Aux, Voice Command
09-035-17-30802017-10-04. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 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 odometerand 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 ?SpeedometerReplacement 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, a Mazda dealer can get the odometer setting updated to reflect the correct mileage at the time of replacement for both warranty and customer pay repairs, therefore resulting in a higher level of customer satisfaction. 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.
MT-015-172017-08-10. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT ADAPTIVE/MOBILITY. Some customers may complain about the following MAZDA CONNECT Temperature Warning message: Display is too Hot. Screen performance may be decreased until it cools. The warning message displays when the MAZDA CONNECT screen temperature is above 176 degrees Fahrenheit (80 degrees Celsius).
SA-064-172017-08-10. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT ADAPTIVE/MOBILITY. Some customers may complain about one or more warning lights on when they start the vehicle during hot weather. The combination of warning lights mentioned by the customer may include: SCBS, LDWS, HBC. Instrument Cluster Multi-Information Display warning messages may include: Forward Smart City Brake Support Malfunction, Smart Brake System Malfunction, Front Camera Sensor System Malfunction. MAZDA CONNECT center display warning messages may include: High Beam Control [HBC] / Lane-keep Assist System [LAS] Malfunction. Have the vehicle checked by a dealer if this indicator stays On. Smart City Brake Support [SCBS] Malfunction. Have the vehicle checked by a dealer immediately.
SA-063-172017-08-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL. Some customers may complain about the "wrong" phone is connected to the infotainment system. MAZDA CONNECT bluetooth will connect all profiles to devices in order of priority if the last device is not available. This concern may be a normal operation of the CMU connecting to available devices on start up.

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