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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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Bulletins, newest first
02-005-18-34442018-04-23. Service bulletin. SUSPENSION. Beginning with the CX-5, grip type front and rear stabilizer bushings have been incorporated for noise prevention purposes. If any type of grease or lubrication is applied to the bushings, it may create noise due to bushing slippage.
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.
09-015-18-34452018-04-23. 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.
09-010-18-34402018-04-23. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 59.00.504 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.
01-006-18-34292018-04-23. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. When the engine is started for the first time after parking the vehicle overnight in cold conditions (below 32 degrees Fahrenheit / 0 degrees Celsius), some vehicles may exhibit a rough idle and/or the check engine light on with any of the following DTC(s) stored in memory. P0300 - Random misfire detected P0301 - Cylinder No.1 misfire detected P0302 - Cylinder No.2 misfire detected P0303 - Cylinder No.3 misfire detected P0304 - Cylinder No.4 misfire detected. This may be caused by frozen water accumulated in the main silencer, restricting exhaust flow.
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.
09-005-18-34142018-03-05. Service bulletin. SEATS:FRONT ASSEMBLY:POWER ADJUST. Some vehicles may exhibit excessive operating noise when sliding the driver and/or passenger power seat(s) back and forth. The noise may be caused by cable vibration, which transmits power from the motor to the gears. The cable vibrates inside the cable casing due to inadequately wrapped fabric around the cable. To eliminate this concern, the power seat cable has been changed to a type that produces less friction and noise.
09-003-18-3405a2018-03-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. 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. The SD card has been updated to eliminate this concern.
09-003-18-34052018-03-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Some customers may complain that the Voice Recognition system does not recognize "Address" or "NewDestination" 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.
02-001-18-3013h2018-03-05. Service bulletin. SUSPENSION. Some vehicles may exhibit one or more of the following noises from the front suspension. A squeaking noise from the front shock absorber when turning the steering wheel at a vehicle standstill caused by stick-slip between the front strut bearing and the coil spring. A popping noise from the front shock absorber when passing over speed bumps caused by the bump stopper contacting the strut bearing when the shock absorber is compressed. A creaking noise from the lower arm when driving over road bumps at 20-40 km/h caused by stick- slip of the front lower arm bushing. The noise occurs when the road surface is wet or after a car washing, and becomes more noticeable as the speed bump gets higher. To correct these problems, the following changes have been made. For the squeaking and popping noise, the shape of the bump stopper has been modified and a protector has been installed onto the coil spring. For the creaking noise, the friction of the lower arm bushing has been reduced by adding a dry coating.
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.
MT-001-182018-02-26. Service bulletin. ELECTRICAL SYSTEM. When installing a navigation SD card, the center display may show error message "Invalid SD Card". This may be caused by: The navigation SD card lock tab is locked.The navigation SD card has a VIN mismatch due to SD card swapping.The navigation SD card has a malfunction.
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.
SA-074-172018-02-26. Service bulletin. ELECTRICAL SYSTEM. If the BSM control module is replaced, Auto Configuration and BSM Radar Test must be performed: 1. Auto Configuration -When the ignition is switched ON, the blind spot monitoring (BSM) reads the vehicle specification information sent via CAN communication from the instrument cluster, and stores the vehicle specification information into the new BSM control module. 2. BSM Radar Test - This test confirms correct BSM module/bracket alignment. The Workshop Manual "BLIND SPOT MONITORING (BSM) RADAR TEST" is incorrect. Mazda is in the process of correcting the error. Perform the following procedure temporarily until the Workshop Manual is corrected:
15-006-17-3388a2018-02-26. Service bulletin. ELECTRICAL SYSTEM. Some customers may complain about one or more warning lights ON when they start the vehicle during hot weather. The following DTCs are stored in memory: U3000:98 - Forward sensing camera (FSC) stops functioning due to temporary high temperature. U3000:04 - Forward sensing camera (FSC) internal malfunction. The combination of warning lights mentioned by the customer may include: SCBS/SBS, LAS/LDWS, HBC, Master Warning LightInstrument Cluster Multi-Information Display (if equipped) 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. Note: The center display Warning Messages are only displayed when the customer selects Applications>Vehicle Status Monitor>Warning Guidance>Warnings. This condition may be caused by FSC control logic that is too sensitive. When the FSC detects DTCU3000:98 during high temperature, it stops the internal communication and stores DTC U3000:04. DTC U3000:04 will not clear and SCBS/SBS, LAS/LDWS, and/or HBC functions will not resume until the ignition switch has been turned OFF, even if the temperature of the FSC cools. Before FSC Reprogramming: The warning lights/messages will be displayed until the FSC cools and the ignition is turned OFF, then back ON. Instrument Instrument Cluster Warning Lights and MAZDA CONNECT Warning Messages Cluster Warning Messages Warning Lights (With Multi-Information Display) (Without Multi-Information Display), Note: These Warning Messages are displayed when the customer selects Applications>Vehicle Status Monitor>Warning Guidance>Warnings.
MT-016-172017-12-14. Service bulletin. FORWARD COLLISION AVOIDANCE: SENSING SYSTEM. The Smart City Brake Support (SCBS) system alerts the driver of a possible collision using an indication in the display and a warning sound when the Forward Sensing Camera (FSC) detects a vehicle ahead and determines that a collision with a vehicle ahead is imminent. In addition, the system reduces damage in the event of a collision by operating the brake control when the system determines that a collision is unavoidable. It may also be possible to avoid a collision depending on the relative speed between your vehicle and the vehicle in front of you. In addition, when the driver depresses the brake pedal, the brakes are applied firmly and quickly to assist.
15-006-17-33882017-11-14. Service bulletin. BACK OVER PREVENTION: CAMERA SYSTEM; ELECTRICAL SYSTEM; SERVICE BRAKES. Some customers may complain about one or more warning lights ON when they start the vehicle during hot weather. The following DTCs are stored in memory: U3000:98 - Forward sensing camera (FSC) stops functioning due to temporary high temperature. U3000:04 - Forward sensing camera (FSC) internal malfunction. The combination of warning lights mentioned by the customer may include: Instrument Cluster Multi-Information Display (if equipped) 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. Note: The center display Warning Messages are only displayed when the customer selects Applications>Vehicle Status Monitor>Warning Guidance>Warnings. This condition may be caused by FSC control logic that is too sensitive. When the FSC detects DTC U3000:98 during high temperature, it stops the internal communication and stores DTC U3000:04. DTC U3000:04 will not clear and SCBS/SBS, LAS/LDWS, and/or HBC functions will not resume until the ignition switch has been turned OFF even if the temperature of the FSC cools.
05-003-17-33892017-11-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); SERVICE BRAKES. Some customers who drive at elevations higher than 3,300 ft (1,000 m) may complain of a shift shock felt when shifting into 3rd, 5th and/or Reverse with no AT related DTCs stored. The symptom can be temporarily repaired using the AT initial learning procedure, but may recur after multiple driving cycles. Applicable situations: Shifting up: 2-3 or 4-5, Shifting down: 4-3 or 6-5, NOTE: Shifting from 2-3 or 4-3 is more likely to be felt due to the gear ratio. Shifting into Reverse: D-R, N-Ror P-R, Improper control logic of the TCM may cause improper learning of R-3-5 brake engaging speed when the vehicle is driven at high elevations. To correct this issue, the control logic of the TCM has been modified.
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.
09-017-17-3347b2017-10-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. All Mazda Connect vehicles in new car inventory must be updated to this 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 59.00.502 or later). NOTE: For 2016 CX-9 with version earlier than 59.00.441, the tachometer function will 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.
SA-064-172017-10-04. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING. 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-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
09-017-17-3347c2017-10-04. Service bulletin. ELECTRICAL SYSTEM. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 59.00.502 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.

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