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Service bulletins for the 2019 Mazda CX-3

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.

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

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By component

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Bulletins, newest first
SA-044-182018-10-09. Service bulletin. EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES. Some customers may complain about the Panic Alarm system activating while driving with the following results: The alarm stops when cycling the ignition OFF and then back ON. No DTCs are stored. Contact Hotline for the latest repair information.
09-035-18-35092018-10-09. Service bulletin. ELECTRICAL SYSTEM. Some customers may experience one or more electrical malfunctions after a vehicle body repair. The newly painted fender stay (2) may be causing a poor front harness (1) ground connection.
02-014-18-35032018-10-09. Service bulletin. SUSPENSION:FRONT:SHOCK ABSORBER. Some vehicles may experience a creaking noise from the front shock absorber when going over bumps. Upon inspection, the coil spring is found to be broken at the lower part without any trace of an accident. It may be found during maintenance or service opportunity without customer complaints. Mud and sand caught between the coil spring and the lower spring seat causes paint damage on the coil spring, resulting in rust holes and uneven force application. To correct this issue, the shape of the lower spring seat has been modified.
MT-008-182018-10-09. Service bulletin. ENGINE; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Some customers may complain about: Intermittent engine no start, Instrument cluster red security indicator light ON, Engine Start/Start Button Amber indicator, light flashing, Battery discharge, Electrical relay buzzing noise.This may be caused by: A key in a purse near a cell phone. The cell phone radio waves may interrupt the immobilizer system. An aftermarket cell phone charger. The charger may produce electrical noise that interrupts the immobilizer system. An aftermarket GPS tracker. Some aftermarket devices that are wired to the vehicles?s wiring harness may create unusual electrical symptoms.
MT-007-182018-10-09. Service bulletin. ELECTRICAL SYSTEM. Some customers may complain about the following: Engine no start. A blurry rear view monitor display. This may be caused by an aftermarket accessory device. Some aftermarket electrical devices (e.g., an accessory cell phone charger, GPS tracker...) may create excessive electrical noise. The noise may interrupt some of the vehicle electrical systems. Below are a few examples of an aftermarket cell phone charger and GPS tracker that are interrupting the vehicle electrical systems.
MT-004-182018-10-09. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; EQUIPMENT. 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 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.
SA-040-182018-09-10. Service bulletin. ENGINE. Some vehicles may experience a check engine light on and/or failsafe with DTC P061B:00 stored in the PCM. This condition will likely occur as a result of one of the following causes: Engine cranking was interrupted by releasing the brake pedal. Start button was double pressed while the engine was still cranking. A countermeasure to correct mis-detection is currently being prepared.
SA-037-182018-09-10. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. Service part Automatic Transaxles (ATX) manufactured on or after July, 2018 are shipped with a blank TCM that requires configuration.
09-034-18-34302018-09-10. Service bulletin. VEHICLE SPEED CONTROL. 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 odometer and 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 "Speedometer Replacement 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, it is possible that the odometer will be set between 10 to 31 miles over the odometer mileage at the time of replacement for both warranty and customer pay repairs. Please make sure that the customer is aware that there may be a slight variance to the odometer, in which case the customer may have to accept the slightly higher mileage. 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.
00-004-18-35152018-09-10. Service bulletin. LANE DEPARTURE. In support of the new Mazda MX-5 and CX-3, Mazda will make available for loan on a "as-needed" basis, a Special Service Tool (SST) to allow for the radar aiming of the blind spot monitoring (BSM) system. The(BSM) radar aiming is performed whenever the (BSM) control module, the (BSM) bracket or the rear bumper is replaced. The tool is available for loan by contacting DAG.
MT-008-182018-08-27. Service bulletin. EQUIPMENT:ELECTRICAL; ENGINE. ENGINE NO START (KEY NOT DETECTED): Some customers may complain about the following: Intermittent engine no start, Instrument cluster red security indicator light ON, Engine Start/Start Button Amber indicator light flashing.
MT-007-182018-08-27. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES; ENGINE; ELECTRICAL SYSTEM. ENGINE NO START AND / OR REAR VIEW MONITOR DISPLAY IS BLURRY DUE TO AFTERMARKET ELECTRICAL DEVICE: Some customers may complain about the following: Engine no start. A blurry rear view monitor display. This may be caused by an aftermarket accessory device. Some aftermarket electrical devices (e.g., an accessory cell phone charger) may create excessive electrical noise. The noise may interrupt some of the vehicle electrical systems. Below are a few examples of an aftermarket cell phone charger that is interrupting the vehicle electrical systems.
MT-004-182018-08-27. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. ELECTRICAL CONCERN AND/OR MULTIPLE DTC'S DUE TO AFTERMARKET DEVICE: 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 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.
SA-036-182018-08-20. Service bulletin. ELECTRICAL SYSTEM. MAZDA MOBILE START (MMS) APP ERROR MESSAGE INSTALLED ON ANDROID DEVICES: Customers may get an error message "Device no longer has access or service." for the MMS APP installed on android devices starting 8/1/18. Inform the customer that all they need to do is update the MMS APP to the latest version to get rid of the error message.
SA-035-182018-08-20. Service bulletin. ELECTRICAL SYSTEM. MAZDA MOBILE START (MMS) UPDATE INSTRUCTIONS: The current installation instructions for Mazda Mobile Start (MMS) on a 2019 CX-3 are incorrect when inserting the hood switch wire into the C-01 connector. Use the attached supplement sheet when installing the hood switch wire into the C-01 connector.
SA-034-182018-08-20. Service bulletin. EQUIPMENT. MAZDA CONNECT SYSTEM FREQUENTLY ASKED QUESTIONS (FAQ)
09-020-18-3458a2018-08-20. Service bulletin. EQUIPMENT. Some vehicles may exhibit a Connectivity Master Unit (CMU), a BLUETOOTH® hands-free unit 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.
09-010-18-3440a2018-08-20. Service bulletin. ELECTRICAL SYSTEM. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 59.00.546 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 MAZDACONNECT 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.
SA-031-182018-08-20. Service bulletin. EQUIPMENT. When troubleshooting a radar unit, DO NOT swap it with another vehicle. Radar units are configured to the original vehicle, and if installed in another vehicle, a configuration error will occur. Refer to MGSS (RADAR UNIT INSPECTION) for proper diagnosing.
SA-029-182018-08-20. Service bulletin. ENGINE AND ENGINE COOLING. IMPORTANT: If you encounter an IDS inoperative problem with VCM-II license expiration message, follow the instructions below: 1. CLICK HERE to download the resetting tool to your PC desktop. 2. Reboot your PC, DO NOT start any application after restarting. 3. Run the resetting tool by double clicking the "Reset.bat" file (on your desktop from step 1). 4. Press any key after reading the notifications about the resetting tool.
SA-028-182018-07-02. Service bulletin. WHEELS; WHEELS:LUGS/NUTS/BOLTS/STUDS. Some vehicles with accessory installed wheel locks may have had the wrong kit installed using a 21 mm wheel lock key. As of May 01, 2018, Japan produced vehicles use 17 mm hex lug nuts instead of 21 mm on the same size thread. Follow the instructions below to replace the wheel lock kit with a 17 mm wheel lock key. NOTE: The Mazda3 produced in Mexico is not affected
SA-027-182018-07-02. Service bulletin. AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION; SEAT BELTS:FRONT:WARNING LIGHT/DEVICES. Some customers may complain that the passenger seat belt warning light is ON and the PASS AIRBAG OFF indicator light is OFF with no front passenger in the seat. This may be caused by an electrical device (smart phone, tablet, laptop. etc.) placed on the front passenger's seat.
SA-026-182018-07-02. Service bulletin. ENGINE. If a vehicle is driven on extremely short trips most of the time (where the engine never reaches normal operating temperature), the engine oil may become diluted with fuel and the engine oil level will increase. Engine oil dilution with fuel occurring under this specific driving condition is normal with direct injection engines. If the vehicle is driven on a longer trip after a lot of short trips (where the engine reaches normal operating temperature), the Check Engine Light may turn ON with DTC P0172:00 (Fuel system too rich).
SA-016-182018-04-23. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. If the MAZDA CONNECT Connectivity Master Unit (CMU) is replaced due to failure, the replacement CMU may have a navigation system software error. To resolve this concern, after the installation of the new CMU, check the software version.

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