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Service bulletins for the 2018 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.

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

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Bulletins, newest first
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.
06-002-18-35042018-10-09. Service bulletin. STEERING; WHEELS. Some vehicles may exhibit a light resistance and/or an unusual noise when turning the steering wheel to the left. This concern may be caused by insufficient lubrication of the gear due to uneven and deteriorated grease. To eliminate this concern, the production process for steering shaft has been modified.
03-002-18-3505a2018-10-09. Service bulletin. POWER TRAIN:DRIVELINE:DRIVESHAFT; POWER TRAIN:DRIVELINE:UNIVERSAL JOINT. Some vehicles may exhibit a squeak noise from the right front driveshaft at the transaxle when driving. This concern is likely to occur when driving at speeds between 37-50 mph (60-80 km/h) with the ATF at normal operating temperature. The noise is caused by stick/slip between the oil seal at the transaxle and the dust cover of the drive shaft. To correct this issue, the thickness of the dust cover has been increased.
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.
01-016-18-35222018-10-09. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. On some vehicles, a sulfur smell or 'rotten egg' odor may be noticed coming from the exhaust system. The odor is usually noticed after a cold start, fast idle, extended periods of idling and full throttle acceleration. Sulfur smell is not an indication of an engine concern and will not cause reduced driveability or durability of the engine or any of its emission components. The sulfur smell or 'rotten egg' odor is caused by high amounts of sulfur in the gasoline being used in the vehicle. Sulfur is normally eliminated during the refining process, but the EPA regulation of sulfur in gasoline differs from state to state. Vehicles using fuel containing high amounts of sulfur will most likely emit sulfur smell from the exhaust system. When high sulfur fuel is burned, there is a chemical reaction in the catalytic converter causing the sulfur to oxidize. As the vehicle is driven, the oxidizing reaction odor in the converter will decrease with mileage and age.
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-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.
09-033-18-35062018-09-10. Service bulletin. ELECTRICAL SYSTEM. Some customers may experience the active driving display (auto flip-up type) does not flip up and no DTC is stored. Due to improper assembly, a deformed bracket may cause a loose mesh between internal gears. To correct this issue, the active driving display has been changed.
03-002-18-35052018-09-10. Service bulletin. POWER TRAIN:DRIVELINE:DRIVESHAFT. Some vehicles may exhibit a squeak noise from the right front driveshaft at the transaxle when driving. This concern is likely to occur when driving at speeds between 37-50 mph (60-80 km/h) with the ATF at normal operating temperature. The noise is caused by stick/slip between the oil seal at the transaxle and the dust cover of the driveshaft. To correct this issue, the thickness of the dust cover has been increased.
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.
DRW132018-09-10. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). Dealer Rework (DRW) 13 - Mazda Connect Navigation Concern. As you may know, DRW13 was launched in March of 2018. This notice is to advise all dealers that DRW13 will be ending August 16th 2018 and all claims must be submitted by this date.
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-034-182018-08-20. Service bulletin. EQUIPMENT. MAZDA CONNECT SYSTEM FREQUENTLY ASKED QUESTIONS (FAQ)
15-002-18-35022018-08-20. Service bulletin. FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERA; ELECTRICAL SYSTEM. Some customers may complain about one or more warning lights ON when they start the vehicle during hot weather. The following DTC is stored in memory: U3000:98 - Forward sensing camera (FSC) stops functioning due to temporary high temperature. The combination of warning lights mentioned by the customer may include: SCBS/SBS LAS/LDWS HBC Master Warning Light 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 the FSC not being durable enough in high temperatures. [Earlier production Mazda3, Mazda6, CX-3 and CX-5 until summer 2017] The warning lights may stay on and these functions are deactivated until the ignition switch is turned off. Both U3000:98 (FSC) and U3000:04 (FSC) are stored. U3000:04 - Forward sensing camera (FSC) internal malfunction. If only U3000:04 (FSC) is stored, this TSB does not apply. 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.
05-003-18-3460a2018-08-20. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION. 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-R or 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.
02-013-18-34912018-08-20. Service bulletin. SUSPENSION. Some vehicles may exhibit a crack on the front shock absorber dust boot (1). This may be caused by the dust boot having insufficient resistance to the cold. The shape and material of the dust boot has been changed to improve its resistance to cold.
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.

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