WenmarOpen by Wenmar Pro

Service bulletins for the 2021 Mazda CX-30

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.

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

By type

By component

By trouble code

By topic

Bulletins, newest first
09-025-21-38242021-08-24. Service bulletin. EQUIPMENT. 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.
SA-044-212021-08-03. Service bulletin. SERVICE BRAKES, HYDRAULIC. When switching to the maintenance mode, U3000:53 and the related DTCs are stored, but the DTCs will not be cleared automatically after finishing the maintenance mode. It is necessary to clear the DTCs completely after performing the brake system maintenance mode. DTC codes: U3000:53, C0021:52, U0415:68
SA-043-212021-08-03. Service bulletin. EQUIPMENT. If both key transmitters are lost, MDARS key programming functions may be missing, not allowing new key transmitters to be added. Use the procedure below to program new key transmitters when both keys are lost.
SA-045-212021-08-03. Service bulletin. ELECTRICAL SYSTEM. Some customers may experience the following symptoms: Connected Vehicle Remote Functions inoperative after SSPC6 repair. Connected Vehicle Remote Functions inoperative on vehicles built July 1, 2021 and later. Engine no start due to low battery voltage.
09-020-21-38042021-08-02. Service bulletin. STRUCTURE. Some vehicles may exhibit water leaking into the passenger compartment from the rear door through the bottom of the service hole behind the rear door trim during rain or when washing the vehicle. This is caused by one of the following: Since the material of the seal rubber is not resistant to surfactants, the rubber deteriorates when the vehicle is washed and allows water to penetrate into the seal rubber of the service hole cover. The lower tabs of the service hole cover may not have been completely engaged at the factory. To eliminate this concern, the service-hole cover has been modified. NOTE: It is a tentative change.
02-002-21-3769a2021-08-02. Service bulletin. WHEELS. Some automotive cleaning products contain strong acid or alkali. When these types of cleaners are used to clean the wheels on Mazda vehicles, the chemicals contents penetrate the clear coating of the wheel surface and damage the paint under the clear coating. The damaged area has the appearance of dark stains or discoloration.
SA-004-21b2021-07-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. 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. CAUTION: If TCU activation is not performed, connected vehicle functions will not operate. This will have a negative impact on the customer because they will need to return to the dealer for repairs.
SA-029-21a2021-07-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. APPLE CARPLAY / ANDRID AURO FREQUENTLY ASKED QUESTIONS (FAQ) The following vehicles are not equipped with Apple CarPlay / Android Auto, but it can be activated using MDARS. See Activation instructions on MGSS -> Infotainment -> MAZDA CONNECT Updates -> Apple Carplay / Android Auto MDARS Activation Instructions
SA-027-21a2021-07-02. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. MAZDA CONNECT Symptom Troubleshooting (7th Generation Vehicles). Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure
SA-013-21f2021-07-02. Service bulletin. ENGINE AND ENGINE COOLING; EXTERIOR LIGHTING; EQUIPMENT ADAPTIVE/MOBILITY. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App Connected Vehicle enrollment (and Software Update Error message on 2020 Mazda3 only). Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF, MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
SA-012-21f2021-07-02. Service bulletin. ENGINE AND ENGINE COOLING; SERVICE BRAKES. MAZDA CONNECTED SERVICES - FREQUENTLY ASKED QUESTIONS (FAQ): Index: General Questions, Setup and Getting Started, Registration / Enrollment, WI-FI General Information, WI-FI How-To, WI-FI Trial Period, Interacting With The App, Service Issues, Troubleshooting, Reception Level Inspection, Dealer Processes, Conditions for Remote Engine Start Will Not Function, Conditions for Remote Engine Start Function Will turn engine OFF, Educational Videos, Resources
SA-030-21a2021-07-02. Service bulletin. EQUIPMENT. There are currently 2 methods for cutting a new auxiliary key blank. A. Auxiliary Key Trace Cut Method B. Auxiliary Key Code Cut Method A. Auxiliary Key Trace Cut Method If only one auxiliary key is lost/missing, some key cutting machines can trace cut a new key blank. 1. Trace cut the new auxiliary key blank(s). B. Auxiliary Key Code Cut Method If both auxiliary keys are lost/missing, use this method for cutting new auxiliary key blank(s). 1. Confirm you have access to a Mazda approved key cutting machine. See “Mazda Approved Key Cutting Machine” table.
SA-039-212021-07-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. Some customer may experience all of the following when turning the ignition ON under hot weather conditions such as parking under the hot sun for some period of time: i-ACTIVSENSE warning light ON (1), Smart Brake Support (SBS) indicator light ON (2), "Excessive Camera Temp. Drive Safely" or "Safety and Driver Support Systems Temporarily Disabled" warning messages, DTC B14F9:00 stored in memory, DTC B14F9:00 cannot be found on MGSS, therefore repair cannot be performed.
SA-040-212021-07-01. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Some vehicles may experience exterior trim heat damage when parked near a glass building or Low-E windows. This may be caused by the sun's reflection.
SA-041-212021-07-01. Service bulletin. EQUIPMENT. Accessory instructions can be found on OneMazda under Dealer Resources - Parts & Accessories. The links provided below can be used for quick access: For 2016 models and newer: NOTE: Instructions are found under the "Attachments" section once a part is selected. Accessories E-catalog For models prior to 2016: Accessory Parts and Installation Instructions
MT-003-212021-06-29. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Some vehicles may experience exterior trim heat damage when parked near a glass building. This may be caused by the suns reflection. If a building creates enough of a curve with a series of flat windows, which act like mirrors, the reflections all converge at one point, focusing and concentrating the light onto the street below.
09-019-21-38132021-06-29. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY. Some vehicles may exhibit a deformed fuel-filler lid panel (1) attached to the fuel-filler lid box, resulting in a poor appearance. This concern is caused by the lid box not having enough water drainage capability which leads to the accumulation of water inside it. The water then freezes in cold weather and expands or the inner side of the lid panel absorbs the water and swells from long exposure, deforming the lid panel. To eliminate this concern, the shape of the fuel-filler lid box has been modified to have better drainage capability and a modified fuel-filler lid panel service part has been established for less water absorbance.
09-012-21-3801a2021-06-29. Service bulletin. ELECTRICAL SYSTEM; LATCHES/LOCKS/LINKAGES; ENGINE AND ENGINE COOLING. Some customers may experience all of following symptoms: The door lock/unlock operation will not work using the remote transmitter button. The door lock/unlock operation will not work using the door lock/release touch sensor. The engine will not start using the ignition switch. This is caused when excess load is applied to the remote transmitter and the electrical terminals in it may be deformed, causing poor contact with the battery. To eliminate this concern, the structure in the remote transmitter has been modified to reduce the deformation of the electrical terminals.
04-003-21-38102021-06-29. Service bulletin. SERVICE BRAKES; EQUIPMENT ADAPTIVE/MOBILITY. Some customers may complain about the following braking concerns when coming to a stop while following a vehicle ahead using Mazda Radar Cruise Control with Stop and Go function (MRCC). Harder braking at slow speeds just before a complete stop. Before coming to a complete stop, the vehicle creeps towards the vehicle ahead and Depress Brake Pedal warning message may appear in the instrument cluster. This is caused by improper control software of the DSC HU/CM. To eliminate this concern, the control software of the DSC HU/CM has been modified.
SA-034-212021-06-03. Service bulletin. EQUIPMENT. When performing vehicle services such as control unit software update, control unit registration/activation, CMU log data retrieval, etc., always use the DCA8000 OR GR8 battery charger SST to maintain battery voltage.
SA-036-212021-06-03. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; LANE DEPARTURE; EXTERIOR LIGHTING; FORWARD COLLISION AVOIDANCE. 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 build on or before March 2, 2019], No DTC - 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.
SA-012-21e2021-06-03. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY. MAZDA CONNECTED SERVICES - FREQUENTLY ASKED QUESTIONS (FAQ): Index: General Questions, Setup and Getting Started, Registration / Enrollment, WI-FI General Information, WI-FI How-To, WI-FI Trial Period, Interacting With The App, Service Issues, Troubleshooting, Reception Level Inspection, Dealer Processes, Conditions for Remote Engine Start Will Not Function, Conditions for Remote Engine Start Function Will turn engine OFF, Educational Videos, Resources
SA-013-21e2021-06-03. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EXTERIOR LIGHTING. Some customers may complain about any of the following: Infotainment Center Display does not provide the Authorization Code during the MyMazda App Connected Vehicle enrollment (and Software Update Error message on 2020 Mazda3 only). Remote function(s) inoperative. Engine Start / Stop, Door Lock / Unlock, Lights ON / OFF, MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
SA-032-212021-06-03. Service bulletin. POWER TRAIN. 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.
SA-033-212021-06-02. Service bulletin. POWER TRAIN. The rear differential case could develop a crack in the case, as shown below. NOTE: This could affect new vehicles just delivered to the dealer as well as customer vehicles.

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