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
| 01-003-23 | 2023-02-02. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may have a "LOW ENGINE OIL LEVEL" warning message and an engine oil level warning light on in the instrument cluster with DTC P250F:00 stored in memory, and the oil level has actually decreased to near low. - DTC P250F:00 - Engine oil level signal: engine oil level low This is caused by an oil consumption increase due to damage of the valve seals on the exhaust side. To eliminate this concern, the design of these valve seals has been modified. |
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| 01-001-23 | 2023-02-02. Service bulletin. ENGINE AND ENGINE COOLING. Some customers may complain about a poor acceleration and rough idling or the CHECK ENGINE light ON with DTC P030X:00 (only turbo engines are applicable; non-turbo engines are NOT applicable). - In most cases, P030X is stored, but sometimes not. - Sometimes the CHECK ENGINE light does not recognize this engine concern. This is caused by the variable valve in the exhaust manifold seizing and causing the exhaust port to become hot and the exhaust valve seat to wear unevenly, resulting in compression leakage. To eliminate this concern, the design of the exhaust manifold has been modified. |
| SA-006/23 | 2023-02-02. Service bulletin. ELECTRICAL SYSTEM. Some customers may complain about the infotainment system and/or the MyMazda App showing incorrect clock and/or tire pressures and/or tire pressure missing. This may be caused by: - Incorrect calendar entry (month/day/year) after a battery disconnect - Infotainment system software update. - BCM TPMS unlearn during vehicle storage or transport. - Wheel/Tire change |
| SA-005/22 | 2023-02-02. Service bulletin. ELECTRICAL SYSTEM. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure. |
| SA-004/23 | 2023-02-02. Service bulletin. LATCHES/LOCKS/LINKAGES. Some customers may report hearing an unusual noise coming from the power liftgate (PLG) when it is unlatching to open or latching closed. This is caused by an internal fault in the liftgate latch and/or loose bolts holding the latch to the liftgate. |
| SA-003/23 | 2023-02-02. Service bulletin. SERVICE BRAKES. Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to the following information to understand why symptoms may occur, and to better assist the customer in resolving their specific brake concern. |
| SA-002/23 | 2023-02-02. Service bulletin. EXTERIOR LIGHTING. Some customers may complain about hearing noise from their headlamps. While some noise is normal from the electric motor, if it is louder in one headlamp than the other or both are significantly louder than a known good vehicle |
| RF-23-02 | 2023-02-02. Service bulletin. ELECTRICAL SYSTEM. Due to the supply chain shortages for BDGF-66-5G0G, hardware has been confirmed compatible between BDGF-66-5G0B up to the G suffix. This can be used for repair with vehicles originally equipped with C to G level suffix parts. |
| RF-23-01 | 2023-02-02. Service bulletin. ENGINE AND ENGINE COOLING. When servicing SKYACTIV engine vehicles requiring to replace the Oil Galley Plug and Crush Washer, order the required part numbers below. These parts are not listed in GEPC and were previously listed as "non-serviceable" in the cylinder block diagram. |
| 09-048-22 | 2023-01-05. Service bulletin. ELECTRICAL SYSTEM. Some vehicles may exhibit the following symptoms with DTC P05A0:00 (Active air shutter and the opening angle abnormality (sticking)) stored in memory. Symptom 1 [Mazda3 and CX-30]: The active air shutter is working, but DTC P05A0:00 is stored in memory. Cause 1: This is caused by improper control software of the PCM detecting the DTC immediately without performing the failsafe operation. When the active air shutter detects unusual torque, it is designed to repeat the open/close cycles up to three times as a failsafe to try to remove the object(s) which temporarily disturbed the movement. Symptom 2 [Mazda3, CX-30 and MX-30]: The active air shutter is frozen by snow and/or ice under freezing temperatures with DTC P05A0:00 stored in memory. Cause 2 [Mazda3 and CX-30]: When a temporary blocking of the active air shutter is expected to be caused by snow and/or ice and the intake air temperature is above the freezing point, DTC P05A0:00 may be unintentionally detected. [MX-30]: When a temporary blocking of the active air shutter is expected to be caused by snow and/or ice and the heater is turned on, DTC P05A0:00 may be unintentionally detected |
| 09-001-22b | 2023-01-05. Service bulletin. STRUCTURE:BODY:DOOR; STRUCTURE. Some vehicles may experience white-streak stains appearing on the front door that look like they seeped out from under the outer mirror base. This is caused by water intruding from gaps of the outer mirror body and/or the hinge of the outer mirror, and corrosion occurring on the aluminum die-cast inner base in the outer mirror. Water, including white-salty corrosion, may drip out from gaps under the outer mirror base resulting in white stains on the front door. To eliminate this concern, the front outer mirror inner base has been modified. |
| 07-004-22b | 2023-01-05. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Some customers may complain the A/C blows warm. This may be caused by one of two things. Cause 1: After accelerating in hot weather, the A/C blows warm air for a longer time than other models. This is caused by improper control software of the PCM not allowing the A/C compressor to resume properly after acceleration. During a hard acceleration above a certain throttle level opening, the PCM stops the A/C compressor operation for better acceleration. It then resumes the compressor operation after the acceleration. To eliminate this concern, the control software of the PCM has been modified. Cause 2: Insufficient cooling performance at ambient temperature of around 68 °F (20 °C) in daytime. This is caused when both the ambient temperature and the cabin temperature are at around 20 °C (68 °F), auto A/C set at around 20 °C (68 °F) may not cool down the cabin temperature properly. To eliminate this concern, control software of the dash-electrical supply unit (Dash-ESU) has been modified. |
| 04-006-22 | 2023-01-05. Service bulletin. SERVICE BRAKES, HYDRAULIC. Some customers may complain about hearing a grinding noise and/or vibration occur when applying the brake. This is due to rust on the rear brake disc plate. |
| 01-017-22 | 2023-01-05. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may experience an engine stall when hard accelerating from a stop (often difficult to reproduce on a test drive), no codes are stored and the vehicle easily restarts with no other drivability concerns. This is only caused in certain situations by the torque reduction calibration in the PCM software. To correct this issue, the control software of the PCM has been modified to optimize the torque reduction feature. |
| SA-078-22 | 2023-01-05. Service bulletin. SERVICE BRAKES, HYDRAULIC. Some vehicles exhibit brake related concerns such as brake noise, brake judder or brake dragging. If you encounter a customer complaint for any one of these symptoms, refer to the following information to understand why symptoms may occur, and to better assist the customer in resolving their specific brake concern. |
| SA-019-22c | 2023-01-05. Service bulletin. ELECTRICAL SYSTEM. MAZDA CONNECTED SERVICES Frequently Asked Questions (FAQ) |
| SA-017-22d | 2023-01-05. Service bulletin. ELECTRICAL SYSTEM. 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. * Remote function(s) inoperative. - Engine Start / Stop - Door Lock / Unlock - Lights ON / OFF * MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Confirm the customer's phone and vehicle have good to strong reception during the concern as shown in the table below. * If the reception is weak, move the vehicle to a location where the reception is good to strong as shown in the table, then try to get the Authorization Code and/or operate the remote functions before proceeding to the Repair Procedure if there is still an issue. * If the reception is good to strong, proceed to the Repair Procedure |
| SA-016-22a | 2023-01-05. 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 |
| SA-004-22g | 2023-01-05. Service bulletin. ELECTRICAL SYSTEM. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure. |
| MT-004-22 | 2023-01-05. Service bulletin. ENGINE AND ENGINE COOLING. 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-075-22 | 2022-12-02. Service bulletin. ELECTRICAL SYSTEM. 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 MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices. Examples: 1. Devices connected to the DLC-2 (battery discharge/DTC stored) 2. Cell phone charger/accessory in 12V socket (engine no start or unable to turn off) 3. GPS tracking device (engine no start/battery discharge) 4. Dash cam (DTC stored) 5. Non-certified USB cable (Apple Carplay™/ Android Auto™ will not connect) 6. Over-sized wheels/tires (incorrect GPS location) |
| SA-074-22 | 2022-12-02. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ELECTRICAL SYSTEM. Some customers may complain the HVAC system not maintaining the correct temperature or the ambient (outside) temperature reading incorrectly. This is caused by a failure in the ambient temperature sensor. To correct this issue, the ambient temperature sensor has been modified. |
| SA-070-22 | 2022-12-02. Service bulletin. ELECTRICAL SYSTEM. Some customers may complain about intermittent audio no sound from the MAZDA CONNECT infotainment system and/or static noise from the speakers. The concern may be reproduced by tapping on the dash pad near the MAZDA CONNECT center display and the following DTC's may be stored. * U0186:08 Communication error with audio amplifier * U2145:08 Communication error with remote tuner (RT) * U2145:02 Communication error with remote tuner (RT) This may be caused by PIN 6F backing out at the CMU connector 0920-101F. |
| SA-064-22a | 2022-12-02. Service bulletin. ELECTRICAL SYSTEM. Some customers may comlpain about an intermittent Beep sound (popping sound) every 1 ~ 2 minutes while driving. This may be cause by a software error in the navigation SD card. |
| 16-006-22a | 2022-12-02. Service bulletin. ELECTRICAL SYSTEM. Some vehicles may experience the symptoms mentioned below, which can be fixed with the latest software update (Version 7000C0A-NA04_12004 or later). Ver. 7000C0A-NA04_12004 and later fixes these software errors (bugs): * Album artwork may not appear when playing music using an USB connected iPhone. * When the gear position is shifted into P from R, the screen may not return to the previous condition before shifting into R position. * The screen freezes and goes to a white screen, then the system reboots. * The steering wheel switches and commander switches cannot control the audio system. * DTC U3000:49 is stored which may be accompanied with following symptoms: - No sound emitting from the speakers. - Audio source selection is unavailable. * The vehicle icon rotates when using the navigation with head-up mode. * Beep sounds every after couple of minutes. * Language setting may not be accepted correctly. * The audio track may not pause when pressing the mute button. * The system reboots. * The screen may turn black when trying to play a video file in the USB connected device. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.