2021 Mazda CX-9 Technical Service Bulletins

428 technical service bulletins (TSBs) are on record for the 2021 Mazda CX-9. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11022763Aug 7, 2025Engine. SPECIAL SERVICE PROGRAM - SSPD5 - WARRANTY EXTENSION - MULTI-MODEL - VALVE STEM SEALS CLASS ACTION In conjunction with a Class Action Settlement, Mazda Motor Corporation has decided to conduct an extension of the Engine powertrain warranty related to excessive oil consumption.
• 11022758Aug 7, 2025Engine. SPECIAL SERVICE PROGRAM - SSPD5 - WARRANTY EXTENSION - MULTI-MODEL - VALVE STEM SEALS CLASS ACTION In conjunction with a Class Action Settlement, Mazda Motor Corporation has decided to conduct an extension of the Engine powertrain warranty related to excessive oil consumption.
• 11021499Jul 14, 2025Other or unknown, Exterior lighting, Engine. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
• 11021498Jul 14, 2025Other or unknown. Mazda Connected Services - Frequently Asked Questions (FAQ)
• 11020039Jun 19, 2025Other or unknown. Some customers may complain about a noisy HVAC blower motor or odor after a cabin air filter replacement. Foreign debris on the blower motor after servicing the cabin air filter may be the cause. During the removal of the cabin air filter, foreign debris (leaves, dust, dirt....ect.) may fall on the blower motor causing a fluttering type noise or odor.
• 11020038Jun 18, 2025Other or unknown. Some customers may report an odor or water in the HVAC system and upon inspection, the cabin air filter may be found to be wet.
• 11020035Jun 3, 2025Electrical system. The Mazda DCA-8000 is required for all warranty battery testing. If the Mazda DCA-8000 is not used, incorrect battery testing may result in unnecessary battery replacement. Use the following test procedures in this Service Bulletin to test Mazda vehicle batteries and to generate a Warranty Code. NOTE: A Warranty Code is required for warranty claim submission Battery Identification (Mazda batteries have 2 rating…
• 11019097May 22, 2025Other or unknown. Some vehicles may exhibit following symptoms: 1. The rearview mirror (1) rattles up and down (2) while adjusting the mirror. 2. The rearview mirror (1) makes a rattle noise depending on the road surface conditions while driving. This concern is caused during rearview mirror installation. The adhesive is squeezed out between the windshield and the mirror base. The rearview mirror is assembled on top of the…
• 11019180May 16, 2025Other or unknown. Mazda Navigation Live Traffic information is available on the following 2 systems. SiriusXM® 3 Yr Traffic and Travel Link* Mazda Online Navigation* The table below provides Setting information for both systems. See APPLICABLE MODEL(S)/VINS above to determine how vehicles are equipped. NOTE: When selecting Navigation, data upload may take a few seconds. This is a normal function.
• 11019179May 16, 2025Other or unknown, Electrical system, Exterior lighting, Engine. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
• 11019178May 16, 2025Other or unknown. Frequently Asked Questions (FAQ) for Mazda Connected Services.
• 11019177May 16, 2025Other or unknown. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
• 11017699Apr 25, 2025Other or unknown. A musty/mildew type odor may come from the vents when the air conditioning (A/C) system is operating. It is most noticeable when the A/C is first turned ON. This odor is the result of mold growth in the A/C evaporator/cooling unit which is caused by condensation, dust, and pollen within the cooling unit. This condition is usually worse during high humidity conditions. “Mazda Air Cooling Coil Coating” is available…
• 11017697Apr 16, 2025Other or unknown. 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.
• 11016237Mar 21, 2025Engine, Other or unknown. Frequently Asked Questions (FAQ)
• 11016235Mar 20, 2025Other or unknown. The new AWD rear differential DOES NOT come with a breather cap on the rear of the differential, therefore a new one will need to be ordered and installed when replacing the differential. NOTE: The breather threads have a sealant and locking compound that prevents it from being reused. Refer to GEPC for the correct part number of the Differential Breather. The instructions on MGSS will be updated soon to include…
• 11014991Feb 28, 2025Electrical system, Other or unknown. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
• 11015005Feb 19, 2025Other or unknown. Some customers may experience a Connected Vehicle failure. The MyMazda App may display an Error Code. This document provides Error Code description and recovery information to assist with repairs.
• 11015003Feb 8, 2025Electrical system. Key Transmitter Power Saving Function: When the key transmitter Power Saving Function is turned ON, transmitter battery power consumption is restricted, thereby extending the transmitter battery life and the following will occur: The engine will not start unless the key transmitter is held over the Start Stop button. • Outside door handle lock/unlock touch sensor is inoperative. • Key transmitter indicator lights…
• 11015004Feb 4, 2025Electrical system, Other or unknown. The Mazda DCA-8000 is required for all warranty battery testing. If the Mazda DCA-8000 is not used, incorrect battery testing may result in unnecessary battery replacement. Use the following test procedures in this Service Bulletin to test Mazda vehicle batteries and to generate a Warranty Code.
• 11013654Jan 24, 2025Steering. Some vehicles may exhibit wear/peel-off of the leather steering wheel surface causing a poor appearance. This concern may be caused by an insufficient wear resistance of the steering wheel surface.
• 11013788Jan 22, 2025Electrical system, Engine, Other or unknown. Key Transmitter Power Saving Function: When the key transmitter Power Saving Function is turned ON, transmitter battery power consumption is restricted, thereby extending the transmitter battery life. NOTE: Some customers may complain about an engine no start. This may be caused by the customer inadvertently putting the key transmitter in Power Saving Function.
• 11013787Jan 21, 2025Other or unknown. When performing the MGSS Workshop Manual 360° View Monitor System Aiming Procedure, M-MDS may show error message "Procedure unsuccessful". This may be caused by light glare on the SST.
• 11012342Dec 11, 2024Electrical system. Some customers may experience the following symptoms of the wireless charger (Qi), even when the mobile device (smartphone etc.) is placed in the proper position on the wireless charger (Qi). It does not start charging. It stops charging with the indicator flashing in red after starting. It stops charging without any visible sign after starting.
• 11012345Dec 6, 2024Other or unknown, Electrical system, Engine. Frequently Asked Questions (FAQ)
• 11011138Nov 15, 2024Other or unknown. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
• 11011141Nov 8, 2024Other or unknown. Some customers may report concerns with interior upholstery surface stains particularly on high contact areas (e.g.: seats, steering wheel, door panels, shifter...etc.). This may be caused by skin oils or chemicals such as hand lotions.
• 11011140Nov 5, 2024Electrical 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.
• 11009654Oct 24, 2024Transmission and drivetrain. The SKYACTIV-DRIVE FW6A-EL AT uses “Automatic Transmission Fluid (ATF) Type: FZ”. Only use “ATF-FZ” to fill or top off the fluid level. ATF-FZ is specially designed for use in the SKYACTIV-DRIVE series AT. It is a low viscosity formula with less friction for better fuel economy. NOTE: ATF-FZ is colored blue for easy identification.
• 11009663Oct 22, 2024Engine. SPECIAL SERVICE PROGRAM - SSPD5 - WARRANTY EXTENSION - MULTI-MODEL - VALVE STEM SEALS CLASS ACTION In conjunction with a Class Action Settlement, Mazda Motor Corporation has decided to conduct an extension of the Engine powertrain warranty related to excessive oil consumption.
• 11009634Oct 12, 2024Body and structure. Some customers may complain that the power liftgate (PLG) may open unintentionally while the vehicle is parked or stopped. Due to the shape of the 7th generation remote transmitter, the power liftgate button may be long pressed unintentionally in a pocket or a bag. To eliminate this concern, the keyless control specification has been modified. The button press time has been increased from 0.5 seconds to 1 second.
• 11009644Oct 5, 2024Brakes. 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.
• 11008568Sep 25, 2024Electrical system. Some customers may experience a “Telematics Malfunction” message in the instrument cluster with DTC U3000:00-TCU (Emergency call unit/telematics communication unit internal malfunction) or U3000:04-TCU (Telematics communication unit internal malfunction) stored in memory. This is caused by improper control software of the telematics communication unit (TCU). To eliminate this concern, the control software of the…
• 11008580Sep 24, 2024Electrical system. Mazda Connect Services - Frequently Asked Questions (FAQ)
• 11008574Sep 24, 2024Other or unknown, Electrical system. Some customers may experience a Connected Vehicle failure. The MyMazda App may display an Error Code. This document provides Error Code description and recovery information to assist with repairs.
• 11008578Sep 13, 2024Electrical 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.
• 11008577Sep 12, 2024Other or unknown. Some customers may complain about scratches on the instrument cluster lens.
• 11008576Sep 12, 2024Electrical system. Qi Wireless Charger symptom troubleshooting.
• 11008579Sep 11, 2024Electrical system. Mazda Connect Services - Frequently Asked Questions (FAQ)
• 11008575Sep 11, 2024Electrical system. Some customers may complain about the Active Driving Display not displaying turn by turn (TBT) travel direction or navigation information.
• 11008573Sep 11, 2024Electrical system, Engine, Exterior lighting. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control
• 11008571Sep 11, 2024Other or unknown, Electrical system. Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
• 11007029Aug 26, 2024Electrical system. For improvement of electrical diagnosis, the SKYACTIV® Wiring Terminal Test Kits has been delivered all the dealers. The terminal test kit enables you: To check pin fit drag of all PCM terminals used in SKYACTIV® vehicles and compare suspect terminal drag with a known good terminal. To measure the voltage/resistance avoiding any terminal damage.
• 11007009Aug 21, 2024Brakes. 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.
• 11007022Aug 15, 2024Body and structure. Some vehicles may experience exterior trim heat damage such (melted, separating, etc.) when parked near a glass building or Low-E windows. This may be caused by the sun's reflection.
• 11007019Aug 15, 2024Electrical system, Other or unknown, Engine. 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.
• 11007018Aug 13, 2024Body and structure. Interior parts made of resin have antistatic coating to prevent dust from sticking on the surfaces, and depending on the conditions of use, the antistatic components may crystallize slightly, giving an appearance of white stains on the surface. To remove the stains, wipe the stained surface with a towel soaked with water mixed with a small portion of a neutral detergent. If the white stains reappear again, simply…
• 11007013Aug 12, 2024Other or unknown. Auxiliary key blank cutting procedure. There are currently 2 methods for cutting a new auxiliary key blank. A. Auxiliary Key Trace Cut Method B. Auxiliary Key Code Cut Method
• 11006987Aug 8, 2024Electrical system, Other or unknown. 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…
• 11007010Aug 7, 2024Engine, Transmission and drivetrain. Some customer's might state that they notice fluid or oil leaking/dripping on the ground when the vehicle is parked. For this concern, inspect the vehicle for any trace of a fluid or oil leak and use the following examples as a guide to determine if it is severe enough to require a repair, or just to clean the area and monitor it at the next service.

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