Service bulletins for the 2026 Mazda CX-90
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.
143 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Engine are shown. Show all
| SA-061-26 | 2026-10-01. Service bulletin. ENGINE; POWER TRAIN. DESCRIPTION Use this guide before ordering or replacing an AT component on applicable H3T vehicles. QUICK CHECKLIST BEFORE ORDERING Confirm the vehicle is a CX-90 (KK) or CX-70 (KJ) with H3T and is within the applicable market coverage. • In GEPC, identify the AT component part number for the vehicle. • Use the GEPC lookup tables below to determine whether the vehicle requires Table A or Table B parts. • Order the complete set of parts listed in the applicable table. DO NOT order the AT component by itself. • Check whether water hose removal is required for that GEPC part number. • Follow the applicable WSM repair procedure for AT component removal/installation, water hose removal, and oil hose/oil pipe installation in MGSS. • IMPORTANT: If only the AT component is ordered, required replacement parts will be missing, and the repair cannot be completed. |
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| SA-059-26 | 2026-10-01. Service bulletin. ENGINE. This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-029/24 05/09/24 DESCRIPTION The CX-90 and CX-70 PHEV are equipped with two electric water pumps that look similar but have different part numbers. CAUTION: If the wrong water pump is ordered or they are reversed, DTC U019F could be set. |
| PF-26-04 | 2026-10-01. Other. ENGINE; POWER TRAIN. SUBJECT: ORDERING REQUIREMENT FOR AT COMPONENTS FOR H3T (INLINE 6) Use this guide before ordering or replacing an AT component on applicable H3T vehicles. QUICK CHECKLIST BEFORE ORDERING • Confirm the vehicle is a CX-90 (KK) or CX-70 (KJ) with H3T and is within the applicable market coverage. • In GEPC, identify the AT component part number for the vehicle. • Use the GEPC lookup tables below to determine whether the vehicle requires Table A or Table B parts. • Order the complete set of parts listed in the applicable table. DO NOT order the AT component by itself. • Check whether water hose removal is required for that GEPC part number. • Follow the applicable WSM repair procedure for AT component removal/installation, water hose removal, and oil hose/oil pipe installation in MGSS. IMPORTANT: If only the AT component is ordered, required replacement parts will be missing, and the repair cannot be completed. |
| 09-027-26 | 2026-10-01. Service bulletin. ENGINE; ELECTRICAL SYSTEM. DESCRIPTION Some CX-70 and CX-90 PHEV vehicles may fail to start (enter READY mode) in cold weather, but the vehicle can often be started successfully on the next attempt. This may occur when leakage current between connector terminals causes the MAIN Relay to be falsely detected as ON. As a result, the Battery ECU may incorrectly determine the relay status, preventing READY mode activation and resulting in a no-start condition. One or more of the following DTCs may be stored: P0AB9, U0100, U0110, and U0115 and multiple warning lights may also turn on. This is caused by corrosion of the connector terminals on the 3002-411 connector in the luggage compartment from water. To eliminate this concern, urethane has been added around the connector to help prevent water from reaching the connector terminals. REPAIR PROCEDURE 1. Verify the customer concern. 2. Diagnose and repair the vehicle according to the following steps. NOTE: The following procedure uses a heat shrink tube with solder. (1) Connect wire to wire with heat shrink tube. (2) Form a loop at the end of wire to create a passage for the other wire. |
| SA-038-26a | 2026-09-04. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM; ENGINE; EXTERIOR LIGHTING. This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA-038/26 06/15/26 DESCRIPTION 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 functions inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Index MAZDA CONNECT 2 Center Display Status Icon MAZDA CONNECT 3 Center Display Status Icon Remote Engine Start Will Not Function Remote Engine Start Function Will turn engine OFF Customer Subscription Status TCU Communication Line Status |
| SA-042-26 | 2026-07-03. Service bulletin. ENGINE; ELECTRICAL SYSTEM; UNKNOWN OR OTHER. This Service Alert supersedes the previously issued SAs listed below. The changes are noted in Red text. SA-017/25 12/16/25, 09/08/25, 07/14/25, 05/15/25 and 03/21/25 DESCRIPTION Mazda Connect Frequently Asked Questions (FAQ) Index General Questions MAZDA CONNECT Indication Setup and Getting Started Dealer Processes Registration / Enrollment / Take-Over Customer Subscription Status WI-FI General Informatio Opening the TCU Communication Line WI-FI How-To Conditions for Remote Engine Start Will Not Function WI-FI Trial Period Conditions for Remote Engine Start Function Will turn engine OFF Interacting With The App TCU Communication Line Status Service Issues Educational Videos Troubleshooting Resources MyMazda App Error Codes Customer Opt-Out |
| SA-041-26 | 2026-07-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This SA supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-061/25 12/17/25 DESCRIPTION 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. Devices plugged into the 12V outlet 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) 7. DTC C0023:14 8. Decorative trim and/or cover on the START/STOP ENGINE button Example 1: Some electrical devices connected to the DLC-2 connector by insurance or mobile phone companies may cause: Battery discharge. The device may disrupt the CAN system battery saver mode. • IDS/MMDS will not communicate with the vehicle due to poor DLC-2 connection. The aftermarket device may cause DLC-2 female terminals to spread open. |
| 01-002-26a | 2026-07-03. Service bulletin. ENGINE. This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 01-002/26 01/07/26 DESCRIPTION Some vehicles may exihibit a vibration in the accelerator pedal and steering wheel when accelerating during a sharp left-hand turn. An abnormal noise may also be heard from the footwell area. This may be caused by insufficient clearance between the engine mount stopper rubber and the engine mount bracket. Customer may state: Vehicle shudders/vibrates on left turns, most often when accelerating from a stop or entering a driveway. • They feel a pop or grind in the accelerator pedal when the vibration occurs. • They hear a rumbling or grinding noise, mainly from the right side, during the left-turn shudder. • NOTE: The condition does not occur at shallow steering angles or when the vehicle is stationary and the steering effort remains unchanged when the vibration and noise are present. REPAIR PROCEDURE 1. Verify the customer concern. NOTE: DO NOT use power tools in this procedure. Use hand tools only. 2. Disconnect the negative battery terminal using the procedure in [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION]. 3. Remove the engine cover. b. Replace the stopper rubber (2) with a modified part. |
| MSP66 Warr b | 2026-05-05. Service campaign. POWER TRAIN; ENGINE; ELECTRICAL SYSTEM. 2024-2026 CX-90 and 2025-2026 CX-70 Engine Warning Light Illumination with DTC P0DAB CONDITION OF CONCERN On certain subject vehicles, the engine warning light may illuminate, and the vehicle may be limited to engine-only operation due to activation of the fail-safe mode. Motor assist, i-stop and motor regenerative functions may be disabled, although the vehicle is safe to drive. The DTC P0DAB (Cell voltage variation malfunction) may be stored. Causal factor: Improper software in the Powertrain Control Module (PCM) and - MHB in MDARS display - BECM (Battery Energy Control Module). OUTLINE OF REPAIR Reprogram the PCM and MHB with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic And Repair Software (MDARS). Note: The TCM may or may not be reprogrammed, please see below for the claim type depending on whether the TCM was programmed or not programmed. All 2026MY vehicles do not require TCM programming. Older vehicles especially with recent software or campaign updates will already have the TCM at the latest software version and will not be programmed. |
| SA-029-26 | 2026-05-05. Service bulletin. UNKNOWN OR OTHER; ENGINE; POWER TRAIN; SERVICE BRAKES. This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers. SCHEDULED MAINTENANCE Refer to the applicable Workshop Manual or Owner's Manual for vehicle -specific manufacturer scheduled maintenance. Workshop Manual - Refer to section 00-00 SCHEDULED MAINTENANCE. Owner's Manual - Refer to section 8 Maintenance and Care. b. Note: Please refer to the information below outlining the services not included in Mazda's Factory Scheduled Maintenance: IMPORTANT: Recommending fluid flushes when not necessary can lead to customer confusion and dissatisfaction. Fluid flushing for preventive maintenance purposes is strongly discouraged, unless otherwise specified in a published procedure (Owner’s Manual, Workshop Manual, Technical Service Bulletin, etc.). |
| SA-026-26 | 2026-05-05. Service bulletin. ENGINE. This Service Alert supersedes the previously issued M-Tip(s) listed below. The changes are noted in Red text. MT-002/19 09/30/19 and 12/19/19 DESCRIPTION If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake manifold internally before installing a replacement engine assembly. If the intake manifold is not cleaned properly, the replacement engine may fail prematurely. Metallic debris from the old engine (with catastrophic internal mechanical failure) may rest inside the intake manifold. When the new engine assembly is installed, debris in the intake manifold will be ingested into the new engine and cause internal damage. Clean the intake manifold internally to remove any debris from old engine before installing the new replacement engine assembly. If the intake manifold cannot be properly cleaned internally, replace it. |
| SA-014-26 | 2026-04-02. Service bulletin. ENGINE. This Service Alert supersedes the previously issued SA(s) and TSB(s) listed below: The changes are noted in Red. SA-035/24 05/31/24 DESCRIPTION There is a concern that some water pumps are being replaced that are not faulty, due to signs of a very small coolant leak from the bleed hole. This Service Alert is to inform you about the water pump sealing mechanism and the criteria if replacement is necessary or not. A mechanical seal (A) is used for the water pump. This mechanical seal can seal coolant (B) by sliding a mating ring (C) against a seal ring (D). When the sliding surface temperature of the mechanical seal is more than 248 °F (120 °C) while driving, a small amount of steam (E) is leaked and bleeds through the bleeding hole (F). After drying, the steam leaves a green coolant deposit near the water pump bleed hole (F). This is a normal condition and does not require water pump replacement. The water pump should only be replaced if there is an accumulation of crystallized coolant near the bleed hole. When you encounter a water pump with coolant seepage marks, decide to replace it or not based on the following criteria using sample photos. NOTE: During the initial period of use*, the sliding surfaces of the seals may not yet be fully settled, which can temporarily increase the amount of leakage. Continued use will allow the surfaces to settle, reducing the leakage. Replacing parts that are already settled with new ones will increase the leakage again until the new parts become conditioned. Therefore, replacement should be avoided in this initial period of use. *As a guideline, this applies to vehicles with less than 1,860 miles (3000 km) of mileage. |
| 01-005-26 | 2026-03-03. Service bulletin. ENGINE. Some vehicles may exhibit green residue (yellow circle) on the outer surface of the coolant reserve tank, which appears to be coolant blowback. This is caused by coolant seeping out and appearing as leakage from small pores (slight gaps) formed due to the deterioration of the coolant reserve tank (sub) material. To eliminate this concern, the material of the coolant reserve tank (sub) will be modified. |
| MSP66 Warranty a | 2026-02-03. Service campaign. ENGINE. Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email. |
| MSP66 Video | 2026-02-03. Service campaign. ENGINE. Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email. |
| MSP66 Repair b | 2026-02-03. Service campaign. ENGINE. Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email. |
| MSP66 Repair a | 2026-02-03. Service campaign. ENGINE. Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email. |
| 01-002-26 | 2026-02-03. Service bulletin. ENGINE. Some vehicles may exihibit a vibration in the accelerator pedal and steering wheel when accelerating during a sharp left-hand turn. An abnormal noise may also be heard from the footwell area. This may be caused by insufficient clearance between the engine mount stopper rubber and the engine mount bracket. Customer may state: - Vehicle shudders/vibrates on left turns, most often when accelerating from a stop or entering a driveway. - They feel a pop or grind in the accelerator pedal when the vibration occurs. - They hear a rumbling or grinding noise, mainly from the right side, during the left-turn shudder. NOTE: The condition does not occur at shallow steering angles or when the vehicle is stationary and the steering effort remains unchanged when the vibration and noise are present. |
| MSP Warranty | 2026-01-04. Service campaign. ENGINE. Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email. |
| MSP66 Repair | 2026-01-04. Service campaign. ENGINE. Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email. |
| MSP66 Dlr Ltr | 2026-01-04. Service campaign. ENGINE. Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email. |
| MSP66 | 2026-01-04. Service campaign. ENGINE. Subject: Mazda Service Program MSP66 - Engine Warning Light Illumination with DTC P0DAB 2024-2026 CX-90 and 2025-2026 CX-70, with H3T M Hybrid Boost. Mazda Motor Corporation has decided to conduct a Mazda Service Programs (MSP66) for vehicles in the U.S. and U.S. Territories. Mazda vehicles sold in Canada and Mexico are also affected by this program and must be repaired if presented to your dealership. All vehicles in this program will be in “Open” status on December 15, 2025 concurrent with the announcement of this communication. MAZDA SALES AND SERVICE TEAMS - ACTION ITEM: There are approximately 7,000 vehicles in stock at U.S. Mazda dealers which must be repaired prior to delivery. All Mazda dealers must quarantine any affected new, used or Certified Pre-Owned in-stock vehicles until the repair is completed. Once completed, the car can be delivered, and the Warranty claim can be submitted later without penalty since the car has been repaired. The affected dealer list will be provided to your District Service Manager daily beginning with receipt of this dealer email. |
| SA-023-25c | 2026-01-04. Service bulletin. ENGINE; EXTERIOR LIGHTING; ELECTRICAL SYSTEM. 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 " ". Page |
| SA-058-25 | 2026-01-03. Service bulletin. ENGINE; POWER TRAIN; ELECTRICAL SYSTEM. The 7G large platform utilizes a new 8-speed automatic transmission. Due to changes in the parking lock mechanism, which is now hydraulically operated, the neutral range in the transmission can only be achieved if the engine is running (or “Ready-On” for PHEV). With this design, there is no provision to manually engage neutral. This can cause challenges to dealers, customers, or towing providers when a vehicle cannot start and can't move, usually due to a discharged (dead) battery. In the event that a vehicle cannot be started or achieve “ready-on”, wheel dollies must be used to allow the vehicle to be rolled and moved. NOTE: The following procedure is for moving vehicle around the service shop and not for towing purposes. Please reference the owner's manual for towing instructions. |
| SA-052-25 | 2025-12-05. Service bulletin. ENGINE; POWER TRAIN. 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. Examples of residue or seepage that may not be considered a leak and that may not require repair based on splash shield inspection. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.