6524A – Steering Gear – 2024 Mazda CX-90

January 18, 2024 NHTSA CAMPAIGN NUMBER: 24V022000

Loss of Power Steering Assist

Loss of power steering assist while driving increases the risk of a crash.

 

NHTSA Campaign Number: 24V022

Manufacturer MazdaeBay logo North American Operations

Components STEERING

Potential Number of Units Affected 43,752

 

Summary

MazdaeBay logo North America Operations (MazdaeBay logo) is recalling certain 2024 CX-90 vehicles. An assembly issue with the worm gear in the steering system may result in a sudden loss of power steering assist.

 

Remedy

Dealers will replace the spring engaging the worm gear and reapply grease to the gear teeth, free of charge. Owner notification letters are expected to be mailed March 18, 2024. Owners may contact MazdaeBay logo customer service at 1-800-222-5500 Option 6. MazdaeBay logo’s number for this recall is 6524A.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

 

Check if your Mazda has a Recall

 


Announcement of Safety Recall 6524A-2024MY CX-90-Sudden Increase in Steering Effort

MazdaeBay logo Motor Corporation has decided to conduct a Safety Recall on certain 2024MY CX-90 vehicles. Please see the description, model, year, and VIN range below for the vehicles in this campaign. There are 43,695 vehicles affected with this concern in the US.

Concern Outline: While driving, the customer may feel a sudden increase of effort when steering the vehicle. Sudden and unexpected change of steering effort while driving may increase the risk of a crash. A worm gear is incorporated in the steering gear assembly, which transmits the power assist generated by the power steering motor. The worm gear friction force may be excessive which results in increased force required to turn the steering wheel.

 

Suspension of Delivery – MazdaeBay logo Dealer Action Requested:

Currently, there are approximately 10,954 CX-90 vehicles in dealer inventory or in transit to dealers. All MazdaeBay logo dealers must quarantine any affected new, used, or Certified Preowned Owned (CPO) in-stock vehicle until the repair is completed. The affected dealer inventory list is available on MazdaeBay logo Global Service Support (MGSS) and was provided to your District Service Manager. The current inventory list will be updated weekly or bi-weekly on MGSS as needed.

Repair Outline: Dealers will reapply grease to the gear teeth and will replace a spring with an improved part that reduces the spring force to the worm gear in the steering gear assembly. This repair was validated at MNAO and there is ample time provided for this recall to complete the repair and take the required photos. Technicians will be required to take 4 clear photographs of specific steps in the repair and those photographs must be attached to the claim for Recall and Warranty claim review prior to acceptance.

 


REPAIR PROCEDURE
SAFETY RECALL 6524A

Safety Recall – 2024 CX-90 – Steering Gear Safety Recall

VEHICLE INSPECTION PROCEDURE-AND PREPERATION FOR REPAIR

 

 


Chronology of Defect on January 18, 2024
Sudden increase in steering effort on MY2024 CX-90
Mazda #6524A

November 24, 2022: MazdaeBay logo received the first field report, from Japan.

December 12, 2022: MazdaeBay logo received its second field report, from Sweden. MazdaeBay logo began to investigate this condition.

March 1~29, 2023: MazdaeBay logo identified the root cause. It was due to pushed out grease from the gear teeth.

April 6, 2023: MazdaeBay logo implemented a countermeasure for production vehicles, which modified the teeth shape of the worm wheel to allow for proper application of grease to the gear.

April 30, 2023: Service information was issued in Japan and Europe, where several failures occurred to ensure dealerships were informed of the remedy.

September 27, 2023: The same failure occurred on improved parts, which had the updated worm wheel gear teeth shape. Improvement parts were found to be inadequate.

October 13, 2023: MazdaeBay logo examined the failure mechanism using the previously improved part and considered further improvement to correct this condition.

October 27, 2023 ~ Nov 8, 2023: MazdaeBay logo received three field reports from the U.S.

December 11, 2023: MazdaeBay logo implemented the permanent countermeasure on production MY2024 CX-90 vehicles, which reduced the spring force applied to the worm gear. Excessive spring force caused grease to be pushed out from the gear teeth resulting in lack of oil film. This caused the sticking condition.

December 13, 2023: MazdaeBay logo continued investigations and confirmed this condition does not cause the steering to lock-up or bind. Furthermore, the driver will feel a momentary increase in effort to steer which feels like a sticky steering condition.

December 22, 2023: MazdaeBay logo received two additional field reports from the U.S.

January 11, 2024: As momentary sticky steering may cause a loss of vehicle controllability, MazdaeBay logo judged this condition as impacting vehicle safety. Therefore, MazdaeBay logo held a Quality Audit Committee meeting to review all available information to date and approved a proactive field action on certain MY2024 CX-90 vehicles.

As of January 11, 2024, MazdaeBay logo is not aware of any reports of accident or injury related to this concern. Also, as of this date, five field reports have been received by the United States and/or Territory markets.

 


1 Affected Product

Vehicle

MAKEMODELYEAR
MAZDAeBay logoCX-902024

 


11 Associated Documents

Defect Notice 573 Report

RCLRPT-24V022-8691.PDF 215.328KB

 


Remedy Instructions and TSB – Repair Procedure

RCRIT-24V022-3736.pdf 2834.217KB

 


Recall Acknowledgement

RCAK-24V022-1669.pdf 645.341KB

 


Miscellaneous Document – Warranty Information

RMISC-24V022-1400.pdf 329.544KB

 


Manufacturer Notices(to Dealers,etc) – Dealer Message re Announcement of Safety Recall 6524A- 2024MY CX-90-Sudden Increase in Steering Effort

RCMN-24V022-3193.pdf 632.327KB

 


Miscellaneous Document – Chronology of Defect

RMISC-24V022-0415.pdf 89.879KB

 


Remedy Instructions and TSB – Repair Procedures

RCRIT-24V022-0982.pdf 2882.287KB

 


Miscellaneous Document – Warranty Information

RMISC-24V022-0254.pdf 757.719KB

 


Manufacturer Notices(to Dealers,etc) – Dealer Letter re Repair Procedure Update

RCMN-24V022-1787.pdf 229.45KB

 


Remedy Instructions and TSB – Repair Procedure

RCRIT-24V022-1462.pdf 2669.092KB

 


Miscellaneous Document – Parts and Warranty Information

RMISC-24V022-8059.pdf 517.147KB

 


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