NHTSA ID Number: 11028133
Manufacturer Communication Number: SA-005-26
TSB/Document Date: 2026-02-03
Summary
There are currently 2 methods for cutting a new auxiliary key blank. A. Auxiliary Key Trace Cut Method • B. Auxiliary Key Code Cut Method 2019 and newer models require a 10-digit key code to accurately cut keys • 5-digit codes CANNOT be provided for 2019 and newer vehicles (the traditional 5-digit code from the key tag or driver's door lock cylinder is not sufficient and will not be issued for key cutting on these models). • Only Mazda
-approved key cutting machines can process these 10-digit codes. • Many older key machines do not support 10-digit codes and cannot be updated to do so. In these cases, dealers will need to purchase one of the newer Mazda-approved key cutting machines capable of handling this requirement. • For a list of current Mazda-approved machines and purchasing options, refer to the Mazda Dealer Equipment Program or view the current Mazda approved key machines below.
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TSB/Document ID: SA-005-26
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem: Auxiliary Key
Previous TSB | Next TSB |
BULLETIN NOTES
This Service Alert supersedes the previously issued SA listed below. The changes are noted in Red text.
Previous SA
Date(s) Issued:
Previous SA
Date(s) Issued:
SA-053/24
08/12/24
SA-030/21
06/15/21 and 05/04/21
SA-016/23
03/21/23
SA-004/20
12/14/20, 07/06/20, 05/11/20
and 01/19/20
SA-016/22
04/04/22 and 12/07/22
SA-045/19
10/30/19
APPLICABLE MODEL(S)/VINS
2013-2026 CX-5
2016-2021 CX-3
2020-2026 CX-30
2024-2026 CX-90 (All)
2014-2026 Mazda3
2016-2023 CX-9
2022-2023 MX-30
2025-2026 CX-70 (All)
2014-2021 Mazda6
2016-2026 MX-5
2023-2026 CX-50 (All)
DESCRIPTION
There are currently 2 methods for cutting a new auxiliary key blank.
• A. Auxiliary Key Trace Cut Method
• B. Auxiliary Key Code Cut Method
Auxiliary Key Blank
NOTE:
• 2019 and newer models require a 10-digit key code to accurately cut keys
• 5-digit codes CANNOT be provided for 2019 and newer vehicles (the traditional 5-digit code from the key tag or
driver's door lock cylinder is not sufficient and will not be issued for key cutting on these models).
• Only Mazda-approved key cutting machines can process these 10-digit codes.
• Many older key machines do not support 10-digit codes and cannot be updated to do so. In these cases, dealers
will need to purchase one of the newer Mazda-approved key cutting machines capable of handling this
requirement.
• For a list of current Mazda-approved machines and purchasing options, refer to the Mazda Dealer Equipment
Program or view the current Mazda approved key machines below.
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01/27/2026 12:15 PM tlawrenc
REPAIR PROCEDURE
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.
2. Obtain the key code:
Key Type
Key Code
eMDCS
Obtain 5-digit key
number.
NOTE: Key code is also availble on key tag and Drivers door key lock cylinder
Obtain 10-digit
key number.
NOTE: 5-digit key number on key tag and Drivers door key lock cylinder cannot be
used to cut an auxiliary key blank.
NOTE: For the Pro Master Plus Machine, a new enter key must be inputted prior to the key code. Please input this code
in order to proceed with using the key code.
• MZH1 for the 5000 series key code
• MZU1 for the 20000 series key code
Code Series
Input Code
5000
MZH1
20000
MZU1
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01/27/2026 12:15 PM tlawrenc
LOCK
APPLICATION
KEY CODE
RANGE
CODE SERIES
# TUMBLER
POSTITIONS
STANDARD
KEY
Master
Cut by Depth
50000's
10
MZH1
Master
Cut by Depth
20000's
10
MZU1
3. Cut the new auxiliary key blank(s).
NOTE: If the drivers door key cylinder is damage due to theft/accident, the drivers door lock set is not covered by
warranty policy.
a. Replace the drivers door lock set. Go to MGSS (FRONT DOOR KEY CYLINDER REMOVAL/INSTALLATION).
b. Update the KEY CODE in eMDCS by contacting Mazda Warranty via phone (800-727-6626, option #3) M-F 7am 4pm PT or by email ([email protected]) and provide the VIN and replacement door lock cylinder
KEY CODE so that the new drivers door lock set key code can be updated in the eMDCS system.
Replacement Drivers Door Lock Set, Key Code Locations
5 digits
4 digits*
*Just add “5” as the 1st digit to make the 4-digit to 5-digit
Page 3 of 4
01/27/2026 12:15 PM tlawrenc
Transportation Lock-out Procedure
Auxiliary keys are locked in the vehicle upon receiving.
1. Perform B. Auxiliary Key Code Cut Method .
NOTE: Only one auxiliary key is necessary to cut in order to enter the vehicle.
2. After retrieving the auxiliary keys from the vehicle, dispose of the newly cut auxiliary key.
3. Submit transportation claim in eMDCS. Claim will be submitted for the creation of the new auxiliary key.
NOTE: Claims may be rejected if above procedure is not followed.
For the PC+ Flash Machine, a new enter key must be inputted prior to inputting the key code:
• MZH1 for the 5000 series key code
• MZU1 for the 20000 series key code
Mazda Approved Key Cutting Machines
Supplier
Model
MSC
Available at
Pro-Source Key Machine
User Manual
Click Here
Mazda Tool and Equipment Website
Part # 425-MSC-KM
KEYLINE
GYMKANA 994
Click Here
Mazda Tool and Equipment Website
Part # KYLGYMKANA
Page 4 of 4
01/27/2026 12:15 PM tlawrenc
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