Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSMAZDA20113 MAZDASPEED, 2.3 3REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 652 (SECURITY SYSTEM AND LOCKS SYSTEM)IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [WITH ADVANCED KEYLESS SYSTEM]NO. 7 PROGRAMMING PROCEDURE DUE TO SIMULTANEOUS REPLACEMENT OF IMMOBILIZER SYSTEM-RELATED PARTS (PCM, KEYLESS CONTROL MODULE, AND STEERING LOCK UNIT)NOTES

2011 Mazda 3 Mazdaspeed, 2.3 3

No. 7 Programming Procedure Due to Simultaneous Replacement of Immobilizer System-related Parts (PCM, Keyless Control Module, and Steering Lock Unit): Notes

2011 Mazda 3 Mazdaspeed, 2.3 3SECTION Notes

WARNING: This page is about a different car, the 2011 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

The engine cannot be started if any step or procedure is skipped. Perform all procedures in the order of the steps.
The menu and execution sequence of the M-MDS vary depending on the type of replaced unit and parts. Perform the procedures referring to the following table.

M-MDS menu

(1): Parameter Reset
(2): Ignition Key Code Erase and Program
(3): Program Additional card key
(4): Steering Lock Unit Programming

KEY PROGRAMMING PROCEDURE

Replacement part

M-MDS execution menu/sequence

Conditions

Keyless control module and PCM

(1)→(2)→(3)→(4)

Have two or more keys to be programmed after the replacement.
Have one or more card keys to be programmed after the replacement.

Keyless control module and steering lock unit⁽¹⁾

Keyless control module, PCM, and steering lock unit⁽¹⁾

PCM and steering lock unit⁽¹⁾

(1)→(2)→(4)

Have two or more keys to be programmed after the replacement.

⁽¹⁾	Because the steering lock unit is integrated with the ignition key cylinder, the key must also be replaced when replacing the steering lock unit.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.