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 481 (SECURITY SYSTEM AND LOCKS SYSTEM)IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARINGNO.5 RESETTING PROCEDURE FOR THE IMMOBILIZER SYSTEM WHEN REPLACING THE PCM OR KEYLESS CONTROL MODULE CONDITIONSNOTES
2011 Mazda 3 Mazdaspeed, 2.3 3
No.5 Resetting Procedure for the Immobilizer System when Replacing the PCM or Keyless Control Module Conditions: Notes
2011 Mazda 3 Mazdaspeed, 2.3 3SECTION Notes
WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- When only replacing the PCM: No conditions.
- When only replacing the keyless control module: Customer has two or more keys for registration after replacement.
- PCM and keyless control module replaced at the same time: Customer has two or more keys for registration after replacement.CAUTION:
- When replacing the PCM and the keyless control module at the same time, follow the same instructions described in the procedure for "when replacing the keyless control module".
- When replacing only the PCM, start from Step 2. Also, when key 1 is indicated within the procedure, any valid key can be used.
- Before starting Step 1, complete the procedure for PCM and keyless control module replacement.
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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.