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 MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSSECURITY SYSTEM AND LOCKS SYSTEMIMMOBILIZER SYSTEM REPROGRAM PROCEDURE [WITH KEYLESS ENTRY SYSTEM]KEY REPLACEMENT

2008 Mazda 6 s Sport, 4D Hatchback, Standard

Key Replacement

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Key Replacement

NOTE:

Perform this procedure to erase a previously programmed key code and register a new key.
If a new key code is programmed by following this procedure, the engine will not start using the previously programmed keys. The keys need to be re-programmed.

Fig 1: Replacement Key
Courtesy of MAZDA MOTORS CORP.

Cut new transponder equipped key(s) if necessary.
Connect the SST (M-MDS).
Using key 1, turn ignition switch to the ON position.
- Valid key: The security light illuminates, then turns off after approx. 3 seconds.
- New key: The security light flashes rapidly for approx. 1 minute and start displaying the DTC 15 (M-MDS: DTC B1601).
1. Perform security access approval. (See SECURITY ACCESS PROCEDURE ).
2. Select "Ignition Key Code Erase".
  NOTE:
  - Do not select any other command from this menu.
3. Turn key 1 to the LOCK position for more than 1 second.
4. Turn key 1 to the ON position for more than 3 seconds.
  NOTE:
  - Security light will remain illuminated as long as key is in the ON position.
5. Remove key 1 from the steering lock.
  NOTE:
  - After approx. 1 minute security light: DTC 21 (M-MDS: DTC B1213) is output
Using key 2, turn ignition switch to the ON position for more than 3 seconds. Observe that security light illuminates (for approx. 3 seconds).
1. Verify that the security light is not illuminated, then turn key 2 to the LOCK position and remove from the steering lock.
If there are 3-8 keys (valid and/or new keys), repeat Step 4.
Verify that the engine starts using the programmed key.

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.