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 MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 586 (SECURITY SYSTEM AND LOCKS SYSTEM)IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [KEYLESS ENTRY SYSTEM]NO.1 ADDITIONAL KEY REGISTRATION PROCEDURE (USING TWO VALID KEYS) CONDITIONSPROCEDURE
2010 Mazda 5 Sport, 2.3 L, Standard
No.1 Additional Key Registration Procedure (Using Two Valid Keys) Conditions: Procedure
2010 Mazda 5 Sport, 2.3 L, StandardSECTION Procedure
WARNING: This page is about a different car, the 2008 Mazda 5. However, it is still accessible from the selected car via links, so may be relevant.
- Have one key (key 3) ready for registration.
- Using key 1, turn the ignition switch to the ON position.
- Verify that the security light illuminates for approx. 3 s and then goes out.
- Using key 1, turn the ignition switch to the LOCK position within approx. 4 s after the security light goes out.
- Remove key 1
- Repeat Steps 2- 5 using key 2.
- Repeat Steps 2- 5 using key 3.
- If additional keys need to be registered, repeat Steps 1- 7 in the same manner as key 3.
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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.