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.
2011 Mazda 3 L4-2.5LFACTORY OEM SERVICE PROCEDURE
Advanced Key Disassembly/Assembly
ADVANCED KEY DISASSEMBLY/ASSEMBLY
1. Pull out the auxiliary key.
2. Insert a tape-wrapped flathead screwdriver into the notch in the advanced key and rotate it in the direction shown in the figure to open the advanced key.
3. Remove the battery.
NOTE:
- If the O-ring has come off, put it back in place before installing the battery.
4. Install the new battery (CR1620) with the negative pole facing down.
5. Align the upper and lower covers and close the transmitter.
6. Insert the auxiliary key.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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