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)KEYLESS CONTROL MODULE REMOVAL/INSTALLATION

2011 Mazda 3 Mazdaspeed, 2.3 3

Keyless Control Module Removal/Installation

2011 Mazda 3 Mazdaspeed, 2.3 3SECTION Keyless Control Module Removal/Installation

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 replacing the keyless control module, perform the following procedure:
- KEYLESS CONTROL MODULE CONFIGURATION (See KEYLESS CONTROL MODULE CONFIGURATION .)
Disconnect the negative battery cable.
Remove the front side trim. (See FRONT SIDE TRIM REMOVAL/INSTALLATION .)
Remove the nut and screw.
Remove the connector clip installed to the bracket by shifting the keyless control module downward.
Disconnect the keyless control module connector.

Fig 1: Removing Keyless Control Module, Nut, And Screw
Courtesy of MAZDA MOTORS CORP.
Push the stopper with a small screwdriver and remove the bracket in the direction shown by the arrow.
Install in the reverse order of removal.
When replacing the keyless control module of vehicles with the immobilizer system, perform the following procedure:
- IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING .
- Transmitter ID code change (See TRANSMITTER ID CODE CHANGE .)
Fig 2: Pushing Stopper With A Small Screwdriver
Courtesy of MAZDA MOTORS CORP.

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.