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 MANUALSMAZDA20133 MAZDASPEED, 2.3L ENG VIN 3REPAIR AND DIAGNOSISELECTRICALHORNSINSTRUMENTATION/DRIVER INFOBLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION

2013 Mazda 3 Mazdaspeed, 2.3L Eng VIN 3

Blind Spot Monitoring (BSM) Control Module Removal/Installation

2013 Mazda 3 Mazdaspeed, 2.3L Eng VIN 3SECTION Blind Spot Monitoring (BSM) Control Module Removal/Installation

CAUTION:

If the BSM control modules are installed with the left and right modules reversed, a DTC will be displayed and system will enter the fail-safe function. Therefore, confirm that the left/right BSM control modules are installed correctly.

Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5] .)(See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI TURBO] .)(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0] .)
Remove the rear combination light. (See REAR COMBINATION LIGHT REMOVAL/INSTALLATION .)
Remove the rear bumper. (See REAR BUMPER REMOVAL/INSTALLATION .)
Pull the connector in the direction shown by the arrow (2) in the figure and remove it while pressing the tab in the direction shown by arrow (1).

Fig 1: Pulling BSM Control Module Connector
Remove the nuts.

Fig 2: BSM Control Module Nuts With Torque Specification
Remove the BSM control module.
Install in the reverse order of removal.
Perform the blind spot monitoring radar test. (See BLIND SPOT MONITORING (BSM) RADAR TEST .)

RENDER: 1.0x

NO RELATED

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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.