I just fixed this same problem.
Mazda 3 door lock problem.
The vehicle lock out prevention feature prevents you from locking yourself out of the vehicle.
Auto lock unlock function setting change using door lock switch.
Function number 3 is the factory setting for your vehicle.
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Order mazda 3 door lock actuator online today.
The problem is a half open door latch that won t let the door unlock.
European models all doors and the liftgate boot lid will automatically unlock if they are locked using the power door locks with any door open.
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Before you dive into removing your door try this.
The key fob for your mazda has a built in chip that s programmed so your security system will both recognize and accept it allowing you to open your doors.
The doors and the liftgate can be set to lock or unlock automatically by selecting any one of the functions from the following table and using the driver s doorlock switch on the interior door panel.
You obviously use your keyless remote to open your mazda door because it is convenient.
If all the doors are closed even though the liftgate boot lid is open all the doors will lock.
Mazda 2003 mpv door locks.
It happened to me 3 different times in a month so i got good at it.