Three problems related to owners/service manual have been reported for the 2013 Ford Flex. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Ford Flex based on all problems reported for the 2013 Flex.
My vehicle's "door ajar" sensor will not turn off even when all doors are securely closed. This is resulting in my lights staying on for a very long time and the worst thing is that my doors won't stay locked at anytime. What's happening now is that when I lock the doors after exiting the car, the alarm will go off after a certain period of time, therefore, I have to leave the car unlocked or keep an ear out for it. I have tried manually locking the doors while I'm driving and the door locks will automatically unlock themselves. I don't feel safe knowing that someone could just jump in my car or open one of my back doors where my two children sit. I'm also fearful of my battery dying as a direct result of my dome lights staying on for such a long time every single day. I'm dreading the thought of this happening while with my kids and being left stranded. I wish Ford would take this issue more serious. There is absolutely no need for something tragic to happen in order for corrective action to be taken.
Door sensor working intermittently on passenger side. Especially when cold outside, passenger door is closed but car thinks it is open, will not allow automatically locking of doors, which represents a safety hazard. Doors can be locked manually but all doors remain unlocked or spring unlocked when "door lock" switch is pressed.
The driver side door does not lock. The mechanism that recognizes that the driver side door is closed doesn't work. When the car is turned on and subsequently when the vehicle comes to a stop or very slow speed (like a stop sign or light) the alarm sounds again (a pinging sound with a visual alert that the door is open with an message to shift to park). However, no matter how many times the door is opened and shut, the alarm doesn't go off. This means that doors do not automatically lock when the car is put into gear. When the vehicle attempts to automatically lock the doors when the car is put into gear, the lock immediately snaps back up because of the door warning. Even manually locking the door doesn't work because of the alarm. This is a safety concern both when driving but also when stationary. I want to be able to lock my car doors in the event there are safety concerns nearby so that no one can get into the car while we are in a parking lot or at a light. I mentioned this to the Ford dealer while the car was still under warranty but they said they would charge $300 just to look at it.