Mustang Mach-E 12V Software Recall FAQ

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Hi Mustang Mach-E owners. By now many of you have received a notification regarding a recall on your vehicle involving the 12V battery. As there has been several mentions of the 12V battery in recent updates, the team at Ford want to ensure you have the information you need.

UPDATE (9/6/25): Software is now available for MY21-25 vehicles. To have it installed, contact your local dealer.

UPDATED WITH HOW-TO VIDEOS:




Why is there a recall on Mustang Mach-E?

In the event of an unexpected 12V battery failure when the vehicle is turned off, the electronic door latches remain in their last lock/unlock status. If the electronic door latches were locked at the time of 12V battery failure and a driver or front seat passenger exit using the door release handles, the doors will remain locked when they are re-closed. This may result in an unexpected lock-out condition for the driver or a front seat passenger without the ability to immediately re-enter the vehicle.

What is the safety risk?
This may result in an unexpected lock-out condition for the driver or a front seat passenger without the ability to immediately re-enter the vehicle. An occupant who remains inside a locked vehicle and unable to use an inside door release handle may be unable to be rapidly retrieved by a passenger who has exited the vehicle. This could result in a serious injury, especially in hot weather.

Which vehicles are impacted?
All Mustang Mach-E model year vehicles built prior to June 3, 2025.

How will my vehicle be fixed?
This issue must be fixed at your local Ford Dealer via a software update.

When will my vehicle be fixed?
2021 - 2025 Model Year Vehicles – The update is available, you will receive a letter in the mail with instructions to have it installed at your local Ford Dealer.

Do I have to go to the dealership for the software update?
Yes, currently this software update must be completed by a Ford Dealer. Ford is developing an over-the-air update will be available at a later date.

How long will it take to fix my vehicle?
The update is expected to take less than a day. You can contact your local Ford Dealer to understand their service wait times when the software is available.

Who is paying for this update?
This service is being performed at no charge to the vehicle owner.


Can I get stuck in my vehicle? If the doors are locked and the 12V battery fails, how do I exit the vehicle?

If you are able to operate the interior door handle, you can exit the vehicle.
Front Doors - Pull the door release handle until it stops (note: this means pulling the door release handle further than is usually required to open the door).
Rear Doors – Pull the door release handle twice. If a rear door is used to exit the vehicle, that door will unlock, and the supercapacitor will allow for limited re-entry times using the exterior button.

How do I re-enter the vehicle if the 12V battery fails?
You can re-enter the vehicle by jump-starting or replacing the 12V battery. Reference the customer support article at https://go.ford/MME12V for instructions on how to access and jump-start the battery if it has failed. If a rear door is used to exit the vehicle, that door will unlock, and the stored electricity within the electronic door latch will allow re-entry for a limited time using the exterior button.


Will FordPass app notify me or warn me that my 12V battery is at risk of failing?

FordPass will notify you if the 12V battery may be at risk of failing. A “Vehicle Health - Needs Attention” banner will be displayed with alert details “12-Volt Battery Advanced Diagnostic 1.0”. Upon seeing the alert, customers should take their vehicle to a dealership for service.

I received a “12-Volt Battery Advanced Diagnostic 1.0” alert in FordPass app. What does this mean?
The “12-Volt Battery Advanced Diagnostic” health alert will appear when the vehicle reports degraded 12V conditions that may mean that the battery is at risk of depletion during a key-off event. When seen, you should go to a Ford dealership for 12V battery testing and replacement.

Will my vehicle notify me that the 12V battery failed before I exit my vehicle?
If the vehicle does not have power from the 12V battery, it is unable to provide a notification.

I had my 12V Battery replaced after I was notified but it's still showing in the app, what do I do?
If you had your 12V battery replaced after being alerted by FordPass, the warning may stick around for a couple weeks while the model "relearns" the new battery. The team is already working on refinements to have it relearn faster.


I got an over-the-air update regarding door locks. Does that take care of this recall?

No, this is a general update and unrelated to the recall. The over-the-air update some of you may have received would prevent the separate, future over-the-air update from creating a new concern.


We will continue to share information when available.
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Edited above but posting below, too. If you had your 12V battery replaced after being alerted by FordPass, the warning may stick around for a couple weeks while the model "relearns" the new battery. The team is already working on refinements to have it relearn faster.
 

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Is this update related to preparing for the recall update? 24 GT received yesterday.
Ford Mustang Mach-E Mustang Mach-E 12V Software Recall FAQ 1000013736
 
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Is this update related to preparing for the recall update? 24 GT received yesterday.
1000013736.jpg
No, this is a general update and unrelated to the recall.
 


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Is this recall something that I need to pay for? I just went to my dealership specifically because I had the 12 V battery recall and they want to charge me $250 for the battery and labor and $199 for diagnostics. Is that reasonable? I have a 2021 Mach E premium ext
 

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I should’ve said I had a 12 V battery warning and my dealer told me it was at 63%. I am three months out of the three year warranty.
 

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Ford, Thanks for the nice and complete write up follow-up on the recall.

Question: Why not do this in the first place when the recall was issued?!?!?!?


Do I have to go to the dealership for the software update?
Yes, currently this software update must be completed by a Ford Dealer. Ford is developing an over-the-air update will be available at a later date.
Question: WHY? If it can be done at the dealer with FDRS, then why can't it be done OTA?
 

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@Ford Motor Company - your FAQ doesn’t say what this recall software update actually does or how it “fixes” the 12v battery issue. Can you elaborate?

There are a number of problems with the 12v battery design, at least one of which cannot be fixed with a software update.

To start, the 12v battery appears to be either under-spec’d for the demands of the electronics in this vehicle, or the battery management software (the EV version of an alternator) is not keeping the 12v adequately charged. There is absolutely no reason why these 12v batteries are routinely failing between 3-4 years. Does your recall make changes here?

Second, burying the 12v (1) under plastic cladding and a stabilizer bar (2) in a frunk that is very difficult to open if the battery dies, is STUPID design. In fact, rather than try to describe the Rube Goldberg procedure for getting the frunk open if the battery dies, your FAQ simply includes a link to the instructions, which speaks to the complexity.

You evidently were unconcerned with location of the 12v because your then lead engineer on the Mach E project, Darren Palmer, proudly boasted this…

Ford Mustang Mach-E Mustang Mach-E 12V Software Recall FAQ 1752168872809-sq


And yet, 5 model years later you have not fixed this design.
 

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Ford, Thanks for the nice and complete write up follow-up on the recall.

Question: Why not do this in the first place when the recall was issued?!?!?!?




Question: WHY? If it can be done at the dealer with FDRS, then why can't it be done OTA?
Well… maybe because Ford doesn’t say what the recall software does, what modules are updated, etc. I wouldn’t call this a “complete write up.”
 

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Is this recall something that I need to pay for? I just went to my dealership specifically because I had the 12 V battery recall and they want to charge me $250 for the battery and labor and $199 for diagnostics. Is that reasonable? I have a 2021 Mach E premium ext

I should’ve said I had a 12 V battery warning and my dealer told me it was at 63%. I am three months out of the three year warranty.
The recall is a software update, and will be free.

12V battery replacement is NOT part of the recall, it is a maintenance item. Since your battery is out of warranty, you will have to pay for the replacement. Do not pay the diagnostic fee, just the $250. The battery itself costs $130 if you want to replace it yourself.

@Ford Motor Company - your FAQ doesn’t say what this recall software update actually does or how it “fixes” the 12v battery issue. Can you elaborate?

There are a number of problems with the 12v battery design, at least one of which cannot be fixed with a software update.

To start, the 12v battery appears to be either under-spec’d for the demands of the electronics in this vehicle, or the battery management software (the EV version of an alternator) is not keeping the 12v adequately charged. There is absolutely no reason why these 12v batteries are routinely failing between 3-4 years. Does your recall make changes here?

Second, burying the 12v (1) under plastic cladding and a stabilizer bar (2) in a frunk that is very difficult to open if the battery dies, is STUPID design. In fact, rather than try to describe the Rube Goldberg procedure for getting the frunk open if the battery dies, your FAQ simply includes a link to the instructions, which speaks to the complexity.
Perhaps Brian could add this to the original post, but the recall software update fix will leave the DC/DC converter on for 12 minutes after the vehicle is shut off. This will provide 12V support to the door latch modules during the typical entry/exit period after shutdown, which will prevent the specific lockout issue in case the 12V battery has failed during the drive.

The 12V battery is the appropriate size and specs for an EV, which does not need to crank an engine. Some EVs use much smaller batteries (Rivan uses a battery half our size, and Tesla uses one 1/5th the size). A larger battery would not be a fix. The issue is more so with key-off loads and the management of the 12V battery, which has improved with software, but there will still be a small random failure rate of AGM batteries even if everything is done right. The recall software makes the vehicle more robust in case of a random 12V failure.

I agree the access could be better, but in most cases the battery will only need to be accessed once every 3-5 years for replacement. Sticking 12V batteries in difficult places is hardly unusual in the automotive industry these days; there are a bunch of cars that have the 12V battery under a seat, in the front fender, or in the trunk. If anything, Ford should provide more readily accessible jump points that don't require panel removal, which some owners have rectified themselves by drilling access holes.

The new "Check 12V battery" warning message should also help prevent as many lockouts from occurring—now we have an early warning to replace the battery before it gets to the critical point of failure. Overall I'm satisfied with the changes, and I think the lockout rate will go down significantly so we won't have to worry about it.
 
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Interesting about the solution being the DC/DC converter staying on for 12 minutes after turning off the vehicle.

How they arrived at 12 minutes is a mystery.
Other makes keep the DC/DC converter on 30 minutes to an hour at times.

Why only 12 minutes?
 

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