2015 Ford Mustang Key Replacement

The 2015–2020 Mustang uses the same key setup, so everything on this page applies to those years too. The full picture is on the Ford Mustang key guide.

2015 Ford Mustang: key facts

Key type: Smart / proximity key
Push-to-start: Yes
Transponder chip: Varies by trim — we confirm by VIN
Programming: OBD
All keys lost: We can originate new keys on site

Push-button start and Intelligent Access are standard from the 2015 S550 launch (confirmed in Ford launch material and press coverage); the smart-fob chip family is our era knowledge, not verified this session. Proximity all-keys-lost can require an active-alarm adapter.

What kind of key does a 2015 Mustang use?

The 2015 model year is when the redesigned S550 Mustang arrived, and push-button start and Intelligent Access came standard with it. That means no traditional ignition key to turn. The car senses the fob nearby, unlocks when you touch the door, and starts when you press the button with your foot on the brake.

Inside the fob is a hidden mechanical blade. It slides out of the fob and works the driver's door lock when the fob itself is not responding. For an owner, this matters in two ways. First, a dead fob battery is not a lockout: the car may show a 'No key detected' message, but the emergency blade still opens the door. Second, the blade only gets you in. It does not start the car, because the starting part depends on the fob being recognized electronically.

The problems we hear about with this setup are fairly consistent: worn-out fob batteries, fobs that went through the wash or got soaked, fobs that were crushed in a pocket or under a seat, and the surprise of how much a lost smart fob costs compared with an older bladed key.

Can you copy a 2015 Mustang key, or do you need all-keys-lost service?

Both are possible on this car. The difference is the starting point, and it changes the work involved.

If you have at least one working fob, that is the easier situation. Duplication here needs the original key present, and the new fob is programmed to the car through the OBD port. Ford's process for this model year does not require NASTF SDRM access on our end, so it is not held up by a secure-database login.

If every key is gone, an all-keys-lost job is still possible. It is more involved. The car has no recognized fob to work from, so we have to work through the diagnostic port from scratch. On proximity-key cars like this one, an all-keys-lost job can also call for an active-alarm adapter, which is extra equipment we bring when the situation needs it.

Call (213) 577-1366 and tell us the car is a 2015 Mustang with push-button start. Mention whether you have any working fob.
Have your VIN ready. It is on the dashboard by the windshield and on the driver's door jamb sticker.
We come to you with a mobile van, or you can bring the car to our Westwood storefront at 10740 Wilshire Blvd.
We confirm ownership, cut or prepare the emergency blade as needed, and program the new fob through the OBD port.
We test the fob before we leave: door unlock, push-button start, and the emergency blade in the door lock.

Locked out or need a locksmith now?

We answer around the clock, every day of the year.

Call (213) 577-1366

What affects the cost of a 2015 Mustang key?

We don't quote numbers on a web page, because honest pricing depends on the situation. Here is what moves it:

Spare or all keys lost. Copying from a working fob is usually the more economical route. All-keys-lost takes more time and sometimes extra equipment.
The fob itself. Smart fobs cost more than older bladed keys, and the part you need depends on what your car takes.
Where the car is. If it can be brought to our storefront, that often takes the mobile trip out of the equation. If it can't move, we come to it.
Alarm state. A car with an active alarm during an all-keys-lost job can need the adapter mentioned above.
How many fobs you want. Programming a spare while we are already connected to the car is usually more sensible than calling us back later.
Fob condition. If your fob is only dead or has a worn battery, replacing the battery may solve it and a new fob may not be needed.

What we haven't verified, and what we do about it

Honesty matters here. Push-button start and Intelligent Access on the 2015 Mustang are confirmed from Ford's launch material and press coverage. The chip family inside the fob is a different matter. Our working knowledge points to a 128-bit chip in the Hitag Pro family, but we have not verified that for this model year, so we do not treat it as settled.

In practice, we confirm by VIN and in person before ordering or cutting anything. If your car turns out to differ from what we expect, we tell you plainly rather than guess. If a step turns out to be dealer-only for your particular car, we'll say so up front rather than let you find out later.

Wilshire Lock & Key has been in business since 1987, with a storefront and our own mobile vans, so the person who answers your call is part of the same company that sends the technician. David oversees the work. We serve 140 cities across Los Angeles and Ventura counties, and the phone is answered around the clock. California requires locksmith companies to hold a BSIS LCO license, and you should ask any locksmith you call for theirs.

Frequently asked questions

My 2015 Mustang says 'No key detected.' Am I locked out?

Not necessarily. That message often points to a weak fob battery. The hidden emergency blade in the fob still opens the driver's door. If the car won't start after you replace the battery, the fob may need attention, and we can look at it.

Do you need my original key to make a copy?

For this setup, yes: duplication needs the original key. If you don't have one, the job becomes all-keys-lost, which is still possible but more involved.

Can you make a key if I've lost every fob?

Yes. The car can be programmed through the OBD port with no working fob. On proximity-key cars, an active-alarm adapter is sometimes needed, so we plan for that when we hear the situation.

Will I need to go to a Ford dealer?

Not for the programming method this car uses based on our data. We don't need NASTF SDRM access for it. If we find a step on your specific car that only the dealer can do, we will tell you before any work begins.

Can a damaged or water-soaked fob be fixed?

Sometimes the battery or a cleaning is enough, but crushed or water-damaged fobs often need replacing. We can look at it and tell you which, rather than sell you a new one automatically.

Why is a Mustang smart fob so much more expensive than an older key?

The fob contains electronics for proximity detection and starting the car, and it has to be programmed to your vehicle. A plain bladed key has none of that. See our Ford key pages for other models.

Do you confirm the chip type before working on the car?

Yes. Our era knowledge suggests a 128-bit Hitag Pro family chip, but it is not verified for this year, so we confirm by VIN and in person. You can reach us through our contact page or by phone.

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Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.

Last updated 2026-10-11.