How to Start a Fiat with a Dead Key Fob
Starting Your Fiat
- But first, if you are still locked out, click here for help getting inside!
- Second, for video help, click here!
- Finally, if you need another manufacturer, click here.
Fiat models built after 2010 use the rounded key fob shown in the image. Place the “nose” side (side opposite of the mechanical key – its very sensitive to this) of the Key Fob against the Start / Stop ignition button (right) and push to operate the ignition switch.
Do NOT try to remove this button! We have actually seen an owners manual citing an older key and button. Do NOT remove the flush button. Simply press the button with the nose of the key fob!
We have a video here that will help.
Note: If you have made an attempt to start the vehicle without success, there may be residual pressure in the brake system and a new warning light may appear (left) or text message to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Or wait a few minutes and try again.
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY
The Key Fobs used in Fiat models built after 2010 are sleek and rounded (see the image to the right). Slide the mechanical latch at the top of the back of the Fob to the side and pull the emergency key out with your free hand.
In 2023, the Fiat 500X will be hiding its keyhole behind a small cap in the handle recess (see image). The cap is easily removed with a fingernail, using the access hole shown to the right. Once removed the use the mechanical key in the keyhole to unlock the door, and you’ll be inside.
In Chrysler and Dodge vehicles built prior to 2009 and using the rectangular-tipped key, the Engine Start / Stop button must be removed from the ignition switch for key fob use. With the ignition in the Lock position, insert the metal part of the emergency key (or a finger nail!) under the chrome button (above right) and gently pry the button loose. It comes away very easily. Note that the button itself appears to float 
just above the dash.
In 2023, Dodge introduced the Hornet model, and it uses a very different back-up start method. The key fob needs to be placed in the front cup holder (rightt). The fob may need to be removed from a key chain to make this work.
Retrieving the mechanical key
Even newer models, including Ram trucks, use an updated, flatter version of the key fob. The button is on the side, as denoted by the bottom arrow. The mechanical key is removed by once again pulling on the key ring end with your free hand.