How to Start a Hyundai, Genesis or Kia with a Dead Key Fob
Starting Your Hyundai, Genesis or Kia
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Hyundai, Genesis and Kia use no less than seven different ways to start the vehicle if the Smart Key is weak or the Smart Key does not work correctly. However, the companies are migrating all their models to Method 6, smartly standardizing the process. That is until Genesis seemed to take a step back in 2021.
And if your start battery is still good, we’re going to get you going! Just follow along.
The latest models from all three manufacturers — with two exceptions — have a much simplified process. Staring with vehicle updates in the 2013 model year, simply press the Start / Stop ignition button with the Smart Key while depressing the brake to start the vehicle. We originally named this the back up start Method 6. If this does not work in your model, continue on below for a method that will.
The exceptions noted are first, an EV button (far left) in Kia EVs. It is pushed just like the Start / Stop button. The second exception is the 2021 Genesis G80, which is now a Seventh Method. This method has moved to the 2022 GV60 EV as well, and may yet be placed in other models. If the vehicle does not recognize the key fob or Smart Key, slip the Smart Key into the space behind the shifter dial and cup holders and in front of the leather of the console. See the second image to the left. Then, step on the brake and push the Start / Stop ignition button to start the vehicle as normal.
We must also add an Eighth Method, which is digital. In the new GV60, G70, GV70, G80 and G90, a registered smart phone or a pre-registered card key can be placed on the vehicle’s wireless charging pad. It is found in front of the center console storage area (left). Once in place, the vehicle can be started as normal.
The Kia Forte, Sportage, and Sorento and Hyundai Sonata (prior to 2014) use Method 1. Insert the Smart Key in the Smart Key holder, which is a slot inside the center console, then press the Start / Stop ignition button while depressing the brake. To remove the Key, press it, then pull. Check out the video below.
The Kia Magentis also uses a slot in the center console in Method 2. Insert the Key and then press the Start / Stop ignition button while depressing the brake. To remove, press the Smart Key inward past the detent and then pull it outward.
The Hyundai Genesis, built before 2014, uses Method 3, which is a slot located behind a door above the shifter. Insert the Key and then press the Start / Stop ignition button while depressing the brake. To remove the Key, press it and then pull it out.
The Kia Optima (prior to 2014) and Soul and Hyundai Equus use Method 4, which is a slot in the glove box. The slot is a little higher in the Equus. Insert the Key and then press the Start / Stop ignition button while depressing the brake. To remove the Key, press it and then pull it out.
The Kia Borrego uses the Method 5 slot, which is in the dash just below the Start /Stop ignition button. It should be readily visible. Insert the Smart Key and then press the Start / Stop button while depressing the brake. To remove the Key, release it by pressing and then pull it out.
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.
Video Help
Click here for videos to walk you through the processes.
… Return to Part I, Getting In
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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
There are three general styles of key fobs in use with Volkswagen and Audi models. With the older style shown to the right, press the chrome button on the back of the key fob (remote control or ‘clicker’) to release the spring-loaded mechanical key, which remains attached to the key fob.
Newer Volkswagen and Audi models use what they called an Advanced Key, shown to the left. The mechanical key is separated 
from the fob (or remote control or ‘clicker’) by pressing the button on the back side of the fob, shown with the arrow, while pulling on the same key ring end.
And yet a fourth key fob from Audi has a chrome button on the back, similar to the unit above, but below the chrome end. push the button and pull on the key ring end to remove the mechanical key. We saw it first in the new 2019 Q8.
For the Karma model, press the button on the reverse of the key fob (remote control or ‘clicker’) and slide the emergency key blade or mechanical key free (right image).
which could make getting to the next step very difficult while an alarm is blaring.
Place the Fisker logo on the back of the fob against the light colored strip in the center of the driver’s door handle roughly where the arrow is pointing (right). It may need to be moved a half inch one way or the other. The handle will detect the key fob and will extend to the open position.
As we noted, beginning with the 2016 Volvo XC-90 redesign as well as all Polestar models, a new style key fob is used (right). To retrieve the mechanical key or key blade, look for a slide lever on the top of the key ring end of the fob. This will free the front cover, which needs to be removed.
To do this, push the cover slightly down and away from the key ring end. It can then be pulled up and out, exposing the mechanical key. The key blade can then be lifted out.
With the previous generation key fobs, the is pulled away from the fob rather easily. Slide the spring loaded catch on the back of Remote Key (remote control or ‘clicker’) to the side. Pull the key blade straight out of the remote key. On some models, the lock cylinder (keyhole) at the back of the door handle will be visible. If so, use the key blade to unlock the door. See below if the key hole is hidden.
With the first generation Remote Key, a similar spring loaded catch will be found on the top of the fob, on the key ring end. As with the fob above, slide the catch to the side and pull the mechanical key away. Again, the lock cylinder (keyhole) at the back of the door handle may or may not be visible. See below if the key hole is hidden.
In the Volvo XC-90 and other redesigns going forward since 2016, as well as the Polestar 2, the key hole is also hidden, but easily found and nothing needs to be removed. Simply pull the door handle out as far as possible and the key hole is exposed, as shown in the image.
The Polestar 1 features a door handle that is flush to the car’s body. Push the front of the handle inward and pull away the back, as seen to the right. The key hole is now exposed. As above, insert the mechanical key and turn it clockwise to unlock. Remove the key blade and release the handle. Pull the handle once again and you are in the car.
A mechanical key is not available to unlock the Polestar 3 or Polestar 4. The smart phone app or the vehicle’s key card will be needed. With the Polestar 3, the card is touched to the front of the driver’s door handle (right). With the Polestar 4, the card is touched to the middle of the door pillar just behind the driver’s door (far right).
Press the key blade about a half inch straight up in the hole on the underside of the keyhole cover (right), found at the back of the driver’s door handle. This action will force off the cover. If you are in the dark, you may need to feel for the hole. Yes, you must remove a piece of the car, but it is ok and necessary. Use the mechanical key in the now-exposed lock to unlock the driver’s door.
Four key fob (remote control or ‘clicker’) versions may be seen in Toyota, Lexus and Scion models. The earliest version (left), used only in the Lexus LS for a few years, the mechanical key remains attached to the key fob. Pull the latch found on top of the fob. At the same time, slide the lever on the side upward until the key blade is fully exposed.
The mechanical key is removed from the remaining fob styles. Slide the catch on the top of most Lexus key fobs, or on the side of Toyota and Scion models. Some later 
Lexus models use this key as well. Pull the key ring from the fob while the catch is slid to one side to remove the emergency or mechanical key blade.
A slight variation in even later Lexus models has the slide lever on the top of the key ring end, but not on the mechanical key itself. Slide the lever and pull the key ring away to retrieve the mechanical key.
If the keyhole is not visible, insert the mechanical key into the slot at the base of the door lock cover located near the back of the driver’s door handle and lift slightly to pry away the lock cover and expose the lock cylinder. If you are in the dark, you may need to feel for the slot. Yes, you must pry off a piece of the car. Insert the key blade into the now-exposed lock cylinder to operate. The key can only be inserted in one direction, so turn the key over and try again if it does not go in the first time.
If you do not see a seam or a keyhole, you have the latest Lexus models, the NX, UX and RC as well as RX models built after 2016. This door handle style has since been incorporated into ES and LS models. Pull the driver’s door handle out as shown in the image to expose the keyhole. Insert the mechanical key and turn and you’re in. There is only a small amount of space, so actually turning the key can be a chore.
If you are fortunate enough to own the Lexus LC models, the door handles are flush to the body. Press the front of the driver’s door handle inwards, then pull the rear of the handle out. The key hole is then exposed behind the rear portion of the handle. As above, insert the key and turn and you’re in.
Finally, with the re-introduced Toyota Supra in 2020 come open and start features clearly taken from BMW! The key hole is hiding behind an oval shaped cover at the back of the driver’s door handle. Pull the door handle out and feel for a metal clip is behind the cap and give it a push outward.
The cap will practically fly off revealing the key cylinder. You are still removing a piece of your car and its still ok! Let go of the handle and use the mechanical key to unlock the door using the key cylinder that is now visible through the handle and you’ll be inside.
New in 2023, Lexus NX, RX, RZ and TX feature a rectangular pry off cover (right) at the back of the driver’s door handle. Slip a credit card or some equivalent into a gap at the front of the cover and pry the cover outward. When the cover clears the handle, push it from the rear to remove it fully. The key hole will then be exposed.
the lock knob at the back of the Intelligent Key (remote control or ‘clicker’). Use the mechanical key in the driver’s door key cylinder to unlock the door.
The second key fob is the spitting image of the fob used by the Mercedes-Benz folks for years. A few old Chrysler Corp. (now FCA) vehicles use it too.
As noted, the key hole on nearly all Nissan and Infiniti models is visible at the back of the driver’s door handle, and the mechanical key can be used to unlock it. Two exceptions to this are the Nissan GT-R and the Infiniti QX80. The key hole is a bit hidden, behind the front of the driver’s door handle and a cap that must be removed.
To access the key hole, press the rear end of the driver’s door handle to lift up the front end, just as you would normally to get inside. Note the cap shown in the image (above right, A). While holding the door handle out, use the mechanical key and turn the cap counterclockwise to remove it. Once removed, the key hole is exposed and the mechanical key can at last be used to unlock the driver’s door (above right).
In the 2025, the QX80 offered a new feature — flush door handles that extend when the key fob approaches the vehicle. If the battery in the fob is weak or dead, this will not occur. Getting to the key hole is a process similar to that for the GT-R. Press the front of the door handle inward. This rotates the rear of the handle outward (right, upper). The handle can then be pulled open. Do so as far as it will go exposing the key hole beneath the back of the handle (right, lower). You can now use the mechanical key to unlock the car.
Mercedes-Benz now features two SmartKey styles. The original and most common style is tapered, like the one shown to the right. To retrieve the mechanical key, slide the release catch found near the top of the fob in the direction of the arrow and pull the mechanical key away from the SmartKey (remote control or ‘clicker’).
In 2017, a second, rounded SmartKey style was introduced in the E-Class sedan, and is shown to the right. It migrated to S-Class sedans in 2018 and is found in all 2018 E-Class models.
In 2021, another key fob was added to the S-Class Maybach that looks similar and operates very similarly. It is a little more tapered at the key ring end. Again, push the button on the back and remove the mechanical key.
Make sure the handle of the mechanical key is pointed away from the paint. Insert the key into the opening (black arrow) underneath the cap as far as it will go. Hold the door handle out. Pull the cap that is now on the mechanical key as straight as possible away from the vehicle until it releases.
The 2021 Maybach adds flush door handles. This has now been added to AMG and EQS models in 2023, EQE, E-Class, S-Class and C-Class models in 2024.
Finally, the 2023 CLE Cabriolet and 2024 GLC models employ yet another method to hide the key hole. Pulling the driver’s door handle to the open position reveal the key hole underneath the back of the handle. Simply insert the key and turn and you’ll be inside. And yet again, the alarm will likely sound, but it will go off when the car is started.