Hyundai Forums banner

Hyundai's flawed smart key fob design & how to fix

36K views 24 replies 14 participants last post by  Red Raspberry  
#1 ·
I come here to rant, but also offer a suggestion.

Owner of a 2015 Sonata Limited. About six months after we got the car (so, around mid-2015) my wife looked at her key chain one day and noticed the Hyundai valet key with no fob attached to it. We looked everywhere but the fob was nowhere to be found within our house, and has never reappeared since. It must have come off somewhere in public.

I came to discover from looking at the other fob (the one I keep on my chain) and from browsing the forums here that there is a major design flaw in Hyundai's fobs, seemingly going back several years and spanning multiple models including the Santa Fe. The valet key is released from a raised button that can easily be pressed by accident, especially by other keys on your keychain. If this happens at an inopportune time then you will lose the fob without even noticing it.

Compare, for example, a Honda key fob, and the valet key is released from a sunken button that cannot accidentally be pressed.

What's more:

  • Replacement fobs are extremely expensive, about $250 for the part alone, plus about $60-$75 for reprogramming. (Thankfully the laser key doesn't need to be recut in this case -- that would be an additional $100 or so.) This is much more expensive than replacement fobs for similar cars such as the Accord.
  • It is not possible to reprogram a used fob, so no buying fobs on ebay.
  • It's not even possible to "flash" a used fob from a key fob flashing service. These services are explicitly for fob types that are not supposed to allow reprogramming. As a test I got a used fob on ebay for $20 and sent it to such a service who swore on the phone that they could handle a 2015 Sonata. They eventually sent it back saying "nope, can't flash that kind".
  • Hyundai refuses to acknowledge this problem. Both corporate and every dealer I spoke to said "We can't fix a part on warranty if you don't have the part", and refused to accept the flawed design argument.
How Hyundai has continued to make these flawed fobs for years now is beyond comprehension and honestly if I had the time I would try taking them to court. Search around and you will find lots of complaints from people who have lost their fobs this way.

So the solution? Took my Dremel and grinded down the button (while the key was separated) until it was sufficiently sunken. Now the valet key -- which by the way I never use when valet'ing, don't know anyone who does -- should never pop off. Picture attached of the fix.

Grrr ... rant over.
 

Attachments

#3 ·
Nice idea and implementation.

Although I wouldn't call it a design flaw. Since never having to use a key to start the car, it is only ever in my pocket, by itself, where it does not come into contact with anything that could potentially press buttons or scratch the crap out of it. House keys have their separate pocket and caribeaner.

Now I'm not trying to pick on anyone but knowing the fobs are super expensive to replace, that is even more of a reason to not have a $350 key just dangling around on a key chain where it can end up lost as you've unfortunately experienced. But your way of resolving it to work better for you is very thoughtful.
 
#4 ·
Although I wouldn't call it a design flaw. Since never having to use a key to start the car, it is only ever in my pocket, by itself, where it does not come into contact with anything that could potentially press buttons or scratch the crap out of it. House keys have their separate pocket and caribeaner.

Now I'm not trying to pick on anyone but knowing the fobs are super expensive to replace, that is even more of a reason to not have a $350 key just dangling around on a key chain where it can end up lost as you've unfortunately experienced. But your way of resolving it to work better for you is very thoughtful.
But that's my point -- this key has no business costing $350 to replace. Replacing a similar Accord key costs about $100 out the door. There is nothing special at all about this key that would justify the cost, and it has a flawed design. And just because it might not affect all people all of the time doesn't mean it's not flawed. There is no justification whatsoever for having a raised button. It's one thing to be paranoid about losing a key for the usual reasons people lose keys but you shouldn't have to worry about the key being lost due to the incompetence of the company selling it.

If any one of these things weren't the case then it wouldn't be such a problem:

- Design is flawed due to raised button
and
- Replacement is unreasonably expensive
and
- Hyundai went out of their way to disallow reusing old keys

I would love to know of one other make and model of car where the key fob has all three of these issues.
 
#5 ·
Agreed. And you make many valid points.

For me tho from time to time I do use the physical key to lock the doors and leave the car running for a/c or heat when I need to leave my dogs in the car for short periods. If the button is recessed then I'd have to find something to insert in there to press it. So I can see it being useful to have it raised for ease of access as well as recessed for more security.

It's all subjective to the user requirements I suppose.
 
#11 ·
For me tho from time to time I do use the physical key to lock the doors and leave the car running for a/c or heat when I need to leave my dogs in the car for short periods. If the button is recessed then I'd have to find something to insert in there to press it. So I can see it being useful to have it raised for ease of access as well as recessed for more security.
I like to be able to leave the fob in the running car sometimes too, but have a different solution for that: I use a keyring clip for the fob, making it easily detachable from my keys. If you're not sure what I'm talking about just google "keyring clip". There are a bunch of different kinds, some more secure than others.
 
#9 ·
I understand where the OP is coming from.... but there are other manufacturers that also have expensive fobs. One of my other cars has remotes that just fall apart. I don't even carry them with me, they are for my collectible Cadillac CTS-V wagon, but they just crumble away. Does it suck that they are pricey? Of course it does! It also sounds like they made a smart business decision by securing themselves a profit source on lost keys and fobs. I'm blown away that a used fob can't be wiped and reprogrammed... but it is what it is. I don't have my key/fob on a ring with other keys either.

I think the fob case is a great way to avoid separating the 2 pieces without knowing about it.

Your work-around of shaving down the release button is a great idea though!
 
#12 ·
To everyone defending the convenience of the button I point once again to the Honda key fob. Proof that you can have both convenience and a good design. Note how the button 1) is in a recessed "pit", and 2) is a sliding mechanism, which even further reduces the possibility of an accidental press. Could this still be accidentally engaged? Sure, but it's far less likely. The Hyundai release button can be accidentally pressed simply by grabbing a keychain with just a few keys plus the fob on it.
 

Attachments

#13 ·
I'm guessing that some of the hyundai keys are easier to remove that some. I've messed with both my fobs today and they both take some force to remove the physical key.

Was looking over my friends cruze key. Hers is push to start but her fob utilizes a switchblade style key that doesn't disconnect from the fob. That seems more logical than having a completely removable key.

Also what's the point of keeping the key and handing the valet the fob other than locking the trunk for security purposes? You retain the only part of the key which they would usually affix the id tag to. Seems they'd be more likely to lose it this way. Just my thoughts.
 
#16 ·
I think the Hyundai Key Fob is poor in several other respects. I hope Hyundai engineers and product people read these comments.

1. I carry my keys in my front pocket like most guys. If I bend over (usually to put on shoes near my garage door), I constantly set the alarm off because the button is on the bottom and very easy to push. This probably happens at least once a week. It would probably help if the design was thinner.
2. A few days ago, I barely started my car because the battery was low. There is no indication at all that the battery is low. It took a few tries before the car recognized the key fob. A better design could transmit the key status to the car much earlier, before it was an issue.
 
#17 ·
It would probably help if the design was thinner.
Solution is to buy a soft rubber protection cover available online. The cover recesses the buttons and makes it harder to press accidentally.

There is no indication at all that the battery is low.
You should get a dash light that says key battery is low - at least on mine that's what happens.
 
#21 ·
If your 2020 Tucson is like the 2015-2019 Sonatas, you cannot lock the doors with the manual door lock switch if the FOB is inside the vehicle (unless the FOB battery is dead).

I found a source on eBay for "new" fobs that can be flashed by the dealer. They put new guts in them I guess but I was able to get my Dealer to program one for my Gen Coupe.
I don't believe Hyundai FOBs are flashed to the vehicle... the vehicle has to learn the FOB's frequencies, as well as the FOB's resonance value (for "Limp-Home" mode by pushing on the start button with the FOB). And, the number of active FOBs the vehicle can hold at one time is two. Please correct me if wrong.
 
#19 ·
My fob has separated two times. I carry the fobs for both cars plus a Surefire Sidekick on a carabiner on my belt. The Sonata fob is on the outside so the other items do not touch the buttons of the Sonata fob.

I don't remember the first time it separated. The second was a few days ago at the checkout point at the grocery store. I wasn't aware until we got to the car. I've ordered a sleeve to put it in and hope that will do the trick.

I agree the design is poor. The price is too high. The inability to use any other fob is very customer unfriendly. One of the few negatives I've found toward Hyundai so far.
 
#20 ·
I got gas, picked up food, come home and then noticed the key was on my ring, but fob was gone. I looked everywhere in the house. I experimented like one writer suggested, and started the car with the alternative fob, brought the alternative fob in the house, and drove off. I went around the block, and was even abel to lock the doors when in my drive way. I think the fob is somewhere in my car, but can not find it. Does anyone have any suggestions on how to assess if the fob is in the car? It is a 2020 Hyundai Tucson. Thank you!