Everything You Need to Know About Key Fob Replacement
– Nick Borges-Silva for Wilsonville Toyota
Is there anything more annoying than losing or breaking a key? I don’t know. Probably.
The point is:
Key issues are a bummer, and they have the potential to leave you stranded without access to your vehicle. But don’t worry too much because we have you covered.
Many of these tips are, in fact, much easier to utilize than you may believe. For instance, did you know it’s possible to use push-button start even if your smart key’s battery is dead?
But while advanced technologies have afforded us seemingly endless conveniences, they can still act as a double-edged sword when it comes to repair and replacement costs. That’s why we teamed up with our outstanding customer advocate JSP to put this guide together: to ensure you’re ready to deal with any key troubles you may encounter in a simple and efficient fashion.

I Lost My Key Fob
Replacing a missing key fob is relatively simple due to the fact that our parts department typically has every Toyota key replacement already in stock. Unfortunately, a full replacement is the most expensive fix on our list.
Why are replacements so expensive?
Many drivers don’t know that many electronic keys also house a standard physical key (as seen in the photo below). As a result, key fob replacements need their physical keys cut and their electronics programmed in order to match up with their corresponding vehicles. Replacement prices vary depending on whether you’re dealing with a smart key or a more standard key, but they generally fall between $200 and $350.

And here’s where it can get tough:
When you lose one key, your dealership of choice will typically duplicate your remaining key. If, however, you lose both of your keys—vehicles typically come with two—replacements become more expensive (approximately $650). This is because your vehicle’s computer system needs to be updated for the new keys to function properly.
My Key Fob Broke
Here’s where you may be in luck:
If you only broke the standard mechanical key in your key fob, cutting a new key shouldn’t cost much, and you may be able to continue using your existing key fob along with your newly cut mechanical key.
On the other hand, if you happen to damage your key fob’s electronics due to water damage or other severe means, you’ll likely be looking at a complete key fob replacement.
And while it’s not always cheap, you may be able to save some money if you only break your key fob’s case and don’t damage the electronics. Prices vary significantly depending on where you buy replacement parts, so feel free to call us at (503) 582-9040 to find out more.
My Key Fob’s Battery Died
To replace the battery in your key fob, start by prying open the key fob case. This can be done by using the mechanical key hidden in the fob’s casing. You should then be able to find a slot specifically intended for opening the fob’s case.

Inside the key fob is a small circuit board that can be turned over to reveal the battery. CR2032 batteries are commonly used in key fobs and shouldn’t be hard to find online or in stores when you need a replacement. These batteries also won’t break the bank as they tend to go for no more than a few bucks.

How Can I Start My Vehicle If My Key Fob’s Battery Is Dead?
This is a common concern when drivers move to a smart key system.
While many smart-key-equipped vehicles can be accessed by using your mechanical key with the driver’s door lock, you may be out of luck if your vehicle is equipped with push-button start. What many drivers don’t know is that you should still be able to start your vehicle by holding your key fob against the start button even if your key’s battery is too weak to unlock the doors. New Toyota vehicles include detailed instructions on this topic, which are listed on a paper card inside the glove compartment.

109 comment(s) so far on Everything You Need to Know About Key Fob Replacement
Lost Smart Key Fob for my 2018 Toyota Rav4. What is the cost to replace it [Without the Key]?
I lost a remote and want to buy another one.
I have seen remotes without the key for much less. Is this an option? will they still start the car?
I have a Toyota HHighlander 2010.
Key Fob part number 89904-48110
This is a perfect question for our Parts team, so please give us a call. The remote would still need to be programmed for the vehicle. Just keep that in mind when you’re comparing costs.
Bought a key fob replacement for a 2007 Chrysler 300 c. figured i would just get the key cut and put the insides of the broken key into the new fob. why is it that people cant cut the keys for the key fobs if i provide the key?
We checked into this and, since we’re not a service center for Chrysler vehicles, you’d have to check with a local service center. It sounds like you could do it, but we’d imagine most service centers wouldn’t want to be liable for the potential bad results from this kind of hack. Excellent question though!
Do the toyota prado 2013 only come with two remotes and one mechanical key?
As i found one one remote has no mechanical key?
Thanks
We’d encourage you to check with a local service center on this one as Toyota specs and accessories vary widely by region.
I dropped my key fob for a 2008 Prius. I took it to my dealer and now they cannot connect it to the computer in the car. I was able to drive to the dealer to drop it off with the little key this morning and the computer was fine and now my car is worse than it was and the dealer has no answer.
The dealer is the best resource on that. The key fob may not be repairable.
Daer sir, My Toyota Passo QNC10 K3-Ve Smart Key Lost.
Could you teach me how to duplicate used smart key?
Location Malaysia
Thank you for your inquiry. Special equipment is required to replace a smart key as it has a computer chip that must be matched to the car. We recommend that you work with a Toyota Service Center for replacement.
Hi
I still have the key but some how the casing fell off and not able to find it. Any suggestions?
Very hard to buy just the outer case. Check with you local dealer. As noted in our article, the fob itself isn’t always the expensive part. It’s the programming. If you can’t find an unused key out in the market – like at a wrecking yard – you may find that buying a new one without programming is your best bet. You’ll need someone qualified to swap the parts from one to the other but it sounds like half the work is already done 🙂
You can buy key fob super cheap on Amazon that’s what I did with my rig.
What do I need to bring to the dealership to get a new key? Registration? Title? ID?
The best thing to bring is the small stamped-metal key tag that came with one of the primary keys when the car was purchased new. Barring that, depending on your relationship with the dealer, you may need to provide some ownership documentation. A current registration and ID is typically satisfactory.
Thanx for the information, me I would like to order for a smart push to start fob for Toyota ractis 2008. How much is involved and how do i program it.
Programming is typically done at the dealer, regardless of where you order the fob from. Unfortunately we can’t send the correct part to you in Uganda so you’ll need to contact a dealer there. Thank you for your question.
Thanks! I always remember your tips when i hire locksmith for my Key Fob replacement.
It’s good to know you can actually replace your key fob. It’s also nice to know that cutting a new key shouldn’t be too hard of the mechanical key in the key fob was broken. I’m kind of interested to learn if the entire fob should be taken apart to fix the key or if it only depends on how badly the key was broken.
To be clear, we don’t advocate taking your fob apart. We recommend you save that work for a qualified technician. But replacement is fairly simple.
I put a remote CompuStar remote starter in my 2014 Camry. My question is will this remote starter replace my transponder key or do I need to have both at all times?
Sorry about our delay in responding over the holidays. You will need both unless it’s the Toyota-brand remote start system.
Wow! Your article on lost key and fob was the most helpful article on it that I have been able to find on the internet. Thank you from Texas!!!
P.S. My key broke in two…and then I lost the mechanical part and am left with a broken fob case , but the fob still works.
Thank you Texas Craig! We enjoy answering questions from all over the world. Glad you found this helpful.
FOB quit working on my 2003 Camry. Bought a new pair and both programmed easily but lose signal after sevetal hours. Seller says “just return them” but I’m just looking for a solution.
It does sound like something is wrong with the fobs to cause lost signal. Could be any number of manufacturing defects causing a short. If you’ve ruled out external interference – on other words, the same thing happens regardless of location – and bad batteries, you may just have some bad units.
Thanks for sharing this blog. Batteries are commonly used in key fobs and shouldn’t be hard to find online or in stores when you need a replacement.
I lost a key and want to buy other one is that available for toyota camry le 2000
Thank you for these tips on dealing with a key that isn’t working. My husband is locked out of his car and we need to get into it. I’ll have to do some research and find the best services to help us.
That is very attention-grabbing, You’re an overly professional blogger.
I’ve joined your feed and stay up for in search of more of your fantastic post.
Also, I have shared your site in my social networks
Thank you! We have a great research and writing team here. We appreciate your interest.
Hello, I’ve purchased a 2004 Avalon but only got mechanical key (no remote fob) . How do I determine if I need a three or four button remote? (with or without trunk button?) Thank you.
Sorry about the delay in getting back to you Kent. (Love the address, I’m a rider…and an Avalon driver…too.) In 2004 models that came with wireless remote, it was 4 buttons: Lock, Unlock, Trunk on the front and panic on the back.
My 2017 Prius Prime and I live in California. Two days ago, while at the movies. I lost my key fob; yesterday, I bought a new one from the dealer for $450. Three hours later, the theater called to report that they found the fob. This morning, I went to the dealer and asked them to take back the fob, offering to pay a restocking fee. I was told that they “couldn’t” take it back because it can’t be reprogrammed. Truth or fiction?
That’s an excellent question and will probably make it into a future edit of this page. Key fobs can often be reprogrammed. But in your case, it’s a Smartkey, not just a fob. Unfortunately, those are not designed for reprogramming.
hi
pls can help to know how programming toyota 79 model. GRJ79L-TJMNKV . 2011
i need instruction of programming remote
thanks
regards
Thanks for the message. Instructions vary widely around the world so we can’t provide those here. Please consult your local Toyota technician.
Just bought a 2009 toyota tacoma didn’t come with a key fob so I ordered one. That is all I got the key fob but I need a circuit board and a battery which didn’t come with it. How can I get a circuit board for it. Battery should not be hard to get.
Great question, Robb! Toyota sells key fobs with all of the necessary parts together, no additional parts should be necessary. Depending on where you purchased your key fob, your local Toyota parts department may be able to help you out. Please feel free to reach out with any further questions!
I was looking for Fob and got your article. I must say you share very useful tips. It will help me
I recently purchased a preowned 2013 Toyota RAV4
And although I have a key that will unlock all doors remotely, I would like to be able to open the rear door remotely as well. I am eighty and find it difficult to open the rear door manually. Is it possible to have a key that will do this? I had this function on a previously owned car.
Thank you.
Hi Diane, thanks for leaving us a comment. It sounds like your 2013 RAV4 has a manual rear liftgate instead of a power liftgate. Unfortunately, there is no way to program your key fob to open this door. Please reach out to us if you have any further questions or concerns!
I bought a mazda3 without the fob what do I need to do or get. Thank you
Thank you for reaching out, Robert! Where are you located? It is likely best to contact your local Mazda dealer, as their service department will specialize in Mazda key fobs.
I bought a used 2012 Toyota 4 runner limited and they only has one key fob and it’s a push button start. How much and where do I get a second one in case of an emergency?
Thanks
Thanks for the comment, Michelle! Your local Toyota dealer can help you get set up with a new key fob. These usually run for around $350 for the new key fob, shank and programming. Let us know if you have any other questions!
How can I tell if my 2009 Toyota Corolla (Base Model) originally came with a FOB remote? I am the third owner and the guy who sold it to me only provided one key.
Thanks for the comment, Ray. Your local Toyota dealer should be able to help you out here. Reach out to your local dealer and they should be able to look up the build of your vehicle for you!
I seem to be only getting 2 or 3 months service out of replacement 2032 batteries in 2005 Avalon Limited keyless vehicle fob. What is the likely reason for this short service life? 6 new batteries a year won’t break the bank but I would like to correct the issue. Thanks
Thank you for reaching out, John. That is an interesting issue. From our experience, these batteries should last around 2 years. We’d love to help you try and figure this issue out. If you’d like to talk to our parts expert Kevin, please feel free to call (503) 582-9040.
I already have unprogrammed find and uncut replacement keys, how do I get the keys cut and programmed? And what will it cost me?
Hi Coleen! Thanks for the comment. This depends on the specific model of your vehicle. It would probably be best to reach out to your local dealer and set up an appointment to get the keys cut and programmed – most dealers have the ability to perform this service. Please feel free to reach out to us with any further questions!
Do you send to the UK ?
Hi Gary, unfortunately we do not ship to the UK. However, your local dealer should be able to help you out!
Can I get my two Toyota’s so only 1 key will operate both vehichle?
Hi Roger, thanks for the comment. Unfortunately, there is no way to dual program a key fob to operate two vehicles.
I just replaced my case for my 2004 Toyota Prius keyless remote key fob. Replaced the motherboard and old battery back in then closed up the case on the key fob.
Do I now have to reprogram my key fob having physically torn it apart and put it back together?
Hi Fred. Thanks for reaching out. You should not have to reprogram the key fob after this process. However, if you’re having any trouble with your key fob, your local Toyota parts department should be able to help out.
HI, I lost my key for my 2009 Toyota Avensis, how can I get a new one?
Hi Rayan, thanks for commenting! Your local Toyota dealer’s parts department should be able to help you out. Most parts departments allow you to buy a new key fob directly from them.
If I have a 7 button key fob but dont like the engine start button, can I order a 6 button key fob and it still work?
Hi Amanda, thanks for the comment. What model of vehicle do you have?
Do I have to use the same key fob from the same generation of cars or can I use a new key fob say for a 2009 Tacoma on a 94’ Celica?
Hi Ray. Unfortunately your newer (Tacoma) key fob would not program up to your Celica. Let us know if you have any further questions!
Hello, you folks have a superb site! I have a 2010 RAV4, and the original 2 fob keys, and one mechanical key. My question is this: Id I happen to loose both fob keys, and in a pinch, can I safely use the mechanical key to open the Rav, insert into the ignition and drive the car home (without harming the electronics? (Ie, can I safely use the mechanical key to drive th car home and not screw things up electronically). I read many of your notes above, superb stuff for a mechanical no-load like myself.
Hi Mel. If your vehicle has the immobilizer in it and your mechanical key is programmed to the vehicle, your vehicle should start up and be good to drive home. However, if you have lost both of the main keys and are left with only the valet key, you are not able to program new keys off of the valet key, making the service department fee much higher than if you would have made the key while you still had one master available. Hope that helps – let us know if you have any further questions.
Amazing blog post and nicely explained about key fob replacement thanks for sharing. This is really helpful for everyone.
I have a new 2019 Toyota Avalon limited on my 2nd fob there is a small metal flap….it actually fits in the slot by the gearshift…what is its purpose?
Great question, Tammy. The metal flap on your key fob should have a 5-digit code on it. These digits are necessary if you lose all of your keys and need an additional key made.
I lost my Fob, but I still have the key part. How can I start my car with only the key?
This varies from vehicle to vehicle. What kind of car are you driving?
I replaced the battery for my key fob (I’ve done it before with no problem) and for whatever reason is doesn’t matter that I put the key next to the push to start it keeps saying the key isn’t in the car! Mine is a 2011 Prius.
2018 Toyota Prius 4 (Extra keys)
Hi,
I was wondering if I could program a third FOB key to my Toyota Prius? I wanted to hide a third key inside my car in a faraday pouch. Then hide the emergency door key under my bumper. That way I could gain entrance into the door using my emergency key. And Start my car with my FOB key. Which is hidden in protected pouch in my car. Is that possible?
Great question, Chris. Your vehicle does have a limit on how many keys can be programmed to it at once, but that is usually around 4-5 keys. If you bring your Prius in to a service department, a technician can hook the computer up to your car to see if there are spots left available. Let us know if that answers your question!
First of all tha k you for this Blog and the time you guys take to maintain it.
Same situation as a couple people on here. My casing came off and its lost no clue where. I still have the manual stick key that slides into casing though.
Main concern if someone else finds the remote casing is it useless to them without the other part that I have. I am freaking out about someone stealing it.
Second I see casings on internet but will it work if I just slide my manual key inside? Or do i need to program it or have a professional person program it?
Thank you for your time.
Thank you for leaving us a comment! The lost key should still be able to start your car even without the metal slide-in key. You can however have a service department wipe the key contents and reprogram new keys, rendering the old key useless. Let us know if you have any further questions!
Hello, I unfortunately dropped my keys the other day and didn’t notice the fob came apart and is now half of it is currently missing (I’ve looked everywhere). The standard mechanical key is still attached to my key chain but I lost the other electronic half. My question is: can someone break into my car with only half the fob? There currently is a lot of theft in my neighbourhood and am worried they can now easily take my car. Thanks for your help.
Thank you for leaving us a comment! The lost key should still be able to start your car even without the metal slide-in key. You can however have a service department wipe the key contents and reprogram new keys, rendering the old key useless. Let us know if you have any further questions!
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to listen news on TV, so I just use web for that purpose,
and obtain the most up-to-date information.
Amazing post with a lot of information. many many thanks for sharing with us. I hope you will post on this topic in your next article.
I like how you said that cutting a new key shouldn’t cost much because my sister accidentally broke my car key. I managed to glue it back together but I’m not sure how long it’s going to hold. It feels like it’s going to break at any minute. A new key is definitely a necessity.
This article said nothing about replacing a key fob…. No manufacturer part number, ICC#, FCC ID, electronics id numbers … do all these have to match? What if all of them match and the seller of the key states that it won’t work for an older car (1-year older than the range).
Thank you for your tip that water damage to a key fob could mean you need a whole new key. About a month ago, my sister bought a nice, new car. She loses things very easily, so I wonder if she should look into getting a spare or two made! I will have to look for locksmiths that could help her!
Checked my prius firmware and it possible add new used key fob or use new key to connect to my car, need only RFID programmer. or possible download firmware NVRAM ROM from old key for and make a identical copy in new key. That’s works!!
A well-detailed article thanks for sharing this one, nice job.
A short and informative blog post I found here! We should avoid losing our key fob.
A short and informative blog post I found here! We should avoid losing our key fob.
Such an informative post that is covering all the aspects of the key fob replacement.
Excellent post to cover the topic of keys replacement. I would definitely recommend this post to others.
Excellent post for keys replacement.
Do you need a specific type of battery for all remotes or does it vary? I need to get a Duracell battery set for our garage door opener. It keeps dying and I have to manually open the garage at that point.
I have a Prius key fob from my 2018 Prius that was totaled. I want to have this re-coded to use with my new 2017 Prius. How do I do this?
Cost of a 2009 camry fob that is push button engine
Thanks for pointing out that a water-damaged key fob would really require a replacement. With that in mind, I should look for a professional as soon as possible to get mine replaced. It’s because I dropped the original key fob of my car into a puddle of water when I was rushing to get inside of the house last night.
You need to talk about how to replace the little spring behind the push button. It falls out with the button and not intuitive how to reinstall
thanks for the blog.I dont know about the fob replacement before thanks for sharing this information
Awesome post! Thanks for sharing the knowledge and keep up the good work.
This is a good article. i got more information about key fob replacement. i m sharing with you about gaming cpu under 10,000.
Glad to hear you found this information to be useful!
Does my 2005 car computer or key faub are not working sometimes the car will start but the key light is on wile driving
This light illuminates when the vehicle control modules see the ignition turned without a key within range; this likely means that there is a weak key battery and you will need to replace it soon. We hope this helps!
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We’re glad you found it useful! Thanks for reading.
I broke my mother’s key fob while trying to unlock the door of a 2014 Toyota Camry. The chip was lost. I tried to get another key fob but I was given a key with the transponder in it and it’s irritating since I can’t unlock or lock all the doors at once. Is there a way I can either place a whole key in a fob and it work like that, or do I have to take the cut key and buy another key fob and have it programmed?
Where is the transponder chip in a smart key fob to a 2017 push start Camry?
Great question! The chip inside should be in the head of the key.
What a helpful and informative blog! Key fob issues can be really frustrating, and this article does a great job breaking down the replacement process in a simple, easy-to-understand way. I especially appreciate how it covers both cost and convenience—very practical insights for car owners. Thanks for sharing such valuable information!
I found this article while researching the topic, and I must say it’s one of the best resources I’ve read so far. Very helpful!