Lexus IS300 Lost Car Key Replacement – All the Information You Need to Get a New Lexus IS300 Key. Tips, Costs, Your Options, and More.
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In this article:
Lexus IS300 was introduced in 2001. This model has two versions and three types of keys.
Remote key fobs: 2016 to 2023.
Transponder chip key: 2001 to 2005.
- Please keep in mind that while some keys or key fobs may look the same, they have different capabilities/frequencies/keyways. Therefore, having the right key or key fob is essential.
- Already have your key? Need information to guide you through programming your Lexus IS300 key fob or transponder key?
Quick access or go to FAQ
Click on the type of key you had or your year model below to get the most accurate information:
Lexus IS300 w/Prox:
2021, 2022, 2023: (HYQ14FLB)
2016, 2017, 2018, 2019, 2020: (HYQ14FBA)
Lexus IS300 w/o Prox:
2001, 2002, 2003, 2004, 2005: (TOY48BT4)
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Q: I lost my Lexus IS300 car keys. I don’t have a spare, so need a replacement. How and where can I get a replacement key?
Generally speaking, you have three options:
First, call an automotive locksmith near you that offers a mobile service for Lexus IS300 cars. We can connect you with a locksmith near you.
Second, tow the car to a Lexus dealership.
Third, order a key online and have the dealer or locksmith cut and program it for you (if necessary).
A word of caution: The type of key you need depends on the year and model of your Lexus IS300. Therefore, the options for getting a new key made and programmed depend on whether you need a remote key fob, a transponder chip key, or a regular metal key.
Let’s review each option.
An automotive locksmith can make most car keys on-site, including keys for the newest Lexus IS300 models. Most automotive locksmiths offer a mobile service because most Lexus IS300 keys made after 1998 need to be programmed or coded to the car.
This Coding process can’t be done remotely and involves connecting the coding machine physically to the car’s OBD (like in the picture below) and therefore the car must be present.
Saying that, you will have to make sure that the locksmith carries the necessary equipment to cut and program a replacement key, including the right coding machine (e.g. LAUNCH X431 PRO5 or LAUNCH X431 PRO5) and the right key blank (remote key fob or chip key).
The best way to do that is to provide the locksmith with the year make and model or VIN number when you call.
Because Lexus IS300 is a very common car, chances are they will have the right key blank for your model.
Usually, a locksmith would be your fastest, most convenient and cheapest option overall to get a replacement key.
Order the key online:
Today you can get most Lexus IS300 keys online (with the exception of the most recent model) and relatively fast within 24 Hr. Getting a replacement key online has its pros and cons.
This option is mostly relevant for people who need a duplicate or spare key and can drive the car.
For people who have lost their Lexus IS300 keys and don’t have a spare, it may not be as relevant.
The reason is because when you order a key online, it is what we call a “blank key”.
A blank key is a key that needs to be cut, and, as mentioned above for most Lexus IS300 keys made after 1998, programmed or coded with a special machine.
Therefore, ordering a replacement key online is only the first step. You will still have to contact and pay either the dealer or locksmith to have the key cut and programmed.
Moreover, remember that although many car keys may look alike, they have different security features and chip values. This is especially true for remote key fobs sold online and so it’s very easy for most people to get confused and order the wrong key.
The third option- Lexus dealership:
The last option to get a Lexus IS300 key replacement without the original is to look for a Lexus dealership near you.
The plus side is that they will have the right key blank in stock and should be able to program the key for you as well, even for the latest model as they carry the newest coding machines for Lexus models.
The downside is that the dealership usually charges more for a replacement key than a locksmith would.
Another major downside of getting a replacement key at the dealership is that if you had a transponder chip key or key fob (or in other words if your car was made after 1998 as explained above) you will have to tow the car there, which will make the process even more expansive.
If your Lexus IS300 had a chip key or key fob, and you need a replacement ASAP, a locksmith would be your best bet.
The only exception for that is if you just bought a brand-new car, and then a Lexus IS300 dealer would be the best way.
In case you only need a spare key, you can try and get it online, but make sure you know exactly which key blank or part number you need.
Not ready to call for service just yet? Click here for some GREAT ideas on how to find lost car keys.
Q: Lexus IS300 key replacement near me – How to find a locksmith or dealer and what should you tell them?
First, make sure you have the exact year, make, and model, e.g., 2022 Lexus IS300 w/Prox.
In addition, write down the VIN (Vehicle Identification Number) of the car located on the left side of the dashboard near the mirror. The VIN helps the locksmith or dealer verify the year, make, and model of the car and determine which key you had.
Also, keep in mind that many locksmiths offer mobile service and travel up to 30 miles radius from where their store is located. Therefore, depends on your location, it might be a good idea to expand your search and call for a few additional quotes, even if on the map, these locksmiths seems to be far from you.
Their distance as you see on the map, is their business address, not their physical and current location. All you have to make sure, is that they carry the right equipment to cut and program your Lexus IS300 key.
You can also try and call a few Lexus dealers near your location, but remember that you will need to tow the car there.
Finally, make sure you can show ownership of the car by having the necessary documents – title, ID, insurance card, etc.
Q: Lexus IS300 key replacement cost – How much does it cost to replace a Lexus IS300 key without the original? What is the average price?
In short, replacing a Lexus IS300 key can cost between $190 to $430. The cost depends on a number of factors:
- The type of key you need
- The car’s year of manufacture
- Time of day & your location
- Where you get a key replacement (dealer, automotive locksmith, online, etc.)
- Availability of code to cut a new key
- Original ignition or not
The type of key you had and the year the car was manufactured are the most important factors for identifying if you need a chip, intelligent fob, “push to start”, remote, regular “non-transponder” key. The newer the car is, the better the security features the key has. On later models, you can therefore expect to pay more than $250 for a replacement key.
the price depends on where you get a key replacement. Did your replacement key come from the dealer, or an automotive locksmith? Or did you get it online? Click here to get a more detailed explanation of how to get a replacement key.
The dealer usually charges about 10% to 15% less for the replacement key than a locksmith would charge. However, you will likely have to tow the car there to program the new key or remote. Therefore, the total price is usually higher.
consider that if you have a locksmith come out and make you a new key outside regular business hours, the price may increase.
If you have previously had your ignition cylinder replaced, which is quite common in older cars, this probably means that the code for the key may not be useful. In such cases, the key will have to be cut manually by a locksmith, or you will have to change the ignition again, and here the dealer can’t help.
For a more detailed explanation and GREAT TIPS on how to save money, please visit our blog post: Car keys replacement costs
Tips for Lexus IS300 key fob replacement – What to ask and verify before and after you get a new key fob:
Very often when people get a replacement key fob, there are certain things they forget to check and ask the dealer or locksmith.
We gathered here the most relevant information and tips to make sure you won’t face a problem down the road.
Make sure to get the key code of your Lexus IS300 key fob – Every key fob, has a unique code which locksmiths and dealers use to know the exact cuts to match your ignition, door and trunk cylinders.
Obviously, this code is different from one car to another. This key code costs money, and before the locksmith or dealer cut you a new key fob, they must pay to get the code from the Lexus database, which may cost them up to $100. Make sure you write down this key code and keep it in a safe place. In case you lose your Lexus IS300 key fob again in the future, it will cost you less to get a replacement, and the process will be faster.
Verify they cut you the emergency key, and that it works on the doors cylinders and trunk – Every key fob comes with an emergency key attached to it. The emergency key can be used to access the car in case the battery is dead.
Sometimes, when locksmiths or dealers program a new replacement key fob, they forget to cut the emergency key as well.
Make sure they cut you the emergency key and that it works for each door and the trunk to avoid a future lockout situation. It should work smoothly, just like your house key. Don’t be lazy, check it on site.
know which battery your Lexus IS300 key fob has – These key fobs, like all key fobs, are battery operated. Make sure you know the type of battery you need and keep a spare one. (Lexus IS300 key fobs usually use CR-2032 battery).
Q: Can I get a Lexus IS300 key replacement by its VIN?
A: That depends on the year of manufacture of your car and the type of key you had.
The VIN gives dealers or automotive locksmiths the option of accessing the key code on file – i.e., to cut you a replacement key by code which makes the process fast and easy. There are however two things to consider:
- If your vehicle is older than 10 years, Lexus dealers will no longer have its key code record, so an automotive locksmith will be your only option to get a replacement key.
- For vehicles equipped with a transponder system and/or a remote/intelligent key/fob key, the codes should be available. However, as coding is required, you will have to either tow the car to the dealer, or have an automotive locksmith come and code the key on site.
Q: Lexus IS300 key programming – which keys can you program yourself? Which keys require a programming tool? & more
A: Lexus has different types of keys. Some require programming, and some don’t. All transponder chip keys and/or smart key fobs need to be programmed. This process requires a special programming machine that only an automotive locksmith or the dealer has. There is no need to program non-transponder metal keys.
To make things simple, we divided all Lexus keys into two categories:
- No programming needed (Non-transponder keys).
- Keys that need to be programmed (Transponder or remote keys). These keys required the expertise of an automotive locksmith or the dealer.
No programming needed:
Lexus non-transponder keys are metal keys that have no chip in them, so no programming is needed.
Lexus IS300 has none of this key type – all Lexus IS300 keys have a chip and need to be programmed.
For Lexus IS300 keys that need to be programmed, you will need an automotive locksmith or the dealer:
These keys, also known as remote smart keys, intelligent keys or key fobs, and transponder keys, have a security chip. Programming is needed. Also, a special machine is needed to program them. An automotive locksmith or dealer should do it for you. This process must be followed for most models made after 1998.
HYQ14FLB, HYQ14FBA, TOY48BT4.
Keyless entry information for the Lexus IS300:
For year models 2016 to 2023, there is a built-in keyless entry in the remote key fobs.
Lexus IS300 key fob battery – important information: How to replace, size, cost, and more.
Lexus IS300 has different kinds of keys. If your model uses a key fob, here is some important information you should know about the battery.
Watch a short video here: how to replace Lexus key fob battery, type of battery and more:
Things to remember when your Lexus IS300 key fob battery is dead:
First, even if the key fob’s battery is dead, you still can unlock and start your IS300. You can use the emergency key provided with the key fob to unlock the doors as shown below:
How to start Lexus IS300 with a dead key fob?
You can start your Lexus IS300 by pushing the “Start” button with your key fob. The car’s computer recognizes the chip inside the key fob and authorizes the process.
This way, you will be able to start your vehicle EVEN if the key fob battery is dead.
Lexus IS300 key fob battery information:
Lexus IS300 key fobs are battery operated. Every two years or so, or when the battery is low, you may need to change the key fob battery. Here is all the information you need.
The type of battery you need is a CR-2032. The average price for these batteries is about $5.
You can order CR-2032 online here.
Also, you can find it at Home Depot, Walmart, AutoZone, etc.
Here is some general information about the Lexus IS300 key fob battery:
Type of battery: CR-2032 lithium
Size: Diameter – 20 mm, height – 3.2 mm
Finally, remember that your battery life depends on several factors such as usage, weather conditions, etc. To better protect your Lexus IS300 key fob and extend its battery life, it may be a good idea to have a key fob cover or a case. You can order a key fob cover here.
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