Transponder Keys - Everything you need to know
The evolution of computer technology and electronics is impressive and deserves recognition, and car keys are no different. While the first car was invented in 1885, the original ignition car key that also operated the starter mechanism didn’t show up until 1949, thanks to Chrysler. By 1920, cars had door keys and starter handles to generate current or starter buttons mounted on the floor or dash. Older cars were locked using cylinder locks. By the 1950s, many cars had keys to start the ignition and open the doors, trunk, and glove compartment.
An acceleration in technological advancement stemmed from the ‘80s onwards when we saw the invention of coded resistors, laser-cut keys, and ultra-secure transponder keys in 2004. This guide is a deep dive into all things transponder keys, answering questions like: does my car have a transponder key? What is a transponder key? How do I get a new transponder key? Learn about transponder key replacement and why this RFID technology enhances vehicle security.
What is a Transponder Key?
Each transponder chip car key is programmed to start a specific vehicle. A transponder car key, key fob, or chip key has an RFID (radiofrequency identification) chip installed that sends a low-level signal over a short distance to a remote immobilizer device. For an added layer of security, the immobilizer device prevents the car from starting if it doesn’t recognize the correct unique serial number for the programmed transponder key. Transponder keys are also used in keyless entry systems and gate and garage openers.
Understanding Transponder Keys
How do transponder keys prevent theft?
Key transponders became an innovative way to ramp up security and combat the rise in hot-wiring cars. If a non-transponder key is used or the transponder key isn’t nearby, the car won’t start due to the immobilizer system. Transponder chip keys are also harder to duplicate, so they’re less likely to be stolen and copied.
Check out our article on Transponder Chip Cloning.
Car manufacturers of some of the most popular and top-quality cars use transponder keys, such as:
Transponder Key Vs. Non-Transponder Key
The main difference between a transponder key and a non-transponder key is that the transponder contains an RFID microchip, and others don’t. Key transponder chips need to be programmed to a specific vehicle and immobilizer system to work. Non-transponder keys can’t transmit signals to immobilizer systems because they don’t have the chip.
Programming a chip can be more involved depending on certain factors, like the type of vehicle. Hiring a professional to program your transponder key assures you everything is working properly and that your vehicle has the added layer of security.
Identifying Transponder Keys
You might be wondering: does my car have a transponder key? Car key transponders usually have a chip in the plastic head of the key, so they’re usually larger than a mechanical key. You could also search on Google for a ‘list of cars with transponder keys.
To really be sure, you can call a locksmith or the local dealership for your vehicle make and model. Consulting with a professional locksmith is the best way to verify if you have a key transponder chip. Be sure to have your car make, model, and year ready so the locksmith can give you accurate and timely information.
Replacement Key Service
Locksmith Vs. Dealership
Needing a new replacement key is just another hassle on your to-do list. Where you choose to go is the biggest factor influencing the price of replacing a key with a transponder. While the dealership might have a glossy floor, a locksmith can usually offer you a better price. A locksmith can also typically get the job done quicker, as dealing with keys is what they do best.
Dealerships only work with the makes and models of the vehicles sold on-site, so you might have to travel further to find the right dealership for your car. Professional locksmiths can work on nearly all cars and have the professional equipment needed for transponder key replacement, such as key programmers. If you go to a dealership, you might have to wait for your new transponder key to be ordered from the factory.
Costs and Considerations
Replacing a car key transponder can cost anywhere from $50 to $300, depending on the key and the type of vehicle.
Replacing transponder keys cost more than other keys because they have to be programmed into your car for security. The engine won’t start unless the ignition of your car senses that it’s the right key.
Potential Issues and Maintenance
Transponder keys are long-lasting and reliable, but there are some potential problems that could arise over time:
- Dead battery
- Issues with locking and unlocking
- Issues with the programming or immobilizer system
- A damaged chip in the key due to excess heat, water exposure, or dropping the key
- Too many RF signals around that interfere with the transponder signal
The grooves on a metal key can start to wear away over time. These grooves move little pins within the lock to a certain position that allows the car to start.
If your transponder key is failing, the key symbol might appear on your car dashboard. Your car may not start up as smoothly as before. If when you turn the key in the ignition, it doesn’t go anywhere and feels stuck, the transponder might need replacing.
Tips for Maintaining Transponder Keys
Maintain your transponder car keys by avoiding exposure to water, moisture, and extreme temperatures. Avoid dropping or squashing them, and have them checked and reprogrammed regularly to ensure they’re in working order.
Frequently Asked Questions on Transponder Keys
How Do You Start Your Car Without the Chip Key?
To switch on your vehicle engine, you’ll need a properly programmed chip key. Most modern vehicles won’t start without the chip key. The best option is to visit a professional locksmith, your car manufacturer’s local dealership, or a reliable garage. An authorized locksmith or dealership can read the frequency from your vehicle and create a replacement key with a transponder chip for you.
Can a Transponder Key Be Copied?
It’s extremely difficult to copy a transponder key without a professional locksmith. These keys are designed with security and theft prevention in mind. A locksmith will take a blank transponder key and use special equipment called a key fob programmer to program the right frequency for your vehicle. Our American Key Supply team offers top-of-the-range key fob programmers for locksmiths to create new transponder keys for you as efficiently as possible. We’re a leading distributor of lasting hardware and supplies for locksmiths, including key-cutting machines, key boxes and organizers, and other useful tools.
Can You Program a Transponder Key Yourself?
It’s possible to program a transponder key yourself without the original on hand, but this only works for some cars. Some people prefer hiring a professional to guarantee the key is properly programmed.
Can You Replace a Transponder Key Without the Original?
It’s possible to replace a transponder key even if you don’t have the original. That’s where respected locksmiths come in. Because the process usually involves multiple steps, such as cutting wires to disconnect the transponder key antenna, connecting wires, and using a scanning device, many people feel more comfortable hiring a professional.
What’s the Difference Between a Transponder Key and a Regular Key?
The main difference between a transponder key and a regular key is that the transponder contains an RFID chip that sends radiofrequency signals to an immobilizer system in your car. This is what sets transponder keys apart from any other key.
Can You Hotwire a Car With a Transponder Key?
Even if a thief attempts to hotwire and steal your car or tries to turn the ignition using another tool or key, the car won’t start. Leading and luxury car manufacturers are choosing transponder keys because they amplify using advanced radiofrequency technology.