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If you have a basic mechanical key, you should be able to get a replacement at any hardware store for relatively inexpensive. This key will need to be programmed by a dealership or locksmith.

Smart keys are more complex and require a visit to the dealer to connect them to your car. These kinds of keys can be costly, but some car insurance companies will cover the cost.

Mechanical Keys

You can still purchase mechanical keys for cars which you insert into an ignition lock cylinder to start your vehicle. If your car is equipped with one of these, replacing the fob and keys is relatively cheap (if they are lost or stolen).

A locksmith can cut an entry level key for you at a lower price than you would buy from the dealership. You can also have someone close to you who is proficient in programming transponder keys that are made for the aftermarket (which are cheaper than factory keys) cut you a spare key and then program them. It is essential to have a spare because modern cars won't begin if a key without the correct chip is used.

Transponder keys are like mechanical keys but contain an electronic chip inside the base. The chip communicates with the computer system of your vehicle. Your car keys lost replacement will accept the code that is on the chip, but will not start if you try to use another code.

If the spare key you have has a chip, you'll need to bring it to a dealer to get it programmed. The dealership will require an equipment that is specifically designed for cutting and programming the key. These machines are only available at specific dealerships, and it's unlikely that a locksmith will have the equipment required to create an engraved key using a laser transponder.

It's costly to replace keys with remotes, especially if you require a spare. Try reprogramming the fob by yourself if you're missing the shank of the key and have a working replacement fob, but it could be time-consuming and difficult. If you've lost your entire fob and key, however you should seek out a dealer as your best bet.

Other types of keys for cars require more specific skills to replace. This includes flip keys and smart key. These are more complex and typically need to be replaced at the dealership. Certain key fobs come with an electronic key that folds into the enclosure and opens a door or uses proximity sensors to open and start your vehicle.

Transponder Keys

Transponder keys will likely be used in cars built within the past 10 years. The keys have a microchip and an electronic receiver that is programmed to communicate with start your vehicle.

Transponder keys are an excellent way to stop theft because they require two parts in order for the car to start that is the transmitter (transponder) in the key and the receiver that is connected to your immobilizer system. Without both the key and the immobilizer device in place, the car won't start and it will be impossible to connect hotwire.

The key chips come with a unique serial number for your vehicle. The serial number of the key is transmitted to the immobilizer inside the car and verified to be in line. If it does, the engine will start. The only thing that could be a hindrance to this security feature is a special device that is able to detect the chip and match it to another vehicle.

When you have a transponder key replacement you'll need to go to a locksmith that has the necessary equipment to reprogram the keys to your car. Some car dealerships provide this service too, but they tend to be more expensive than a private locksmith because of their overhead.

Getting a new car key with a chip inside it is a complex process. To program your car key cover replacement, the key must be programmed on a specific machine. It requires specialized software and the correct key cutter to do it properly.

Certain of the more basic chip keys can be cloned at the majority of auto parts stores, but you need to know the serial number of the original key to ensure that the correct information is programmed into the new key. Many people make a mistake by going to their dealer in search of the clone of a chip-key and end up paying high costs.

Laser-Cut Keys

Laser-cut keys, referred to as sidewinder keys because of their distinctive winding cuts on the key shank they add a layer of security to your vehicle. Keys like these are a great protection against auto theft since they require specialized machinery to duplicate.

Like transponder keys, they have embedded chips that stop unauthorized key copies from starting your vehicle. They also usually contain a unique code the key, which needs to be programmed for your specific car in order to allow it to be opened and started. This additional level of security will protect your investment and stop thieves from attempting to steal your car for parts or to resell it.

Laser-cut keys differ slightly from mechanically-cut keys in terms of design. They have fewer grooves cut on the key. The key shaft is also more substantial, which is another indication that this isn't an ordinary car key. Locksmiths usually employ a milling machine to cut keys. It's akin to a drill, and is designed to remove metal with precise angles.

They're among the most secure keys you can buy for your vehicle, since they're very hard to replicate and can only be cut by a locksmith who is a certified dealer. Unlike traditional keys, they're made using a small piece of steel that is shaped into a code and then cut with a laser at the factory. This kind of key can endure a lot of wear and tear and is one of the best choices for protecting your vehicle.

The key can be folded up into the fob, or it can be removed by pressing a button. Keys like this are typically used in German cars and offer an additional layer of security against car thieves. The cylinder is robust and difficult to break into, which makes it difficult for a thief pick or pick-lock the vehicle.

Smart Keys

Smart keys communicate with the vehicle by using radio-frequency identification (RFID) instead of the conventional single piece of carved metal. They are equipped with a chip that has an individual code, which is encoded on each key. When you open your car's doors or open the trunk, the key sends a signal to the vehicle's onboard computer. The computer then signals the appropriate frequency, allowing you to access your car and start it.

The chip of the smart key is equipped with several security features to guard it from theft. First the key emits a low-frequency signal that isn't detected by any other receiver, not even your car key replacements. If the computer onboard detects this signal, it will send an additional signal that is unique and only your vehicle can comprehend. This prevents a tech savvy criminal from using an electronic pulse generator to "fool the system" and make the key work on other vehicles.

Some smart keys have special features, such as the ability to store preferences for drivers, opening windows remotely or the sunroof from afar and many other. These can be done by activating the key's proximity sensor, pressing a button on the key itself or, in some instances, by twisting a tiny metal piece inside the key.

Most of these key fobs feature buttons that open the doors for themselves, but some have another method of opening them with a slot or by placing the dead key close to an area on the dashboard, where it houses an inductive coil that can transfer energy. Some key fobs have a mechanical (fully emergency car key replacement) key blade in the key.

Replacing a smart lock typically requires a visit to the dealership, where they will either have the replacement in stock or order it for you. They'll also need to program the new key to recognize your car. But, you can go to a locksmith shop to have your new key fob programmed and replaced. Locksmiths may charge more than the dealer, but they'll be able to finish the job more quickly and less expensively.