The Evolution Of Car Keys

The modern day car key has evolved a great deal in recent years, however the majority of car drivers are completely unaware of the technology incorporated into the key that operates their vehicle. This is understandable as in most cases the key looks and operates the way all vehicle keys have in the past, simply insert the key into the ignition lock and turn to start the engine. Although the basic principle of the mechanical key remains the same, it’s there where the similarity ends.

An electronic engine immobilizer, commonly known as a transponder chip, is located in the plastic head of your key. When you insert the key into the ignition lock, the transponder chip relays a code to a receiver, usually located around the steering lock. The vehicles ECU (engine management unit) will then allow the engine to start.

Unfortunately for the car driver this system is so efficient that most people are blissfully unaware of the technology involved. This is proven because, as a key supplier, processing orders for keys cut to code on the internet, we continually receive enquiries and potential orders for vehicle keys from people under the assumption that we can send them a replacement car key in the post that will start their car.

Unfortunately mail order car keys, in most cases, are not possible. In order for the key to start your car it must either be cloned from an existing key or physically programmed to the car using an OBD cable plugged directly into the vehicles diagnostic port. In either case special equipment is required to complete the process enabling the key to start the engine.

If your vehicle was produced after 1996 it is almost certain that your existing key has a transponder chip, there are variations of the systems used by different manufacturers. For example fixed code transponders where the code remains the same or rolling code transponders where the code changes each time you remove the key from the ignition. Remember these systems are passive, you as the car driver do nothing to activate or de-activate the process. Simple and effective in its design, but potentially extremely costly if you don't keep a spare key.

People usually avoid buying a spare key because they are unaware of the financial implications of having their only key replaced. If your only key is lost or broken then the cost of replacing it can run up to £400, and added to that, there is the inconvenience of potentially losing the use of your vehicle for a couple of days whilst the problem is resolved by a garage. Most transponder keys can be cloned or programmed by locksmiths for as little as £30.00, a small price to pay considering the alternative.

So why run the risk? Always keep a spare!

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