What is a car key card and how does it work?

In this article, we continue to tell you about different types of car keys. In previous articles, we already talked about what a car key with a transponder is, and detailed information about smart car keys.

Today we will talk about perhaps the rarest type of keys – car key card.

A car key card is a modern replacement for the traditional car key. It is a thin electronic device, similar in size to a bank card, used to control access to a vehicle and start its engine. The key card’s primary purpose is to simplify the driver’s interaction with the car while ensuring safety and convenience.

How does a car key card work?

A key card operates using radio-frequency identification (RFID) or other wireless technologies. The card contains a chip that communicates with the vehicle’s system. When the driver approaches the car, the system “recognises” the card if it is within the signal range, typically around 1–2 metres.
Key cards enable several functions, including:

1. Unlocking the vehicle: The doors automatically unlock when the driver with the card comes close to the car.
   Starting the engine: Instead of turning a key, the driver presses a start button, provided the card is inside the vehicle.
2. Locking the car: When moving away from the vehicle, the doors lock automatically or by pressing a button on the door handle.
3. Some key cards are equipped with sensors or physical buttons to activate additional features, such as opening the boot or turning on the car’s lights.

Which car brands use key cards?

Key cards have gained popularity due to their innovative and user-friendly nature. This technology is employed by various car brands, including:

• Renault: One of the first brands to introduce key cards, with models like the Renault Laguna and Renault Clio featuring this technology.
• Lexus: Often includes key cards with advanced functionalities in their premium vehicles.
• BMW and Mercedes-Benz: Offer key cards with enhanced features, such as remote vehicle control via smartphone apps.
• Tesla: Provides key cards as an alternative to mobile apps and standard key fobs in some models.

Advantages and disadvantages of a car key card

Advantages of car key card:

1. Ease of use: Drivers do not need to search for keys in their pockets or bags — the card is always “on hand.”
2. Enhanced security: Modern key cards are difficult to replicate due to advanced signal encryption.
3. Reduced wear and tear: Unlike mechanical keys, key cards are not subject to physical wear.
4. Additional functionalities: Key cards can manage boot access, lighting, and other vehicle systems.
5. Compact design: Slim and lightweight, making it easy to carry.

Disadvantages of car key card:

1. Battery dependency: Key cards require a power source to function, and a drained battery can render the card useless.
2. High replacement or repair cost: Losing or damaging a key card is more expensive than replacing a traditional key.
3. Vulnerability to electronic theft: Despite robust security, experienced criminals can intercept signals using devices like “relay amplifiers.”
4. Risk of loss: The small size of the card makes it easier to lose or misplace.

Car key card replacement

A car key card is a modern, high-tech solution that combines convenience with robust security. It is particularly popular among drivers who value minimalism and functionality. However, like any electronic system, a key card is not without its downsides, requiring careful handling and periodic battery checks to ensure reliable operation.

If you are faced with a situation where your car key is broken or lost and you need car key card replacement, just call us and we will solve this problem efficiently and quickly. Our phone number is 03330065210. We are available 24/7 for you.