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Renault Clio Replacement Key Card Renault use a unique system for their keys and immobilisers. Instead of a key that could open doors and start a vehicle by turning it into the lock, they use a card that is put into a reader inside the dashboard panel. The card can then be connected via a cable to a computer in the vehicle. Immobiliser system Renault key cards offer an affordable and secure alternative to traditional keys for cars. However, it's important to understand the technology behind them in order t