Coded Vehicle Keys — Cut and Programmed at Your Location

Coded vehicle keys — also known as programmed or chipped keys — are the standard for all modern cars manufactured in the UK since the mid-1990s. Unlike older mechanical keys, a coded key contains a transponder chip embedded in the head of the key. When the key is placed in the ignition, the transponder communicates a unique rolling or fixed code to the vehicle's ECU. If that code doesn't match, the immobiliser prevents engine start. Excalibur Auto Locksmiths provides a complete coded vehicle key service — key cutting and transponder programming — at your location, with no need to visit a dealer or workshop.

What makes coded keys more complex than simple blanks is the programming step. It isn't enough to cut the key to the correct profile; the transponder chip must be registered to your specific vehicle. Each car's ECU holds a database of authorised key codes, and any new key must be written to that database before it will be accepted. Main dealers charge heavily for this because they hold the manufacturer licences for the programming software. However, Excalibur uses the same category of diagnostic tools as the dealers — and at a significantly lower cost to you.

The process at Excalibur is streamlined by 30 years of practice. Ian or Adam will confirm your vehicle's exact key specification before travelling — make, model, year, and in some cases the VIN to ensure the correct key blank is sourced. On arrival, the key is cut and the transponder is programmed via the vehicle's OBD port using manufacturer-appropriate protocols. We always test the coded key fully — including starting the engine and operating all remote functions — before we consider the job complete.

Ian and Adam have programmed coded keys for every major manufacturer sold in the UK: Ford, Vauxhall, Volkswagen Group, BMW, Mercedes-Benz, Renault, Toyota, Nissan, Honda, Fiat, Peugeot, Citroën, Hyundai, Kia, and more. Whether it's a 2006 Ford Focus or a 2023 Audi Q5, the approach is the same: diagnostic first, programming second, test before leaving. Excalibur is consistently 40–60% cheaper than main dealers for coded key services across the North West.