The Complete Guide to Car Key Types in the UK (2025)
From basic metal keys to full keyless entry systems — a complete reference to every type of car key used in UK vehicles and how each is replaced.
Type 1: Mechanical Key (Pre-1996)
A bare metal key with no electronics. Used on older vehicles. Cheap to cut, no programming required. Increasingly rare on UK roads.
Type 2: Transponder Key (1996–2010)
A key with an embedded chip communicating with the immobiliser. The vehicle will not start without the correct chip signal. Cut + chip programming required.
Type 3: Remote Key (2000–present)
Adds remote central locking buttons to a transponder key. Can be in a single unit or separate fob. Requires cut + transponder programming + remote coding.
Type 4: Flip/Folding Key (2005–present)
A remote key where the blade folds into the fob body. Common on European vehicles (VW, Audi, Vauxhall, Ford). Same process as remote key.
Type 5: Smart / Proximity Key (2010–present)
The vehicle detects the key without insertion. Push-button start. Requires multi-step programming of transponder, proximity sensor, and remote functions.
Type 6: Card Key (2005–present, Renault and others)
A credit card-sized key used by some Renault vehicles. Placed in a dashboard slot rather than a conventional ignition. Unique programming requirements.
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