Volkswagen half smart key (also called a semi-smart key or remote key with transponder) is a type of car key fob used on many Volkswagen (and related VAG-group) models.
What it is
It combines two main functions in one unit:
Remote control — Buttons for locking, unlocking, and opening the trunk/boot.
Immobilizer transponder — An electronic chip that allows the car’s immobilizer system to authorize starting.
Unlike a full smart key (KESSY / Keyless Access / Comfort Access), it does not support true passive/hands-free entry or push-button start while the key stays in your pocket. You still need to insert the mechanical blade (usually a flip-out or emergency key) into the ignition to start the engine.