Volkswagen Jetta Ignition Lock Cylinder is a safe start-up mechanism, which is driver controllable and it also locks the steering column to prevent theft. Through the generations, Jetta models have started with a primitive steering-column unit which consisted of tumblers, a keyed slot and an electrical switch. That original Ignition Lock Cylinder allowed battery power to pass to the starter in START, parts in ACC, or shut it all off in LOCK, where it physically clamped the wheel and allowed the key to be removed. In 1970, government regulations compelled manufacturers to implement such column-placed systems, and Volkswagen followed suit with switches that were safety enhanced over the previous dash-mounted switches, which thieves could easily tamper with. Once thieves learned how to pull the lock and manipulate the switch with a screwdriver, Volkswagen introduced the electronic immobilizer in the 1990s and concealed a chip in the key. With that update, should the metal barrel be forced, the engine computer would not energize the ignition or fuel circuits until it received the proper code. The mechanical components may wear out with time, resulting in a sticky key, unwanted stalling or a complete no-start condition, which are indicators that a new Ignition Lock Cylinder or switch may be required. The new Volkswagen vehicles are more inclined to use push-button start, which moves the security to the fob and the standard cylinder is completely dropped, but the vehicles on the road still use the ancient version of the keyed assembly. An insight into these phases reveals how the brand managed to strike a balance between convenience and anti-theft needs in a small package.
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