The Lexus ES350 Ignition Lock Assembly protects the car by only allowing a coded key to transmit power to the starter, engine systems, and components. Early models of the Lexus ES350 featured a conventional steering column-mounted Ignition Lock Assembly that included a lock cylinder and electrical switch that required the appropriate metal key to rotate through a sequence of OFF, ACC, ON, and START. Later versions of the Lexus ES350 featured a coded key as part of the same basic Ignition Lock Assembly, the embedded chip linking to the computer to operate the engine crank only if the code is correct, preventing thieves from starting the car by forcing the cylinder. Regardless of generation, the Ignition Lock Assembly also locks the steering wheel in the LOCK position and ties into the shift interlock. In any Lexus ES350, wear or failed contacts inside the Ignition Lock Assembly can jam the key, prevent cranking, or cut power while driving.
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