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Which safety concern arose with monostable shift by wire selectors?

  • A.Failure of the actuator, which prevented the transmission from being moved out of the park position at all
  • B.None
  • C.Unintended selection of reverse, which occurred when the lever was moved past the intended position during a manoeuvre
  • D.Drivers leaving the vehicle believing park was selected

Answer: D

A lever returning to a central rest position gave no tactile confirmation of the gear, and rollaway incidents followed. Automatic park on shutdown and clearer displays were the response. It led to a large recall. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.

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