While driving, the power steering assist intermittently fails without warning. This makes steering very difficult and creates a serious safety hazard, especially at low speeds or during turns. The issue can be temporarily resolved by turning the engine off and restarting the vehicle, but it recurs unpredictably. There are no warning lights or error messages displayed on the dashboard. This is a known issue on this model year and may relate to a defective EPS (electric power steering) module. Please investigate.