Ignition Switch Problems of Buick Century

The contact owns a 2003 Buick Century. The contact stated that the key was difficult to turn in the ignition switch and the alarm security warning light illuminated. The failures occurred on numerous occasions. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The VIN and failure mileage were unavailable.

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I first noticed the engine shutting off in January of 2014, especially going down a hill. The engine shuts down at different speeds and the air bag light stays on. At first I thought that there was moisture in my gas tank, but after filling up a couple of times and putting in some gas dryer, the problem continued. I usually shift to neutral and start the engine while the car is still moving. I took my remote and other keys off the key ring. It still shuts off the engine with just one key in the ignition switch, but not as much. Can you tell me how I can remedy this problem with my 1998 Buick Century? will this be at my own expense?.

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There's a problem with ignition, consumer has to jiggle key to get it to turn. Please provide any further information.

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Switch. Part name: 10413904.