If your Acura RSX fails to start, and the starter is working properly, the next thing to check is the ignition switch. Typically if you have to play with the key to get the Acura RSX starter to crank, the switch is failing. We recommend replacing the Acura RSX starter switch as soon as you notice the switch beginning to fail. This will keep you from getting stranded. The Acura RSX neutral safety switch on vehicles with automatic transmissions can also fail causing the car not to start.